JP4238283B2 - Building structural design support system - Google Patents

Description

  The present invention relates to a building structural design support system used when building structural design is performed by integrating wall quantities.

  Conventionally, there has been known a design support system that generates data for performing detailed structural calculation and picking up members for what has been roughly designed by a designer such as a floor plan and a position of a bearing wall (patent) References 1, 2 etc.).

  For example, the housing performance display wall quantity calculation system disclosed in Patent Document 1 selects the one that contributes to the strength among the walls of the building, integrates the amount of the wall, and clearly and easily displays the performance of the building. is there.

In other words, in this residential performance display wall quantity calculation system, members such as columns and braces are detected from the drawing of the building, and those that can be determined as load bearing walls are automatically determined, and based on the walls determined as load bearing walls. The wall quantity is calculated and the position of the load-bearing wall is output to the drawing to create a wall quantity calculation document with a clear basis.
Japanese Patent No. 3478801 JP 2000-38768 A

  However, the above-described housing performance display wall amount calculation system is a system that extracts what can be regarded as a load bearing wall on the premise of the presence of the load bearing wall. On the other hand, the structural design method of buildings is not only a method that is simplified to some extent by integrating the amount of the load-bearing walls, but also the limit load-bearing design method that performs dynamic calculations using structural models. And the allowable stress design method.

  And the structural design of a building that has a main frame structure consisting of a rigid frame structure consisting of multiple columns and beams that are installed horizontally above and below is not a method of integrating the amount of load-bearing walls. This is done by the stress design method. In addition, members such as outer wall panels attached to buildings are known to exhibit the function of suppressing deformation of buildings when a horizontal external force acts due to an earthquake, but structural design is based on a ramen structure. The actual situation is that it is not considered as a seismic structural member.

  Therefore, the present invention is a building structural design support system that can easily perform an accurate performance evaluation of a building by converting a member that can be evaluated as a structural member even if it is a member other than a bearing wall into a wall amount. The purpose is to provide.

  To achieve the above object, the building structural design support system of the present invention includes a design condition setting means for setting an action load used for structural design of a building by taking in from at least one of the input means and the storage means, Building data setting means for setting roof data, shape data of each floor, opening data, outer wall data and member data necessary for the structural design by fetching from at least one of the input means and storage means, and the design condition setting And a necessary wall amount calculating means for calculating a required wall amount for each predetermined direction of the building based on the setting of the building data setting means, and a member other than the load bearing wall based on the setting of the building data setting means The wall quantity conversion means for replacing the wall quantity with the wall quantity, and the effective wall quantity for each direction of the building including the wall quantity converted by the wall quantity conversion means is calculated. Wherein the effective wall amount calculating means, further comprising: a judging means for judging the strength of the building on the basis of said effective wall amount and the required wall amount.

  Here, the building includes a frame structure that joins a plurality of columns and beams that are horizontally mounted above and below, and a wall panel that is attached to the frame structure. In the wall amount conversion means, The column, the beam, and the wall panel can be replaced with a wall amount.

  Moreover, the structure provided with the required wall amount correction | amendment means which calculates the eccentricity rate of the said building and correct | amends the said required wall amount based on the eccentricity rate may be sufficient.

  Further, the storage means stores data of a combination of a column and a beam whose cross section is specified and a material of a building unit having a frame structure in which a plurality of columns and beams horizontally mounted above and below are joined. The combination of the column and the beam may be a combination calculated based on the horizontal displacement for each design condition.

  The structural design support system for a building according to the present invention configured as described above includes wall amount conversion means for replacing members other than the load-bearing wall with wall amounts.

  For this reason, it is possible to accurately evaluate a structural member other than the load bearing wall as a member that contributes to the performance of the building by using a simple design method of integrating the wall amount.

  In addition, when a building has a framework structure as a main structure, it is possible to design based on the amount of walls and also to take into account members that were not previously incorporated as structural members, such as outer wall panels. .

  Furthermore, by calculating the eccentricity of the building and correcting the required amount of walls based on the eccentricity, it is possible to perform an accurate design according to the actual structure.

  Also, the combination of columns and beams calculated based on the horizontal displacement for each design condition is stored in the storage means, and if that combination is used, even a building with a frame structure will be applied to the entire building. It is not necessary to check the allowable stress level, and the calculation can be simplified.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram showing a schematic configuration of a building structural design support system 1 according to the present embodiment.

  The structural design support system 1 includes an input unit 2 for inputting design conditions and building data, a storage unit 3 for storing data and programs necessary for building structural design, an input unit 2 and a storage unit. 3 is mainly configured by an operation unit 4 that performs an operation by fetching data from at least one of 3 and an output unit 5 that outputs the operation result.

