JP5964646B2 - Building basic structure and its design program - Google Patents

Description

  The present invention relates to a building foundation structure using precast concrete as a foundation beam, a design method and design system, a design program, and a recording medium.

  A foundation structure of a building in which a plurality of precast concrete foundation beams are connected is known (see Patent Document 1). Here, a technique for connecting a male base material and a female base material with high strength is described (see Patent Document 1).

Japanese Patent No. 4761402

When connecting the foundation beams made of precast concrete to each other, the shape and arrangement of the connection fittings become a problem in order to secure the strength of the connection part. Since the foundation structure is designed according to the superstructure of the building, the male and female foundation beams must be appropriately combined within the constraints. Furthermore, if it is integrated with a solid foundation with high seismic resistance to make a structure with uniform support force in any part of the foundation, a complicated design including an independent foundation will result. Even in that case, a combination and arrangement design that fully considers workability and cost is required.
In order to solve the above problems, the present invention optimizes the arrangement of foundation beams and metal fittings for connecting the foundation beams, and as a whole, optimizes the strength, workability and cost of the building. Another object is to provide a design method, a design system, a design program, and a recording medium.

The following configurations are means for solving the above-described problems.
<Configuration 1>
A foundation structure of a building constructed by placing slab concrete with a plurality of foundation beams arranged and slab reinforcement laid,
Each of the foundation beams is made of precast concrete and has a male joint fitting at both ends or one end, a female joint fitting at both ends or one end, or one end One with a male joint fitting and a female joint fitting at the other end ,
Each of the foundation beams is equal to or less than a certain upper limit length determined from transportability, ease of construction, and strength, and the added length L of a pair of adjacent foundation beams that are linearly connected is the upper limit. The length is selected so as not to be less than K,
It said base beams, are connected to each other via a connecting portion of the male joint fitting and the female connecting bracket, outer base portion for supporting the outer peripheral wall corresponding part of the building, other than the outer peripheral wall corresponding part of the building and Configure the inside foundation to support,
The outer base portion has a branch shape constituting the inner base beam, one end of which is sandwiched between end faces of a pair of base beams constituting the straight portion of the outer base portion and projecting in the lateral direction of the outer base portion. One end of the foundation beam is connected and fixed,
The branch-shaped foundation beam has a branch-like discontinuous structure without an annular part, and the one end is supported by the outer foundation part,
The branch-shaped foundation beam has a female joint fitting disposed on one side surface and the other side surface of the end portion, and the female joint bracket includes a connecting portion that connects them, and the branch-shaped foundation beam includes Embedded in the end,
A foundation structure of a building, wherein the pair of female joint fittings is connected to a male joint fitting provided on an end surface of a pair of foundation beams constituting a straight portion of the outer foundation portion .

<Configuration 2>
In the building foundation structure according to Configuration 1 , the connecting portion is provided with a through hole through which a metal fitting connecting the branch-shaped foundation beam and the upper structure of the building passes vertically upward. The basic structure of the building.

<Configuration 3>
A stress calculation means for calculating the stress applied to each foundation beam constituting the foundation structure of the building;
An arrangement calculation means for calculating the arrangement location of the foundation beams necessary to support the stress obtained as a result of the stress calculation;
A pair of adjacent foundations linearly connected to each other at a place where the foundation beams obtained as a result of the calculation are below a certain upper limit length determined from transportability, ease of construction and strength. Allocating means for allocating the foundation beam whose length is selected so that the additional length L of the beam is not less than the upper limit length K ;
Calculate the position where each hardware and bracket is attached so that the hardware connecting the foundation beam and the superstructure of the building and the positions of the male and female joints connecting between the foundation beams do not interfere with each other. Position coordinate calculation means for obtaining position coordinates;
A first connection structure for providing an independent female joint fitting on a side surface other than both ends of the foundation beam constituting the outer foundation portion and coupling with a male joint fitting provided at an end portion of the inner foundation portion; When one of the second connection structures for connecting and fixing one end of the branch-shaped foundation beam to the outer foundation part according to Item 1 can be selected,
When the stress in the direction perpendicular to the side surface applied to the inner base portion is calculated and the stress is below a certain threshold, the first connecting structure is selected, and when the stress exceeds the certain threshold, the second A connection structure selection means for selecting a connection structure of
A metal fitting selecting means for determining a metal fitting to be attached to an end of each foundation beam as a male joint metal fitting or a female joint fitting;
A building foundation structure design system comprising design data output means for outputting design data including lengths of all foundation beams constituting the building foundation structure, types of fittings to be attached, and attachment position coordinates. .

<Configuration 4>
In the foundation structure design system according to Configuration 3 , the foundation beam including the female joint fitting is constructed prior to the foundation beam connecting the male joint fitting to the female joint fitting. A foundation structure design system comprising construction order designation means for determining a construction order, generating construction order data, and including the construction order data in the design data.

<Configuration 5>
5. A foundation structure design system according to Configuration 3 or 4 , further comprising precut data generation means for generating and outputting precut data of an upper structure of a building connected to a hardware of a foundation beam.

<Configuration 6>
In the foundation structure design system according to any one of Configurations 3 to 5 , when the inner foundation portion includes a portion where a plurality of foundation beams intersect or abut each other at a right angle, a direction perpendicular to a side surface of each foundation beam A connection structure selection means for calculating a stress and providing a female joint fitting on the side surface of the foundation beam subjected to a greater stress and selecting a structure to be coupled to the male joint fitting provided at the end of another foundation beam Basic structure design system characterized by comprising

<Configuration 7>
The foundation structure design system according to any one of Configurations 3 to 6 , wherein the foundation beam has a predetermined upper limit length or less and is provided with male joints at both ends, and female joints at both ends. In the foundation structure designed by combining with the foundation beam, the base beam with either male joint and the foundation beam with female joint are connected in a straight line. An additional length calculating means for calculating an additional length of a pair of foundation beams; and, when the additional length is equal to or less than the upper limit length, the pair of foundation beams has a length of the additional length at one end. A foundation structure design system comprising a change processing means for replacing a foundation beam having a male joint fitting and a female joint fitting at the other end.

