JP7334129B2 - Building construction method, building reinforcement structure and column base - Google Patents

Description

The present invention relates to a building construction method and a building reinforcement structure using precast concrete columns, and a column base using precast concrete.

Installation jigs with gusset plates for attaching damper braces, which are members for seismic control, are installed at the upper end of the column and the lower end of other columns, and damper braces are installed across these installation jigs Building reinforcement There is a structure (Patent Document 1).

JP-A-2003-34988

However, there are many stud bolts and fixing bars protruding inside the mounting jig with the gusset plate, and it is complicated and labor-intensive to arrange the main bars, hoop bars, etc. and construct the formwork on site. become more.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a building construction method, a building reinforcement structure, and a column base that can simplify the work on site and reduce the number of man-hours.

[1] One aspect of the building construction method according to the present invention is
A column-to-beam joint that joins a column and a beam, a first column that is joined on the column-to-beam joint, and a damper that spans diagonally between a second column that is adjacent to the first column. A method of constructing a building comprising a brace,
A metal column winding plate that constitutes the outer peripheral surface of the column base, a metal gusset plate that protrudes from the outer surface of the column winding plate, and a precast concrete construction in which concrete is placed inside the column winding plate. preparing the column base including a concrete portion and a plurality of first through holes and second through holes penetrating from the upper surface to the lower surface of the concrete portion;
preparing a precast concrete upper column body having a plurality of connecting holes opening at positions corresponding to the plurality of first through holes;
installing the column base above the beam-to-column joint by inserting each of the plurality of reinforcing bars extending upward from the beam-to-column joint into the plurality of first through holes, respectively;
A filler is injected from the upper end of the second through hole, and the gap between the column base and the column-beam joint and the gap between the reinforcing bar and the first through hole are filled with the filler to form the column. Integrating the leg and the beam-to-column joint,
installing the upper column above the column base by inserting the upper ends of the plurality of reinforcing bars into the plurality of connection holes, respectively;
A gap between the reinforcing bar and the connecting hole and a gap between the upper column and the column base are filled with a filler to integrate the upper column and the column base to form the first column. form,
One end of the damper brace is attached to the gusset plate to join the first column and the damper brace.

[2] One aspect of the reinforcing structure of a building according to the present invention is
A column-to-beam joint that joins a column and a beam, a first column body that is joined on the column-to-beam joint, and the first
A reinforcing structure for a building, comprising: a damper brace diagonally spanned between a column and an adjacent second column,
The first pillar is
A metal column winding plate that constitutes the outer peripheral surface of the column base, a metal gusset plate that protrudes from the outer surface of the column winding plate, and a precast concrete construction in which concrete is placed inside the column winding plate. the column base including a concrete portion and a plurality of first through holes and second through holes penetrating from the upper surface to the lower surface of the concrete portion;
An upper column made of precast concrete integrated with the column base by incorporating a plurality of reinforcing bars projecting from the upper surface through the first through holes from the column-to-beam joint below the column base. and,
with
a damper brace joined at one end to the gusset plate;
Between the column base and the beam-to-column joint, between the first through hole and the reinforcing bar, and between the first through hole and the filler filled in the second through hole, the column base and the beam to column joint are separated. characterized by being integrated.

[3] One aspect of the column base according to the present invention is
A metal column winding plate fixed with a gusset plate to which one end of the damper brace can be joined;
A concrete part made of precast concrete placed inside the column winding plate;
a plurality of first through holes and second through holes penetrating from the upper surface to the lower surface of the concrete portion;
with
The plurality of first through holes are arranged along the column winding plate,
The second through hole is arranged near the center of the upper surface and the lower surface.

[4] In one aspect of the column base,
The first through hole is formed by a sheath pipe embedded in the concrete portion,
The sheath tube that does not have an opening on the side can be used.