  This input means 2 includes a scanner used when reading a plan view printed on paper, a pointing device such as a mouse used when inputting by moving a pointer on the screen, a numerical value or a name It consists of a keyboard that is used when entering

  The storage means 3 may be configured by selecting necessary storage media such as a hard disk, CD-ROM, flash memory, and ROM.

  The storage means 3 includes a program, numerical values determined by laws and regulations related to the structural design policy of the building, reference modules that are generally selected as design modules, standard dimensions of various plans and building units. Data is stored.

  Further, the output means 5 is constituted by a printer, a monitor, or the like.

  In addition, as shown in the one-dot chain line in FIG. 1, the arithmetic unit 4 includes a design condition setting unit 41, a building data setting unit 42, a necessary wall amount calculating unit 43, a wall amount converting unit 44, and an effective unit. It is mainly composed of a wall amount calculating means 45 and a judging means 46.

  In the present embodiment, the structural design is performed according to a specification rule that determines the length of the load bearing wall (wall amount) required for the floor area with a formula simplified to some extent. There are two types of design methods based on the amount of walls: the “Building Standards Act” and the “Law for Promotion of Housing Quality Assurance” (so-called quality assurance method). In this structural design support system 1, Either method can be selected.

  The design condition setting means 41 takes in and sets numerical values such as the amount of snow, the structural grade, the reference wind speed, and the earthquake coefficient necessary for the design from the input means 2 and the storage means 3.

  For example, since the load acting on the building varies depending on the assumed snow cover, the snow cover is set to 50, 80, 100, 150, 200 cm depending on the region. This setting may be such that, for example, when an area is input from the input unit 2, data is read from a database that associates the area stored in the storage unit 3 with the amount of snow and is set. Furthermore, the unit load of snow can be changed depending on the region.

  In addition, the structural grade is a condition that determines how large an earthquake can be designed for a building. For example, in the accuracy method, the seismic force of an earthquake that occurs once every several hundred years (depending on the region) is used. Grade 1 is the degree of damage that does not collapse, collapse, and does not damage the seismic force that occurs once every decades, and the building that can withstand 1.25 times the seismic force of Grade 1 is 1.5 times that of Grade 2 and Grade 1. Buildings that can withstand the seismic force are grade 3.

  Furthermore, the reference wind speed is a condition that determines how large a windstorm can be designed for, and for example, the grade is set in two stages in the accuracy method.

  The earthquake coefficient is normally set to 1.0, but values such as 0.8 and 0.9 can be set in areas where a large earthquake is unlikely to occur.

  Furthermore, in the design condition setting means 41, whether additional equipment that acts on the building, such as a rooftop balcony, a cantilever balcony, an outside staircase, an elevator, and a solar panel, is included as a load condition or a floor area. In this way, it is possible to select whether or not to set as a design condition.

  The building data setting means 42 sets building roof data, shape data of each floor, opening data, outer wall data, member data, and the like necessary for structural design.

  That is, since the wall coefficient when calculating the required wall amount is different between when the building is heavy and when it is light, the material and shape used for the roof and the outer wall are set as building data.

  For example, the roof has different found areas due to differences in shapes such as dormitories, gables, and single-floor roofs, and the required wall amount with respect to wind pressure differs, so that shape data is set as roof data. In addition, the amount of walls required for seismic force may vary greatly depending on whether heavy materials such as tiles or light materials such as metal plates are used for the roof finishing material. ) Can be set as roof data.

  Further, the building data setting means 42 sets items related to the shape of the building, such as shape data defining the planar shape of each floor of the building and opening data defining the opening position of the wall. For example, when there is an opening in the outer wall, the strength as a structural member is low, so an approximate opening position is set.

  Data relating to such a shape can be created, for example, by specifying a desired shape or opening position of each floor along the grid with the input means 2 such as a mouse on an input screen provided with a grid. It is also possible to input a corner coordinate input from a keyboard or a plan view read by a scanner.

  Furthermore, data can be easily created by arranging a unit space such as a building unit in which the purpose of each room or facility is designated by the input means 2.

  For example, when a building is constructed by connecting a plurality of building units, by setting the arrangement pattern of the building units, the shape data of each floor, the positions of the pillars, and the like are relatively set. That is, by setting the position where each building unit is arranged, the planar shape and the positions of the columns and beams constituting the building unit in the entire building are set.

  In addition, since the shape (size) and material (strength) of the pillars and beams of each building unit can be changed depending on how the building units are arranged and whether or not there is a cantilever balcony, data corresponding to such conditions is stored in the plan database. Can be created in advance and stored in the storage means 3, and data designated at the time of setting can be read.