<Configuration 8>
A step of calculating a stress applied to each foundation beam constituting the foundation structure of the building by the stress calculation means;
A step of calculating an arrangement position of the foundation beam necessary for the arrangement calculation means to support the stress obtained as a result of the stress calculation;
The allocation means is adjacent to the arrangement position of the foundation beam obtained as a result of the calculation, which is not more than a certain upper limit length determined from the transportability, ease of construction, and strength, and is linearly connected. Assigning the foundation beam whose length is selected so that the added length L of the pair of foundation beams is not less than or equal to the upper limit length K ;
The position coordinate calculation means attaches each hardware and metal fitting so that the hardware connecting the foundation beam and the superstructure of the building and the positions of the male joint fitting and female joint fitting connecting the foundation beams do not interfere with each other. Calculating the attachment position and obtaining the position coordinates;
A first connection structure for providing an independent female joint fitting on a side surface other than both ends of the foundation beam constituting the outer foundation portion and coupling with a male joint fitting provided at an end portion of the inner foundation portion; When one of the second connection structures for connecting the outer base portion and the inner base portion according to Item 1 can be selected,
The connection structure selection means calculates a stress in a direction perpendicular to the side surface applied to the inner base portion. When the stress is equal to or less than a certain threshold value, the first connection structure is selected, and the stress is set to a certain threshold value. If so, selecting a second connecting structure;
A step in which the metal fitting selecting means determines a metal fitting to be attached to the end of each foundation beam as a male joint metal fitting or a female joint fitting;
Design data output means for outputting design data including the lengths of all the foundation beams constituting the foundation structure of the building, the types of fittings to be attached, and the attachment position coordinates;
A basic structure design method characterized by comprising:

<Configuration 9>
A basic structure design program that causes a computer to function as each unit of the system according to Configuration 3 .

<Configuration 10>
A computer-readable recording medium on which the basic structure design program according to Configuration 9 is recorded.

<Effect of Configuration 1>
By combining the foundation beams made of precast concrete, the foundation beams can be placed only where they are needed with the optimal dimensions for any part of the foundation structure. The load applied to each part of the foundation can be calculated using, for example, a finite element method, and a foundation structure with sufficient strength can be realized with a minimum foundation, and the cost of the entire foundation can be reduced. Each foundation beam can be firmly connected with a metal fitting, and an independent metal fitting can be arranged on the side surface of the foundation beam of the outer foundation portion to connect the inner foundation portion at an optimum position. Since one end of the inner base portion is firmly fixed to the outer base portion via the metal fitting, the inner base portion can be made into the optimum shape with the minimum necessary.
<Effect of Configuration 2>
Since the inner base portion whose one end is connected and fixed to the outer base portion is supported by the outer base portion, it has sufficient strength even if it is not configured in an annular shape. Therefore, a branch-like discontinuous structure without an annular portion can be obtained. The part where the floor of the building does not exist is a part where a unit bath or the like is accommodated. This part does not require inspection work under the floor. This section is surrounded on all sides by foundation beams. This is the annular part. Since the part where the floor of the building exists has a branch-like discontinuous structure and no annular part is provided, one of the four-way foundation beams can be omitted and used as an inspection hole.
<Effect of Configuration 3>
A branch-shaped foundation beam extending from the straight part of the outer foundation part to the side surface direction of the outer foundation part is used as a part of the outer foundation part. If the end portions are sandwiched between the end faces of the pair of foundation beams that form the straight portion of the outer base portion, a high strength connecting portion can be realized. For example, if an inner base part is connected to this, the strength of the inner base part can be increased.
<Effect of Configuration 4>
In the branch-shaped foundation beam, a hole-down hardware or the like can be attached through the through-hole of the bridge-shaped metal fitting.
<Effect of Configuration 5>
Automatically determine the placement and type of hardware. Design data including the length of all foundation beams to be used, the type of fittings to be attached, and the attachment position coordinates is output and used to control the production line of the foundation beams. The design which arrange | positions an independent female type | mold joint metal fitting in the optimal position of the side surface of the foundation beam of an outside foundation part can be performed.
<Effect of Configuration 6>
The order of construction according to the type of metal fittings can also be automatically determined and used to create work instructions.
<Effect of Configuration 7>
When a precast concrete foundation beam is used, there is no error in the arrangement of hardware, and therefore a connection hole can be provided in advance in the upper structure of the building connected to the foundation beam hardware in a precut process. Workability is significantly improved compared to conventional site construction.
<Effect of Configuration 8>
It is possible to automatically determine whether or not to provide a branch-shaped foundation beam in consideration of the required strength of the inner foundation part.
<Effect of Configuration 9>
It is possible to automatically select the structure of the connecting portion where the bases of the inner base portions intersect.

It is the schematic which shows the basic structure of the building of Example 1. FIG. It is the top view and side view of a joining metal fitting. It is a three-view figure of a height adjustment metal fitting, (a) is a side view, (b) is a front view, (c) is a top view. (C) is the perspective view of the foundation beam under construction, and others are the schematic views which looked at various foundation beams from the upper surface. It is a top view which shows the example of the basic structure of the building by this invention. It is connection structure explanatory drawing for forming a branch-shaped foundation beam. It is explanatory drawing which shows the fixation structure of the joining metal fitting 22 embedded in the foundation beam. It is a figure explaining the structure of the junction part of a foundation beam. It is a block diagram of the design apparatus of a foundation structure. It is a production | generation process operation | movement flowchart of the basic structure design data 78 by a design apparatus. It is a flowchart of the operation | movement which determines the construction order of a foundation beam. It is an operation | movement flowchart which determines the connection structure of the inner side base part extended in branch shape. It is a connection structure calculation operation | movement flowchart in case a foundation beam cross | intersects. It is an operation | movement flowchart which replaces two foundation beams connected linearly with one foundation beam.

  Hereinafter, embodiments of the present invention will be described in detail for each example.

FIG. 1 is a schematic diagram illustrating the basic structure of a building according to the first embodiment.
(A) of a figure is a partial longitudinal cross-sectional view of the integrated foundation containing a foundation beam. As shown in the figure, a foundation structure 10 of a building is formed by placing slab concrete 16 in a state where a plurality of foundation beams 12 are arranged and slab bars 14 are laid.

  Each foundation beam 12 is made of precast concrete. That is, reinforcing bars are assembled in advance and concrete is hardened to a predetermined shape and size. To support the superstructure of the building, it is placed directly under the bearing wall. Each foundation beam 12 is connected to each other via a connecting portion of a male joint fitting 20 as shown in FIG. 1B and a female joint fitting 22 as shown in FIG. FIG.1 (d) is a side view of the foundation beam 12 which attached the male type | mold metal fitting 20 to both ends. As shown in FIG. 1A, the foundation beam 12 is supported above the slab bar 14 using a height adjustment fitting 17. The joining metal fitting will be described in detail with reference to FIG. 2, and the height adjusting metal fitting will be described in detail with reference to FIG.

FIG. 2 is a plan view and a side view of the joint fitting.
FIG. 2A is a plan view of a male joint fitting 20 and an anchor reinforcing bar 34 for supporting and fixing the same to the side surface of the foundation beam 12 (FIG. 1), and FIG. 2B is a side view thereof. FIG. 2C is a plan view of the female joint fitting 22 and the reinforcing bar 34 that supports and fixes it to the side surface of the foundation beam 12, and FIG. 2D is a side view thereof. On the outer periphery of the reinforcing bar 34, a retaining portion 32 is provided by an uneven surface or the like.

  FIG. 2 (e) is a plan view of the male joint fitting 20 provided with four reinforcing bars 34 for anchoring, and FIG. 2 (f) is a side view thereof. This is effective when higher joint strength is required or when the length of the foundation beam 12 is short and the rebar 34 must be shortened. FIG. 2 (g) shows a structure in which the male joint fitting 20 is attached to both ends of the reinforcing bar 34. This structure is suitable when high tensile strength is required. The female joint fitting 22 can also employ the same configuration as (e) to (f).

  All of these joining fittings are supported and fixed by embedding reinforcing bars 34 in the concrete constituting the foundation beam 12. Reinforcing bars 34 are provided with an uneven surface and the like on the outer peripheral surface thereof. If the reinforcing bar 34 has a branch (not shown) or is partially bent, the pull-out strength is further increased. Of course, you may be integrally connected with the reinforcing bar which reinforces the foundation beam 12.

  In some cases, both ends of the foundation beam 12 are provided with male joints, and only one end is provided with male joints, and the other end is provided with no metal fittings. In addition, there are those in which both ends of the foundation beam 12 are provided with female joint fittings, and one end is provided with a female joint fitting, and the other end is not provided with any fitting. Further, there is a type in which a male joint fitting is provided at one end and a female joint fitting is provided at the other end. The basic structure is realized by combining these.

FIGS. 3A and 3B are three views of the height adjustment fitting, wherein FIG. 3A is a side view, FIG. 3B is a front view, and FIG. 3C is a plan view.
A trapezoidal height adjustment fitting 17 as shown in the figure is fixed to the lower surface of the foundation beam 12 as shown in FIG. The foundation beam 12 is supported by the horizontal portion 19 (FIG. 3A). When the screwing amount of the bolt 18 is adjusted, the height of the foundation beam 12 can be adjusted above the slab bar 14 in FIG. Thereby, the mutual height of the adjacent foundation beam 12 can be aligned. The shape of the height adjustment fitting is arbitrary and is not limited to this embodiment.

4 (a), (b), (e), and (d) are schematic views of various foundation beams as seen from above, (b) is a perspective view showing a construction method of the foundation beam, and (d) is construction. It is the schematic seen from the upper surface of the foundation beam after.
A foundation beam 12A shown in FIG. 4A is provided with male joints 20 at both ends. A basic beam 12B shown in FIG. 4B is provided with female joint fittings 22 at both ends. As shown in FIG. 4 (c), the foundation beam 12B is constructed in advance, and the foundation beam 12A is constructed so as to be lowered from above directly below. Thus, the foundation beam 12A and the foundation beam 12B are connected to each other. FIG. 4D shows a state after the connection. The foundation beam 12A and the foundation beam 12B are connected linearly with almost no gap.

  In this way, two types of foundation beams, that is, the foundation beam 12A provided with the male joint fitting 20 and the foundation beam 12B provided with the female joint fitting 22, are prepared, and they are alternately connected to form the entire foundation of the building. Can be configured. In that case, only two types of foundation beams need to be manufactured. Since both foundation beams are bilaterally symmetric, it is not necessary to distinguish their orientation during construction. Therefore, there is an effect that workability is good.

  In addition, when the entire foundation structure is designed by combining the foundation beam 12A provided with only the male joint fitting 20 and the foundation beam 12B provided with only the female joint fitting 22, a foundation beam having a very short dimension is partially formed. A connected part is generated. That is, as shown in FIG. 4 (d), in the portion where the foundation beam 12A provided with the male joint fitting 20 and the foundation beam 12B provided with the female joint fitting 22 are linearly connected, The additional length L of the foundation beam 12 may be the upper limit length K or less. The upper limit length is determined from the ease of transportation and construction of the foundation beam. If it is too long, it will be heavy and will not get on the truck, and the connection will be difficult.