  For example, as data for a building unit that has a frame structure in which a plurality of columns and beams that are horizontally mounted above and below are joined, a plurality of combinations of column shapes (sections) and beam shapes (sections) are stored. I can keep it. This combination can also be made for each material.

  Furthermore, when storing such combinations of columns and beams, usable combinations of columns and beams are selected according to design conditions such as how to arrange and stack building units and load conditions, and are stored in the storage means 3. I can keep it.

  When selecting combinations of columns and beams according to this design condition, the stress generated in each member due to the horizontal load applied to the building will be within the allowable stress level, and the horizontal displacement will be below the allowable value (for example, between layers It is necessary to perform a structural calculation in which a horizontal load at which any one of the two conditions of the deformation angle is h / 120 or less and h is the height of the building unit) is set as an allowable horizontal shear force.

  In this structural calculation, the combination of columns and beams can be selected so that the allowable horizontal shear force is always determined by the horizontal displacement. That is, in the combination of columns and beams selected by this selection method, the stress generated in each member before the horizontal displacement reaches the allowable value does not exceed the allowable stress level.

  If you use building unit data (plan database) in which combinations of columns and beams that can be used according to design conditions are selected, the stress generated in each member when designing the entire building is the allowable stress level. There is no need to check that it fits below, and the calculation can be simplified.

  Furthermore, when a building unit is reinforced with a middle pillar or ladder-like reinforcing material, the data can also be set as shape data or material data.

  The opening position can also be set by selecting the position and size from the plan database stored in the storage means 3. For example, on the input screen of the program displayed on the monitor, the input means 2 can be selected from a plurality of data stored in the storage means 3, or data used for structural design can be directly input from the input means 2. can do.

  Then, according to the data set in the design condition setting means 41 and the building data setting means 42 in this way, the required wall quantity calculating means 43 calculates the required wall quantity in a predetermined direction of the building (for example, two orthogonal directions). The

  The calculation of the required amount of walls is performed separately for earthquake and wind resistance.

  The required amount of walls for earthquake resistance is calculated by multiplying the floor area of each floor by the wall coefficient. The floor area of each floor can be calculated from the planar shape surrounded by the outer wall of each floor set by the building data setting means 42.

  The wall coefficient varies depending on the number of floors, the number of floors, whether it is a heavy building or a light building, etc., so that the wall coefficient is calculated for each condition in advance and the data is stored in the storage means 3. I can keep it.

  Further, since the floor area and wall coefficient differ depending on how the atrium part, rooftop balcony, cantilever balcony, outer staircase, elevator, solar panel, etc. are considered in the design, in the design condition setting means 41 Incorporate the set design conditions and calculate the required amount of walls for earthquake resistance.

  In addition, the necessary wall amount for wind resistance is calculated by multiplying the found area calculated from the side surface shape on which the wind pressure acts on each floor and roof by the wall coefficient for wind pressure. In the integration of the found area, the area of the outer wall from the floor surface of each floor to a predetermined height can be excluded. Furthermore, since the wall coefficient varies depending on the region, the design conditions set in the design condition setting means 41 are taken in and the necessary wall amount for wind resistance is calculated.

  Here, in the case of the design of a building constructed by a plurality of building units, numerical values serving as an accumulation area accumulation criterion are calculated in advance from the shape of the building unit and the shape of the roof unit, and the data is stored in the storage unit 3. It can be stored in and used at the time of design.

  Also, if the center of gravity of the building is deviated from the center of gravity, the building is deformed while twisting, so that a building with a large eccentricity may be subjected to a greater load than a small building. For this reason, the actual required wall quantity corrected by increasing the required wall quantity by the magnitude of the eccentricity or the like can be calculated and used for the design. Details of the method for calculating the actual required wall amount will be described later.

  Furthermore, if there is a unit in the building where the allowable value of horizontal displacement is small compared to other building units (for example, the interlayer deformation angle is h / 150 or less), correct it by increasing the required wall amount. Can do.

  On the other hand, the wall amount conversion means 44 converts a member that can be included as a wall amount among the members that become the structure of the building, such as columns, beams, and outer walls, into the wall amount in the same manner as the load-bearing wall. That is, a member that can be included as a wall amount in the structural member and how much the wall amount is to be converted when included are determined in advance and stored in the storage means 3 as member data.

  Then, from the member data set by the building data setting means 42, members that can be included as wall quantities are extracted and converted into wall quantities by the wall quantity conversion means 44. Details of the conversion means will be described later.

  In addition, the effective wall amount calculating means 45 integrates the wall amount that effectively functions as a structural member of the building in each direction of each floor of the building (for example, the X direction and the Y direction orthogonal to each other). That is, the wall amount is calculated by integrating the numerical values converted into the wall amount by the wall amount conversion means 44 in each direction.