  If the addition length L is less than or equal to the upper limit length K, the number of parts can be reduced by using two foundation beams as one, and the construction work can be shortened. Accordingly, these foundation beams are replaced with a foundation beam 12C having a length of the addition length L as shown in FIG. The foundation beam 12C has a male joint fitting 20 at one end and a female joint fitting 22 at the other end.

  The upper limit length K is a constant value determined from the transportability and strength of the foundation beam. Therefore, all the portions below the upper limit length K can be automatically set to use the foundation beam 12C. However, the foundation beam 12C restricts the construction order of adjacent foundation beams. As shown in FIG. 4C, the adjacent foundation beam 12A cannot be constructed unless after the foundation beam 12B is constructed. The foundation beam on the female joint 22 side of the foundation beam 12C cannot be constructed in advance.

  For this reason, the order of construction is clearly indicated in advance, and for example, a restriction that two or more foundation beams 12C having this structure are not adjacent to each other is provided, and it is preferable to assume the minimum use. As a whole, it is possible to reduce the number of members and reduce the connection work between the foundation beams while taking advantage of the low cost and easy construction.

FIG. 5 is a plan view showing an example of the basic structure of a building according to the present invention.
As already explained, by combining the foundation beams made of precast concrete, it is possible to place the foundation beams only where they are needed with optimal dimensions in any part of the foundation structure. Conventionally, grid-like foundation structures have been the mainstream, but if the entire foundation is divided into small area sections and the load applied to each section is calculated using, for example, the finite element method, etc. You can determine the necessary support. Utilizing the result increases the number of places where the foundation can be partially omitted. That is, a branch-like basic structure as shown in the example of FIG. 5 can be realized. This also reduces the overall cost of the foundation. In the figure, the black circles are the connecting portions of the male joint fitting 20 and the female joint fitting 22. From the position of the black circle, it can be distinguished which foundation beam has the female joint fitting 22.

  Here, each foundation beam constitutes either the outer base portion A that supports a portion corresponding to the outer peripheral wall of the building or the inner base portion B that supports a portion other than the portion corresponding to the outer peripheral wall of the building. The outer base portion A has a portion E extending in a branch shape from the outer base portion with the end portions sandwiched between end surfaces of the pair of base beams (portion F in the drawing). Further, the inner base portion B includes an annular portion C that surrounds the four sides of the section D where the floor of the building does not exist, a portion G where the base beams abut each other at a right angle, and a portion H where the base beams intersect each other at a right angle. is there. Since the inner base portion having one end connected and fixed to the outer base portion can be supported by the outer base portion, the inner base portion has sufficient strength without being configured in an annular shape. Therefore, a branch-like discontinuous structure without an annular portion can be obtained.

  The part where the unit bath is stored is surrounded by the foundation beam on all sides. This is the annular portion C. Generally, a structure that can be inspected is required under the floor of a building. The section where the unit bath is stored does not have a building floor, so this section does not require inspection work under the floor. On the other hand, the part where the floor of the building exists has a branch-like discontinuous structure, so that it can be easily inspected. This is also an advantage of such a basic structure.

FIG. 6 is an explanatory diagram of a connection structure for forming a branch-shaped foundation beam.
(A) shows the example which provided the female type | mold joining metal fitting 22 in the side surface of one edge part. The end fitting of the foundation beam 12 can be attached not only to its end face but also to the side face. The foundation beam which comprises an outer side foundation part is arrange | positioned in the part which contact | connects an edge part at right angles mutually. Furthermore, independent female joint fittings 22A are provided on the side surfaces other than both ends. To this independent female joint fitting 22A, the male joint fitting 20 provided at the end of one of the foundation beams constituting the inner foundation is connected. In this way, an inner foundation with sufficient strength can be realized with a minimum foundation.

  FIG. 6C shows another example of the branch structure of the foundation beam. As shown in the drawing, the foundation beam 12A having the male joint fitting 20 is arranged on a straight line. These foundation beams 12A constitute an outer foundation portion. On the other hand, female joint fittings 22 are arranged on both side surfaces sandwiching the end of one foundation beam 12D. In this way, the branch-shaped foundation beam 12D is provided which is sandwiched between the end surfaces of the pair of foundation beams 12A constituting the straight portion of the outer foundation portion and partially projects in the side surface direction of the outer foundation portion. Since the end is sandwiched between the other foundation beams 12A, the foundation beam 12D has a very strong structure against the force in the lateral direction (the direction of arrow Y in the figure). An inner base portion (not shown) connected to the foundation beam 12D is also effective in maintaining high strength. It is the structure illustrated to the part of FIG. 5E.

  FIG.6 (c) is the schematic which looked at the foundation beam arrange | positioned so that it may mutually cross | intersect at right angles from the upper direction. In this way, when there are portions where the plurality of foundation beams intersect or abut each other at right angles, the female joint fitting 22 is provided on the side surface of one of the foundation beams. The stress in the direction perpendicular to the side surface of each foundation beam is calculated in advance, and a female joint fitting may be provided on the side surface of the foundation beam in the direction of receiving a greater stress. Even in that case, the strength can be increased as in the example of FIG. It is the structure illustrated to the part of FIG.

  FIG. 7 is an explanatory view showing a fixing structure of the joint fitting 22 embedded in the foundation beam. FIG. 7A is a plan view of a metal fitting having female joint fittings 22 arranged at both ends, FIG. 7B is a side view thereof, and FIG. 7C is an end view thereof. Moreover, (d) is a side view which shows the connection structure of the foundation beam from which height differs.

  In the foundation beam shown in FIGS. 6C and 6D, as shown in FIG. 7A, fittings having female joints 22 arranged at both ends are embedded so as to cross the foundation beam 12. ing. The female joints 22 at both ends are connected by a connecting portion 24 having a through hole 25. With this structure, it is possible to maintain a high strength against a tensile load applied from the foundation beam connected to the female joint fittings 22 at both ends. Furthermore, since the through-hole 25 is provided in the connection part 24, a hole-down metal fitting, an anchor bolt, etc. can be protruded from here.

  As shown in FIGS. 7B and 7C, a bottom plate 23 is provided on the lower surface of the female joint fitting 22. When the male joint fitting 20 (FIG. 1) is fitted into the female joint fitting 22, the bottom plate 23 is fitted to the female joint fitting 20 so that the male joint fitting 20 fits in the optimal state. Prevents penetration. This is preferably a common structure for all the female joint fittings 22.

  In FIG. 7D, the left foundation beam 12e and the right foundation beam 12f have different heights. Depending on the superstructure of the building, foundation beams with different heights may be required. In that case, as shown in the lower left of the figure, it is advisable to embed a fixed base beam 12e in which the male joint fitting 20 is fixed to a substantially triangular fixing frame 28 made of a metal plate.

  8A and 8B are views for explaining the structure of the joint portion of the foundation beam, in which FIG. 8A is an end view of the foundation beam of the portion where the female joint fitting 22 is provided, and FIG. 8B is a partial longitudinal section along the line XX. (C) is a partial top view, (d) is an end view of the foundation beam of a portion where the male joint fitting 20 is provided, (e) is a partial longitudinal sectional view along the YY line, and (f) is a partial view. It is a top view.

  As described with reference to FIG. 6, the female joint fitting 22 can be disposed in each part of the foundation beam. The structures are all as shown in FIGS. 8 (a) to 8 (c). A groove 35 having a predetermined length is provided in the base beam 12B in FIG. The female joint fitting 22 is arranged at the lower end of the groove 35 so as to be entirely hidden in the groove 35. The female joint fitting 22 is supported and fixed by a reinforcing bar 34 embedded in the main body.

  On the other hand, the male joint fitting 20 is disposed so as to project a portion that fits into the female joint fitting 22 from the slightly wider groove 36 (FIG. 8F). Similarly, it is supported and fixed by a reinforcing bar 34. In the example of the figure, the basic beams 12A and 12B will be described as an example, but this structure is the same as that of the basic beam shown in FIG.

  Here, the groove 35 in which the female joint fitting 22 is disposed can lower the protruding tip portion of the male joint fitting 20 vertically downward from the upper surface of the foundation beam 12 to the female joint fitting 22. The cross-sectional dimension is set. On the other hand, the groove 36 in the portion where the male joint fitting 20 is disposed is preferably slightly shallow and wide.

  Below the male joint fitting 20 and the female joint fitting 22, a shear cotter 26 made up of stepped recesses is provided. The lower end of the upper groove 36 reaches the shear cotter 26 on the lower side of the male joint fitting 20. After fitting the male joint fitting 20 into the female joint fitting 22, a grout material is injected into the joint portion of the foundation beam 12 from above through the groove 36. The grout material solidifies by filling the space between the opposed surfaces of the foundation beams 12A and 12B, the groove 35 side, and the space between the pair of opposed shear cotters 26. That is, the groove 36 serves as a guide groove for injecting the grout material.

FIG. 9 is a block diagram of the foundation structure design apparatus.
The design of the foundation structure as described above is automated by this device. The illustrated design device 42 includes an arithmetic processing device 44 and a storage device 46. The design device 42 is realized by a personal computer having a man-machine interface such as a display, a keyboard, and a mouse.

  Each means provided in the arithmetic processing unit 44 represents a functional block given to the computer by a computer program. The storage device 46 stores data used for arithmetic processing and data processed during the arithmetic processing. The building design data 76 stored in the storage device 46 is the design data of the entire building including the superstructure, or only the data necessary for the basic structure design calculation is extracted from the design data.

  The foundation structure design data 78 includes data such as an identification number, an array position coordinate, and a length for each foundation beam. The identification number may be a serial number assigned to all foundation beams. The arrangement position coordinate indicates the position of the foundation beam on each foundation beam. The length is the length in the longitudinal direction. The width and shape are constant. Furthermore, data on whether the metal fitting to be attached is a male type or a female type and the fitting position coordinates of the metal fitting are included. In addition, position coordinates of embedding positions such as hole down hardware and anchor bolts are included. And the data which show the construction order according to the kind of hardware are included. These data are output as a result of the arithmetic processing described below.

  The upper limit length data 82 of the foundation beam is the upper limit length of the foundation beam determined for the reason of the ease of transportation and construction described with reference to FIGS. Since it differs depending on the type of the foundation beam, the corresponding one is stored in the storage device 46. The superstructure precut data 84 is precut data of the superstructure structural material. All or part of the precut data may be used. From the position coordinates of the hardware included in the foundation structure design data 78, the position coordinates 86 of the connection holes of the hardware are obtained. If this is included in the pre-cut data 84 of the upper structure, a connection hole for a hardware can be provided in advance.

When using precast concrete foundation beams, there is no error in the placement of metal fittings.
A connection hole can be provided in advance in the upper structure of the building to be connected to the metal fixture of the foundation beam in the precut process. Workability is significantly improved compared to conventional site construction.