  If a bearing wall that does not need to be converted into a wall amount is arranged, it can be included in the effective wall amount calculating means 45 as it is. Here, the load-bearing wall refers to a wall that has a greater load-bearing capacity than ordinary walls by using bracing or ladder-like reinforcing materials, or by using highly rigid wall materials such as structural plywood. . The load-bearing wall can be estimated to have a larger amount of wall than a normal wall by multiplying by the wall magnification set by laws and regulations.

  Further, the determination unit 46 determines whether or not the effective wall amount calculated by the effective wall amount calculation unit 45 exceeds the necessary wall amount calculated by the necessary wall amount calculation unit 43. That is, if the value obtained by dividing the effective wall amount by the required wall amount is 1 or more, it can be said that this building is a building having a strength satisfying the structural class set in the design conditions.

  Next, the processing flow of the building structural design support system 1 according to the present embodiment will be described with reference to the flowcharts of FIGS. 2 to 4 and FIGS. 5 to 9 showing specific examples.

  Here, FIG. 5 is a perspective view of the building unit 60 constituting the unit building 6 as a building for structural design. FIG. 6A shows the building units 61 and 62 similar to the building unit 60 in the horizontal direction. FIG. 6B is a plan view of the second floor below. FIG.

  As shown in FIG. 5, the building unit 60 includes four pillars 601,... Arranged at four corners, ceiling beams 602,. A main structural member is a rigid frame structure 600 as a frame structure composed of floor beams 603,.

  A plurality of small beams 604,... Are bridged between the floor beams 603, 603 at a predetermined interval, and there are four sheets between the front columns 601, 601 in FIG. .. Are arranged for attaching the outer wall panels 65,... Are all non-structural members.

  On the other hand, FIG. 2 is a flowchart showing a schematic processing flow of the structural design support system 1.

  First, the structural design support system 1 is activated, and a house name, a house code, etc. for identifying the unit building 6 to be calculated are input by the input means 2.

  Then, in accordance with the display on the monitor, the design conditions are input by operating the input means 2 such as a keyboard and a mouse (step S1).

  For example, numerical values such as the amount of snow, the reference wind speed, and the earthquake coefficient are input from the input means 2 in consideration of the area where the unit building 6 is constructed. When inputting the design conditions, various data stored in the storage means 3 such as a hard disk can be fetched under the control of the design condition setting means 41 of the arithmetic unit 4 in response to an instruction from the input means 2. Further, the structural grade required by the designer for the unit building 6 is input from the input means 2.

  Subsequently, in step S2, roof data such as the shape of the roof, shape data such as the planar shape of each floor, opening data such as the position and shape of the opening, and outer wall data such as the material and shape of the outer wall panel 65 are input.

  For example, a plurality of types of building units 60 stored in the storage means 3 are displayed on a monitor, a desired one is selected from among them, and one floor is provided for each floor within the area of the site where the unit building 6 is constructed. Building units 61,... On the second floor are arranged. The lower roof unit 64 and the roof unit 63 also select desired types of units and arrange them at predetermined positions.

  When the units 61-64 are arranged in this way, the shape data related to them and the position data and material data such as the columns 601 and beams 602 and 603 are read from the plan database of the storage means 3 as building data. Is set. Here, the shape data and material data of the column 601 and the beams 602 and 603 may be arbitrarily selected by a pull-down menu or the like.

  For example, if the combination of the column 601 and the beams 602 and 603 is a combination in which the allowable horizontal shear force is determined by the allowable value of the horizontal displacement, the stress generated in each member is the allowable stress as long as these combinations are selected. It is not necessary to check whether it is within the limits.

  In addition, in the case of taking into account the design in units of rectangular frames (frames) constituted by the columns 601 and 601 on both sides and the beams 602 and 603 that are spanned above and below, the strength of the entire frame, etc. Is set.

  And after arrange | positioning facilities, such as a room layout and a toilet and a bathroom, in the plane area | region formed with the building units 61 and 62 of each floor, the outer wall panel 65 is arrange | positioned and outer wall data and opening data are set.

  Here, when the outer wall panel 65 is disposed, the material of the outer wall, the type of opening, the shape of the opening, and the like are designated. For example, as the material of the outer wall, tile, hard wood cement board, etc. can be specified, and the unit weight, strength, etc. of the specified material are set. In addition, as a kind of opening, a waist high window, a sweep window, a ground window, a smoke exhaust window, a front door, a doorway, and the like can be designated, and the position and size are also set.

  Then, the structure calculation is performed in step S3, and the output based on the calculation result is performed from the output means 5 in step S4. Here, the details of the structure calculation in step S3 will be described with reference to the flowchart of FIG.

  First, when calculating the required wall amount by this structural calculation, as shown in FIG. 6A, the unit building 6 is disassembled in the height direction, and the roof (RF), the second floor (2F above) ) Calculation is performed below the second floor (2F below) and above the first floor (1F above). FIG. 6B shows a plan view below the second floor (below 2F).

  Then, the coordinates of the column positions at each height are calculated from the building data, and the axis directions of the two orthogonal directions (X direction and Y direction) of the building are calculated (step S31).

  A plurality of these axis directions are calculated in each direction. As shown in FIG. 6B, at the height of “2F down”, there are three X directions (X [1] −X [3] ), And three directions (Y [1] −Y [3]) of the Y direction are calculated.

  Subsequently, the rigidity of the horizontal surface is determined. Here, it is determined whether the horizontal force can be resisted as a whole beam on the roof, the second floor, and the like.

  For example, the floor amount of the unit building 6 is calculated from the building data set by the building data setting means 42 and compared with the required floor amount calculated in advance, The floor which does not satisfy the required floor space is determined as “there is no horizontal structural rigidity”.

  Then, as shown in FIG. 3, the required wall amount for earthquake resistance is calculated in step S32, and the required wall amount for wind resistance is calculated in step S33.

  The calculation of the required amount of walls for earthquake resistance is performed in units of 61-64 units at each height, taking into account the load conditions such as the weight of the roof, the presence of solar panels and elevators, the presence of cantilever balconies, etc. Aggregate units along the axis.

  For example, as shown in FIG. 6B, the required wall amounts are displayed at the four corners that are the loading points of the units 62, 62, 64, 64, and X [1] -X [3], Y [ 1] -Y [3] is added to the required wall amount.

  Further, even if the vertical coordinates are different from each other, if they are close and can be regarded as the same, they are regarded as the same axis and the transmission load from above is considered. That is, when calculating the required wall amount on each floor from the calculation results for each height, for example, if the required wall amount is on the first floor, it is an integration of “RF + 2F + 2F ++ 1F” for each axis. For the required wall amount, the sum of “on RF + 2F” for each axis is obtained.

  Furthermore, since the seismic force differs depending on the number of floors and floors, when calculating the required wall quantity for earthquake resistance, the required wall quantity on each floor is corrected by the distribution coefficient β or the like.

  On the other hand, calculation of the necessary wall amount for wind resistance is also carried out in units of 61-64 units at each height, taking into account the load conditions such as the weight of the roof, the presence of solar panels and elevators, the presence or absence of a cantilever balcony, Aggregate the units along each axis. It should be noted that when calculating the required wall amount for wind resistance of each floor, there are a required wall amount that does not propagate downstairs and a required wall amount that propagates downstairs.

  After calculating the necessary wall amount in this way, in step S34 and step S35, conversion to the wall amount of the structural member other than the bearing wall and calculation of the effective wall amount are performed.

  FIG. 7A is a plan view showing the effective wall amount of the first floor (1F) of the unit building 6, and FIG. 7B shows a calculation table of the effective wall amount of “1F”.

  For example, the column 601, the beams 602, 603 and the outer wall panel 65 of the building unit 61 can be converted into wall quantities as structural members, and therefore, are assigned side identification numbers (Y111, Y112, Y121,...) That define their positions. The amount of wall is calculated in units.

  Here, in the effective wall amount calculation table of FIG. 7B, the side identification numbers are displayed in the A1 column, and the column beam codes that define the types of the cross sections and materials of the columns 601 and the beams 602 are displayed in the A2 column.

  This column beam code is a code for specifying a combination of the column 601 and the beams 602 and 603. That is, the combination of the material and the cross section of the column 601 and the beams 602 and 603 used in the building unit 60 is determined in advance, and the material and the cross section of the column 601 and the beams 602 and 603 are specified by this column beam code. can do.

  For example, here, when a horizontal load is applied to the unit building 6, not the combination selected under the condition that the stress generated in each member is equal to or less than the allowable stress level, but the allowable horizontal shear force depends on the horizontal displacement allowable value. A material and a cross section are specified from the determined combination of the column 601 and the beams 602 and 603.

  In addition, a description specifying the width, the type and size of the opening, and the position of the outer wall panel 65 in the A3 row, a reduction factor for reducing the effective wall amount collected in the A4 row, and an effective wall of the primary design in the A5 row The effective wall amount of the secondary design is displayed in the column A6.

  In addition, when an interlayer deformation angle is set to h / 120 or less as an allowable value of horizontal displacement of a general building unit constituting the unit building 6, the allowable value of horizontal displacement is small in some units such as an entrance unit ( For example, if there is one with an interlayer deformation angle of h / 150 or less, the reduction factor d = (h / 120) / (h / 150) is calculated, and the deformation of the unit having a small allowable horizontal displacement is affected. When calculating the effective wall amount of the building unit, the reduction factor d can be multiplied.