  Next, the function of each means provided in the arithmetic processing unit 44 will be described. The foundation structure design means 50 has a function of reading the building design data 76 and transferring it to the following means, editing the output, and generating and outputting the foundation structure design data 78. The stress calculation means 52 has a function of calculating the stress applied to each foundation beam constituting the foundation structure of the building. The arrangement calculation means 54 has a function of calculating the arrangement position of the foundation beams necessary to support the stress obtained as a result of the stress calculation.

  The allocating means 56 has a function of allocating a foundation beam having a length less than or equal to the maximum allowable length to the arrangement location of the foundation beam obtained as a result of the arrangement location calculation. The position coordinate calculation means 58 attaches hardware and metal fittings so that the hardware connecting the foundation beam and the superstructure of the building and the positions of the male joint fitting and female joint fitting connecting the foundation beams do not interfere with each other. It has a function to calculate position and obtain position coordinates.

  The coordinate adding means 60 has a function of detecting a position where the inner base portion is connected to the side surface of the foundation beam of the outer base portion, and adding the detected position to a position coordinate for attaching an independent female joint fitting. The metal fitting selection means 62 has a function of determining a metal fitting to be attached to the end portion of each foundation beam as a male joint fitting or a female joint fitting. The design data output means 64 has a function of outputting design data including the lengths of all foundation beams constituting the foundation structure of the building, the types of fittings to be attached, and the attachment position coordinates.

  The construction order designating means 66 determines the construction order of each foundation beam so that the foundation beam including the female joint fitting is constructed before the foundation beam connecting the male joint fitting to the female joint fitting. The construction order data 80 is generated and included in the design data. By these means, the foundation structure design data 78 can be automatically generated and used to control the production line of the foundation beam. The order of construction according to the type of metal fittings can also be automatically determined and used to create work instructions.

  The precut data generating means 68 has a function of generating and outputting precut data of the superstructure of the building connected to the foundation beam bracket. The connection structure selection means 70 automatically selects the structure when providing a branch-like foundation beam. First, the first connection structure is set to the one shown in FIG. 6B, and the second connection structure is set to the one shown in FIG. 6C.

  That is, an independent female joint fitting is provided on the side surface other than both ends of the foundation beam constituting the outer base portion, and the first joint is connected to the male joint fitting provided at the end portion of the inner base portion. Set in the structure. Also, a branch shape sandwiched between the end faces of a pair of foundation beams constituting the straight portion of the outer foundation portion, connected to the outer foundation portion via a bridge-shaped bracket, and partially extending in the lateral direction of the outer foundation portion The one that connects the inner foundation to the foundation beam is set to the second connection structure.

  As shown in FIG. 6D, the connection structure selection means calculates the stress in the direction perpendicular to the side surface applied to the inner base portion, and when this stress is below a certain threshold value, the first connection structure When this stress exceeds a certain threshold value, the second connection structure is selected.

  As shown in FIG. 6E, the connection structure selection means 70 is provided in a direction perpendicular to the side surface of each foundation beam when there are portions where the plurality of foundation beams intersect or abut each other at right angles on the inner foundation portion. The function to calculate the stress and select the structure to connect with the male joint fitting provided at the end of the other foundation beam by providing the female joint fitting on the side of the foundation beam in the direction to receive the greater stress Have.

  The addition length calculation means 72 is designed to be a combination of a foundation beam having a male joint fitting at both ends and a foundation beam having a female joint fitting at both ends, which is equal to or shorter than a predetermined upper limit length. Calculate the additional length of a pair of adjacent foundation beams at the part where the foundation beam with either male joint fitting and the foundation beam with female joint fitting is connected in a straight line. It has a function to do.

  When the addition length is equal to or shorter than the upper limit length, the change processing means 74 includes a pair of foundation beams, a length of the addition length, a male joint fitting at one end, and a female joint fitting at the other end. It has a function to replace the foundation beam provided. This is the process described in FIGS. 4 (d) and 4 (e). The operation of the above means will be specifically described below.

FIG. 10 is a flowchart showing the operation of generating the basic structure design data 78 by the design apparatus.
First, in step S <b> 11, the foundation structure design means 50 reads building design data 76 from the storage device 46. In step S12, the stress calculation means 52 calculates the stress applied to each foundation beam. In step S13, the arrangement calculation means 54 calculates the arrangement location of the foundation beam. In step S14, the allocation means 56 selects the length of the foundation beam, and in step S15, the arrangement location is allocated. In step S16, the position coordinate calculation means 58 calculates the attachment position coordinates of the hardware.

  In step S <b> 17, the coordinate adding means 60 detects the connection position of the inner base portion, and in step S <b> 18, the position coordinate of the independent female joint fitting is added to the basic structure design data 78. In step S19, the metal fitting selection means 62 selects whether to attach a male joint fitting or a female joint fitting for each foundation beam. Assuming that the basic beams having the structures shown in FIGS. 4A and 4B are arranged as shown in FIG. 4D, the metal fittings may be selected in order.

  Thereafter, the design data output means 64 summarizes the calculation results so far and outputs the foundation structure design data 78 in step S20. Further, the precut data generation means 68 reads the position coordinates of the hardware contained in the foundation structure design data 78, and outputs the position chart 86 of the hardware connection hole for precutting in step S21.

FIG. 11 is a flowchart of an operation for determining the construction order of the foundation beam.
First, in step S31, the construction order designating unit 66 selects a foundation beam including a female joint fitting. This is a process of selecting a foundation beam having the structure shown in FIG. In the next step S32, a base beam for connecting the male joint fitting to this fitting is selected. This is a process of selecting a foundation beam having the structure shown in FIG. Then, the construction order of adjacent foundation beams is determined such that the foundation beam including the female joint fitting is first and the side having the male joint fitting is later (step S33).

  In step S34, it is determined whether or not the construction order of all foundation beams has been determined. If the result of this determination is yes, the process proceeds to step S35, and if no, the process returns to step S31. Thus, when the construction order is determined for all the foundation beams, construction order data 80 is generated in step S35. In step S36, the construction order designating unit 66 outputs data so as to add the construction order data to the foundation structure design data 78.

FIG. 12 is an operation flowchart for determining the connection structure of the inner base portion extending in a branch shape.
In step S41, the connection structure selection means 70 selects a portion that requires an inner base portion extending in a branch shape. This processing is performed by reading the basic structure design data 78. In step S42, the stress applied to the side surface of the inner base portion of the selected portion is calculated. This stress is in the vicinity of the connecting portion between the outer base portion and the inner base portion. In step S43, the connection structure selection means 70 determines whether the stress is below a certain threshold value.

  The threshold value is set in advance according to the strength of the connecting portion of the metal fitting. When the result of this determination is yes, the process proceeds to step S44, and when no, the process proceeds to step S45. In step S44, the first connection structure is selected. In step S45, the second connection structure is selected. Thereafter, the connection structure selection means 70 outputs the calculation result in order to write the position coordinates of the metal fitting at the time of the selected connection structure in the foundation structure design data 78 in step S46.

FIG. 13 is a flowchart of the connection structure calculation operation when the foundation beams intersect.
In step S51, the connection structure selection unit 70 detects an inner base portion where a plurality of base beams intersect at right angles. Next, in step S52, the stress applied to the side surface of each foundation beam at the intersecting portion is calculated. In step S53, the side surface of the foundation beam that receives greater stress is selected. In step S54, a female joint fitting is provided on the side surface, and attachment position coordinates are determined. In step S55, the male joint fitting is provided at the end of the other foundation beam, and the attachment position coordinates are determined. Thereafter, the determined position map is output for adding to the foundation structure design data 78.

  Next, in step S56, the connection structure selection unit 70 detects an inner base portion where a plurality of foundation beams collide at a right angle. In step S57, the stress applied to the side surface of each foundation beam is calculated. In step S58, the side surface of the foundation beam that receives greater stress is selected. In step S59, a female joint fitting is provided on the side surface, and attachment position coordinates are determined. In step S60, a male joint fitting is provided at the end of another foundation beam, and the attachment position seating table is determined. Thereafter, the determined position map is output for adding to the foundation structure design data 78.

FIG. 14 is an operation flowchart in which two foundation beams connected in a straight line are replaced with one foundation beam.
First, in step S61, the upper limit length K of the foundation beam is selected. This processing is performed by the addition length calculation means 72 by reading the upper limit length data 82 of the foundation beam stored in the storage device 46. In step S62, the foundation structure design data 78 is referred to and a linearly connected portion of the foundation beam is detected. In step S63, the addition length of a pair of adjacent foundation beams is calculated. In step S64, the addition length calculation means 72 determines whether or not the addition length L is equal to or less than the upper limit length K. If the result of this determination is yes, the process proceeds to step S65, and if no, the process proceeds to step S67.

  In step S65, the addition length calculation means 72 determines whether one is a male-male type foundation beam and the other is a female-female type foundation beam. If the result of this determination is yes, the process proceeds to step S66, and if no, the process proceeds to step S67. In step S66, the change processing means 74 executes a process of replacing with a male-female foundation beam having an addition length L. Accordingly, the basic structure design data 78 is rewritten. In step S67, it is determined whether or not linearly connected portions have been detected for all the foundation beams. If it has been detected, the process is terminated. If there is an undetected item, the process returns to step S62. As described above, the basic structure setting data 78 is optimized.

  Note that the means included in the arithmetic processing unit may be modularized in units shown in functional blocks, or may be integrated by combining a plurality of functional blocks. Further, the computer program for realizing the above means may be used by being incorporated in an existing application program. The computer program for realizing the present invention can be recorded on a computer-readable recording medium such as a CD-ROM and installed in any information processing apparatus for use.

DESCRIPTION OF SYMBOLS 10 Building basic structure 12 Foundation beam 14 Slab reinforcement 16 Slab concrete 17 Height adjustment metal fitting 18 Bolt 19 Horizontal part 20 Male joint metal fitting 22 Female joint metal fitting 22A Independent female joint metal fitting 23 Bottom plate 24 Connection part 25 Through-hole 26 Shear cotter 28 Fixed frame 32 Retaining prevention part 34 Reinforcing bar 35 Groove 36 Groove 42 Design device 44 Processing unit 46 Storage device 50 Basic structure design means 52 Stress calculation means 54 Array calculation means 56 Allocation means 58 Position coordinate calculation means 60 Coordinate addition means 62 Metal fitting selection means 64 Design data output means 66 Construction order designation means 68 Precut data generation means 70 Connection structure selection means 72 Addition length calculation means 74 Change processing means 76 Building design data 78 Foundation structural design data 80 Construction order data 82 Foundation beam Maximum length data 84 Pre-cut data for superstructure Data position coordinates

Claims (10)