  Here, the primary design is, for example, the design based on seismic force when the standard shear force coefficient Cd as defined in the Building Standards Act is 0.2, and the secondary design is, for example, an earthquake that has the required retained horizontal strength as defined in the Building Standards Act. Design by force.

  In the present embodiment, it is evaluated whether or not the unit building 6 satisfies the desired performance in two stages of the primary design stage and the secondary design stage.

  When calculating the effective wall amount, a value obtained by integrating the converted wall amount (A51 row, A61 row) of the outer wall panel 65 and the converted wall amount (A52 row, A62 row) of the frame, Effective wall amount (A53 row, A63 row). Here, the “frame” refers to a rectangular frame composed of columns 601 and 601 on both sides which are one side of the building units 61 and 62, a ceiling beam 602, and a floor beam 603.

  Such conversion to the wall amount of the outer wall panel 65 or the frame is set in advance for each combination of members to be used. For example, the conversion to the wall amount of the outer wall panel 65 is performed by calculating a conversion value for each height, width, and type of the opening of the outer wall panel 65 and storing it in the storage unit 3. Further, the conversion to the wall amount of the frame is performed by calculating the conversion value for each combination of the material and the cross section of the column 601 and beams 602 and 603 and storing it in the storage means 3.

  Further, when the frame is converted into a wall amount, the frame in which the ceiling beam 602 and the floor beam 603 are partially cut uses the reduced conversion value as the wall amount.

  In the A53 and A63 columns indicating the total of the effective wall amounts, values obtained by multiplying the sum of the converted wall amount of the outer wall panel 65 and the converted wall amount of the frame by the reduction coefficient are displayed.

  The effective wall amount (A53 column) of the primary design of each side identification number (Y111, Y112, Y121,...) Tabulated in this way is the side identification number (A53) in the plan view of FIG. Y111, Y112, Y121,...

  Although the strength of the building can be determined from the necessary wall amount and the effective wall amount calculated as described above (step S36), if the building is eccentric, it will be deformed while twisting. It becomes possible to make a determination closer to the actual structure of the unit building 6 by correcting the amount.

  The eccentricity of the building is a value calculated from the eccentric distance, which is the distance between the center of gravity of the building and the center of gravity. If the eccentricity is large, partial deformation is excessive when a horizontal load such as an earthquake or wind is applied. Therefore, it is desirable to make the determination by correcting the required wall amount to the actual required wall amount. Here, the center of gravity of the building refers to the centroid of the planar shape of the building, and the rigid center refers to the center of the force that opposes the horizontal force.

  Therefore, a method of calculating the actual required wall amount will be described with reference to FIG.

Steps S11 to S14 in FIG. 4 show values that are calculated in advance before the actual required wall amount is calculated. That is, the coordinate (x, y) along the axis in step S11 is calculated in step S31 in FIG. 3, the necessary wall amounts (D _X , D _Y ) in step S12 are calculated in steps S32 and S33, and step S13, The effective wall amount (K _X , K _Y ) in S14 is calculated in Step S35.

And in step S101, it is necessary for each axis (X [1] -X [3], Y [1] -Y [3]) in each direction (X direction, Y direction) in each floor (1, 2nd floor). The center of gravity coordinates (g _X , g _Y ) are calculated from the wall amount (D _X , D _Y ) and the coordinates (x, y) along the axis. When calculating the center of gravity, if the coordinates along the axis of each floor are different, the calculation is performed while maintaining the coordinates along the axis of each floor.

Further, in step S102, as in the above step, the rigid coordinate (l) is obtained from the effective wall amount (K _X , K _Y ) for each axis in each direction of each floor and the coordinates (x, y) for that axis. _X, calculating the _{l Y).}

Subsequently, in step S103, the eccentric distance (e _X , e _Y ) is calculated from the difference between the center of gravity coordinates (g _X , g _Y ) and the rigid center coordinates (l _X , l _Y ).

On the other hand, in step S104, the coordinates (x, y) of the axis are replaced with new coordinates (x ′, y ′) using the coordinates (l _X , l _Y ) of the rigid center as the coordinate origin, and based on that, calculating a torsional rigidity _{K R.}

Further, in step S105, the torsional rigidity _{K R} and effective wall amount _(K X, K _Y) from a resiliently radius _{(r eY,} r _eX) is calculated.

In step S106, the eccentricity (R _eY , R _eX ) obtained by dividing the absolute value of the eccentric distance (e _X , e _Y ) calculated in step S103 by the elastic radius (r _eY , r _eX ) calculated in step S105. ) For each direction (X direction, Y direction).