A foundation structure of a building constructed by placing slab concrete with a plurality of foundation beams arranged and slab reinforcement laid,
Each of the foundation beams is made of precast concrete and has a male joint fitting at both ends or one end, a female joint fitting at both ends or one end, or one end One with a male joint fitting and a female joint fitting at the other end ,
Each of the foundation beams is equal to or less than a certain upper limit length determined from transportability, ease of construction, and strength, and the added length L of a pair of adjacent foundation beams that are linearly connected is the upper limit. The length is selected so as not to be less than K,
It said base beams, are connected to each other via a connecting portion of the male joint fitting and the female connecting bracket, outer base portion for supporting the outer peripheral wall corresponding part of the building, other than the outer peripheral wall corresponding part of the building and Configure the inside foundation to support,
The outer base portion has a branch shape constituting the inner base beam, one end of which is sandwiched between end faces of a pair of base beams constituting the straight portion of the outer base portion and projecting in the lateral direction of the outer base portion. One end of the foundation beam is connected and fixed,
The branch-shaped foundation beam has a branch-like discontinuous structure without an annular part, and the one end is supported by the outer foundation part,
The branch-shaped foundation beam has a female joint fitting disposed on one side surface and the other side surface of the end portion, and the female joint bracket includes a connecting portion that connects them, and the branch-shaped foundation beam includes Embedded in the end,
A foundation structure of a building, wherein the pair of female joint fittings is connected to a male joint fitting provided on an end surface of a pair of foundation beams constituting a straight portion of the outer foundation portion . In the basic structure of the building according to claim 1,
The building base structure according to claim 1, wherein the connecting portion is provided with a through-hole through which a metal fitting connecting the branch-shaped foundation beam and the upper structure of the building passes vertically upward. A stress calculation means for calculating the stress applied to each foundation beam constituting the foundation structure of the building;
An arrangement calculation means for calculating the arrangement location of the foundation beams necessary to support the stress obtained as a result of the stress calculation;
A pair of adjacent foundations linearly connected to each other at a place where the foundation beams obtained as a result of the calculation are below a certain upper limit length determined from transportability, ease of construction and strength. Allocating means for allocating the foundation beam whose length is selected so that the additional length L of the beam is not less than the upper limit length K ;
Calculate the position where each hardware and bracket is attached so that the hardware connecting the foundation beam and the superstructure of the building and the positions of the male and female joints connecting between the foundation beams do not interfere with each other. Position coordinate calculation means for obtaining position coordinates;
A first connection structure for providing an independent female joint fitting on a side surface other than both ends of the foundation beam constituting the outer foundation portion and coupling with a male joint fitting provided at an end portion of the inner foundation portion; When one of the second connection structures for connecting and fixing one end of the branch-shaped foundation beam to the outer foundation part according to Item 1 can be selected,
When the stress in the direction perpendicular to the side surface applied to the inner base portion is calculated and the stress is below a certain threshold, the first connecting structure is selected, and when the stress exceeds the certain threshold, the second A connection structure selection means for selecting a connection structure of
A metal fitting selecting means for determining a metal fitting to be attached to an end of each foundation beam as a male joint metal fitting or a female joint fitting;
A building foundation structure design system comprising design data output means for outputting design data including lengths of all foundation beams constituting the building foundation structure, types of fittings to be attached, and attachment position coordinates. . In the foundation structure design system according to claim 3,
Determine the construction order of each foundation beam so that the foundation beam including the female joint fitting is constructed before the foundation beam connecting the male joint fitting to the female joint fitting. A foundation structure design system comprising construction order designation means for generating and including in the design data. In the foundation structure design system according to claim 3 or 4,
A foundation structure design system comprising precut data generation means for generating and outputting precut data of a superstructure of a building connected to a base beam hardware. In the foundation structure design system according to any one of claims 3 to 5,
When the inner foundation has a portion where a plurality of foundation beams intersect or abut each other at right angles to each other, calculate the stress in the direction perpendicular to the side of each foundation beam and A foundation structure design system comprising a connecting structure selecting means for selecting a structure to be connected to a male joint fitting provided at an end of another foundation beam by providing a female joint fitting. In the foundation structure design system according to any one of claims 3 to 6,
Within a foundation structure designed to combine a foundation beam with male joints at both ends and a foundation beam with female joints at both ends. An addition length calculation means for calculating the addition length of a pair of adjacent foundation beams in a portion where the foundation beam provided with any male joint fitting and the foundation beam provided with the female joint fitting are linearly connected;
When the addition length is equal to or shorter than the upper limit length, the pair of foundation beams has the length of the addition length, a male joint fitting is provided at one end, and a female joint fitting is provided at the other end. A foundation structure design system comprising a change processing means for replacing a foundation beam. A step of calculating a stress applied to each foundation beam constituting the foundation structure of the building by the stress calculation means;
A step of calculating an arrangement position of the foundation beam necessary for the arrangement calculation means to support the stress obtained as a result of the stress calculation;
The allocation means is adjacent to the arrangement position of the foundation beam obtained as a result of the calculation, which is not more than a certain upper limit length determined from the transportability, ease of construction, and strength, and is linearly connected. Assigning the foundation beam whose length is selected so that the added length L of the pair of foundation beams is not less than or equal to the upper limit length K ;
The position coordinate calculation means attaches each hardware and metal fitting so that the hardware connecting the foundation beam and the superstructure of the building and the positions of the male joint fitting and female joint fitting connecting the foundation beams do not interfere with each other. Calculating the attachment position and obtaining the position coordinates;
A first connection structure for providing an independent female joint fitting on a side surface other than both ends of the foundation beam constituting the outer foundation portion and coupling with a male joint fitting provided at an end portion of the inner foundation portion; When one of the second connection structures for connecting the outer base portion and the inner base portion according to Item 1 can be selected,
The connection structure selection means calculates a stress in a direction perpendicular to the side surface applied to the inner base portion. When the stress is equal to or less than a certain threshold value, the first connection structure is selected, and the stress is set to a certain threshold value. If so, selecting a second connecting structure;
A step in which the metal fitting selecting means determines a metal fitting to be attached to the end of each foundation beam as a male joint metal fitting or a female joint fitting;
Design data output means for outputting design data including the lengths of all the foundation beams constituting the foundation structure of the building, the types of fittings to be attached, and the attachment position coordinates;
A basic structure design method characterized by comprising:   A basic structure design program for causing a computer to function as each means of the system according to claim 3.   A computer-readable recording medium on which the basic structure design program according to claim 9 is recorded.

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