Further, in step S107, the eccentricity _{(R eY,} R _eX) and the eccentric distance _(e X, e _Y) coordinates of the origin Tsuyoshikokoro (x ', y') from the twist correction coefficient (alpha _Y, α _X ) is calculated. Here, when there is no rigidity of the horizontal surface, the torsion correction coefficient is 1.0 and the eccentricity is 0.0.

In step S108, the actual value for each axis (X [1] -X [3], Y [1] -Y [3]) in each direction (X direction, Y direction) in each floor (1, 2nd floor). The required wall amount (B _Y , B _X ) is calculated from the torsion correction coefficient (α _Y , α _X ), the required wall amount (D _X , D _Y ), and the effective wall amount (K _X , _KY ).

In step S109, the effective wall amount (K _X , K _Y ) is divided by the actual required wall amount (B _Y , B _X ) calculated in this way, and the result is 1.0 or more. Is determined in step S110.

On the other hand, in step S111, the rigidity ratio R _S is calculated. In calculating the rigidity R _S , first, the effective wall amount for each axis (Y [i], X [j],) in each direction (X direction, Y direction) on each floor (1, 2 floor). _(K X, _{K Y)} and the actual required wall weight _(B Y, B _X) and specific than the inverse _{(r Si,} r _Sj) of story drift of seeking, its inverse _{(r Si,} r _Sj) from each floor An average reciprocal number r _S is obtained.

Then, an arithmetic average r _S ′ of the building is obtained from the reciprocal r _S of the interlayer deformation angle of each floor, and the rigidity ratio R _S obtained by dividing the reciprocal r _S of the inter-layer deformation angle by the arithmetic average r _S ′ is expressed in the direction ( X direction and Y direction).

Further, in step S112, each floor (first floor, second floor) each direction (X direction, Y direction) from the minimum value of the shear modulus _{R S} of calculating the _{F S,} and _{F e} determined from the eccentricity _{R e} multiplied To calculate _FeS .

Furthermore, in step S113, the actual required wall amount for the seismic secondary design is calculated. Real need Kaberyou for the seismic secondary design requires wall quantity _(D X, D _Y) is calculated by the product of the the _{F eS.} Here, the actual amount of walls required for the seismic secondary design differs depending on whether the horizontal construction surface such as the floor or the roof has rigidity. That is, if the horizontal surface is rigid, the actual required wall amount is calculated by integrating the axis in each direction.If the horizontal surface is not rigid, the actual required wall amount for each axis is calculated in each direction. Ask.

In step S114, the effective wall amount (K _X , K _Y ) is divided by the actual required wall amount for the seismic secondary design calculated so far, and whether or not the result is 1.0 or more is determined. The determination is made at step S115.

  FIG. 8 shows the test results that are the results of the above calculations. In the B1 column of this test result, the floor (first floor, second floor) of the unit building 6 is shown, each direction (X direction, Y direction) is shown in the B2 column, and the horizontal composition is shown in the B3 column. The presence or absence of rigidity is indicated, and the number of axes in each direction is indicated in the B4 column.

  In addition, each numerical value that is the basis for calculating the primary design is shown in column B5, each numerical value that is the basis for calculating the secondary design for earthquake resistance is shown in column B6, and each direction of each floor is shown in column B7. An evaluation that is a determination result is shown.

  The B5 column indicating the primary design is divided into a B51 column indicating the effective wall amount, a B52 column for earthquake resistance, and a B53 column for wind resistance. And about earthquake resistance and wind resistance, necessary wall amount (B521 row, B531 row), torsional correction coefficient (B522 row, B532 row), actual required wall amount (B523 row, B533 row), effective wall amount and actual required wall The ratio of the quantity (B524 column, B534 column) and the evaluation of the ratio (B525 column, B535 column) are shown.

Further, in the B6 column of the secondary design, the effective wall amount is shown for each axis in the B61 column, the eccentricity for each direction is shown in the B62 column, the rigidity is shown in the B63 column, and _Fes , B65 in the B64 column. The actual required wall amount is shown in the row, and the ratio of the effective wall amount and the actual required wall amount is shown in the B66 row.

  Based on such a test result, a determination result as shown in FIG. 9 is output (see step S4 in FIG. 2).

  In the determination result shown in FIG. 9, each floor (first floor C11, second floor C12) of the unit building 6 is displayed in the C1 column, and the examination result of the earthquake C2 and the wind C3 is displayed for each floor. The study results of earthquake C2 are divided into primary design C21 and secondary design C22, and the effective wall quantity and required wall quantity (here) in C5 column for each direction (X direction, Y direction) specified in C4 column Then, the ratio to the actual required wall amount) is displayed, and if the ratio is 1.0 or more, the determination in the C6 column is displayed as “◯ (circle)”.

  Next, the operation of the structural design support system 1 of the present embodiment will be described.

  The building structural design support system 1 according to the present embodiment configured as described above includes a wall amount conversion means 44 that replaces the frame or outer wall panel 65 formed of the columns 601 and beams 602 and 603 with wall amounts. Yes.

  For this reason, it is possible to accurately evaluate the structural member other than the load bearing wall as a member contributing to the performance of the unit building 6 by using a simple design method of integrating the wall amount.

  In addition, when the unit building 6 is an assembly of building units 60 whose main structure is the ramen structure 600, it is possible to design by the amount of walls and to incorporate them as conventional structural members such as the outer wall panel 65. It is possible to carry out a design that also takes into account the parts that were not.

  Furthermore, by calculating the eccentricity of the unit building 6 and correcting the necessary wall amount based on the eccentricity, it is possible to perform an accurate design that matches the actual structure.

  In addition, a combination of the columns 601 and beams 602 and 603 calculated based on the horizontal displacement for each design condition is stored in the storage means 3, and if the combination is used, even a building with a skeleton structure is used. It is not necessary to check the allowable stress level for the entire unit building 6, and the calculation can be simplified.

  That is, if the design condition is set by the design condition setting unit 41 and the combination of the column 601 and the beams 602 and 603 fetched from the storage unit 3 based on the set design condition, the allowable value of the horizontal displacement is reached. The stress of each member does not exceed the allowable stress level before, and it is not necessary to check the allowable stress level.

  Although the best embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are possible. Are included in the present invention.

  For example, in the above-described embodiment, the case where the present invention is applied to the unit building 6 that is an assembly of the building units 60 whose main structure is the ramen structure 600 has been specifically described. However, the present invention is not limited to this. It can also be applied to conventional wooden buildings.

It is the block diagram which showed the structure of the structural design support system of the best embodiment of this invention. It is the flowchart which showed the flow of the outline process of the structural design support system of the best embodiment of this invention. It is the flowchart which showed the flow of the process of the structural calculation of a structural design support system. It is the flowchart which showed the flow of the process until the calculation method and determination of an actual required wall quantity. It is a perspective view explaining the structure of a building unit. (A) is a side view explaining the structure of the unit building to design, (b) is a top view in the height under the 2nd floor of the unit building. (A) is a plan view of the first floor on which the effective wall amount is displayed for each side, and (b) is a calculation table illustrating the effective wall amount on the first floor for each side. It is a table | surface of the test result which illustrated each numerical value used as the calculation basis of primary design and secondary design. It is the list which outputted collectively the judgment result of the strength of a unit building.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Structural design support system 2 Input means 3 Storage means 4 Calculation part 41 Design condition setting means 42 Building data setting means 43 Necessary wall quantity calculation means 44 Wall quantity conversion means 45 Effective wall quantity calculation means 46 Judgment means 5 Output means 6 Unit building (building)
60 Building unit 600 Ramen structure (frame structure)
601 Column 602 Ceiling beam 603 Floor beam 65 Exterior wall panel

Claims (3)

Design condition setting means for setting an acting load used for structural design of a unit building constituted by a plurality of building units by taking in from at least one of the input means and the storage means;
This is a combination of a column and a beam whose cross section is specified for the material and section of a building unit that has a frame structure that joins multiple columns and beams that are horizontally mounted above and below, and calculated based on the horizontal displacement for each design condition. Storage means for storing building unit data of a combination of a pillar and a beam,
And data of the building units to be taken from the storage means, at least one taken from write Murrell roof data, each floor shape data, aperture data, building data set for setting an outer wall data and member data of the input means and storage means Means,
Based on the setting of the design condition setting means and the building data setting means, the required wall quantity calculating means for calculating the required wall quantity for each predetermined direction of the unit building;
Based on the setting of the building data setting means, wall amount conversion means for replacing a member other than the load-bearing wall with a wall amount;
Effective wall quantity calculating means for calculating an effective wall quantity for each direction of the unit building including the wall quantity converted by the wall quantity converting means;
A unit building structural design support system comprising: a determination unit that determines the strength of the unit building based on the required wall amount and the effective wall amount. It said unit building is provided with a wall panel attached to the front Symbol frame structure,
The structural design support system for a unit building according to claim 1, wherein the wall amount conversion means replaces the frame structure and the wall panel with wall amounts. The structural design support of a unit building according to claim 1 or 2, further comprising a necessary wall amount correcting means for calculating an eccentricity rate of the unit building and correcting the required wall amount based on the eccentricity rate. system.

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