According to the present invention, by using a column base made of precast concrete, work at a construction site can be simplified and man-hours can be reduced. Furthermore, according to the present invention, it is not necessary to install a through-hole in the column winding plate by providing the second through-hole into which the filler for joining the column base and the reinforcing bar can be injected from the upper surface of the column base. Therefore, the strength of the column winding plate is not lowered. Furthermore, according to the present invention, the confining effect of the column winding plate contributes to the improvement of the structural strength of the precast concrete column base.

1 is a framing diagram of a building with a reinforcing structure according to an embodiment of the invention; FIG. 1 is a side view of a reinforcement structure according to an embodiment of the invention; FIG. It is sectional drawing which expands and shows a part of reinforcement structure which concerns on one Embodiment of this invention. It is a sectional view of a column base concerning one embodiment of the present invention. It is a top view of the column base concerning one embodiment of the present invention. It is a sectional view of the upper column concerning one embodiment of the present invention. 1 is a flowchart of a building construction method according to an embodiment of the present invention; It is a schematic diagram explaining the process of installing a column base. It is a schematic diagram explaining the process of installing an upper column above a column base. It is a schematic diagram explaining the process of forming a 1st columnar body.

Preferred embodiments of the present invention will be described in detail below with reference to the drawings. It should be noted that the embodiments described below do not unduly limit the scope of the invention described in the claims. Moreover, not all the configurations described below are essential constituent elements of the present invention.

1. Building Reinforcement Structure A reinforcement structure 10 for a building 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. FIG. 1 is a frame view of a building 1 having a reinforcing structure 10 according to one embodiment of the present invention, FIG. 2 is a side view of the reinforcing structure 10 according to one embodiment of the present invention, and FIG. It is a sectional view expanding and showing a part of reinforcement structure 10 concerning one embodiment of the invention. In FIG. 3, the portion filled with the filler is indicated by hatching.

As shown in FIG. 1, the reinforcing structure 10 of the building 1 according to the present embodiment includes a beam-to-column joint 8 that joins a column (first column 2, second column 4) and a beam 7, and a column-to-beam joint A first column 2 joined on the part 8 and a damper brace 6 diagonally spanning between the first column 2 and the adjacent second column 4 are provided. The reinforcement structure 10 can be provided at multiple locations in the building 1 .

As shown in FIGS. 2 and 3, the first column 2 includes a column base 20 arranged above the beam-to-column joint 8, an upper column 30 arranged above the column base 20, Prepare. The column-to-beam joint 8 and the column base 20 are joined, and the column base 20 and the upper column 30 are joined to form one first column 2 fixed on the column-to-beam joint 8. .

The column base 20 includes a column winding plate 22, a gusset plate 24, a precast concrete portion 26 in which concrete is placed inside the column winding plate 22, and a top surface 260 to a bottom surface 262 of the concrete portion 26. A plurality of first through holes 264 and second through holes 266 are provided. The column winding plate 22 constitutes the outer peripheral surface of the column base 20 . Details of the column base 20 will be described later.

The upper column 30 is made of precast concrete. The upper column 30 is integrated with the column base 20 by incorporating therein a plurality of reinforcing bars 80 projecting from the upper surface 260 through the first through holes 264 from the column-to-beam joint 8 below the column base 20. be done. In the upper column 30 , reinforcing bars 80 extending from the upper surface 260 of the column base 20 are inserted into a plurality of connecting holes 34 opening in the lower surface 32 of the upper column 30 . The lower end of another reinforcing bar 81 hangs down from the upper end of the connecting hole 34, and the connecting hole 34 is filled with filler to fix the reinforcing bar 80 extending from below and the reinforcing bar 81 extending from above. The upper end of the reinforcing bar 81 with its lower end hanging down in the connecting hole 34 protrudes from the upper surface 31 of the upper column 30 and penetrates the beam-to-column joint 8 . 20 extends to the interior. Details of the upper columnar body 30 will be described later.

The second column 4 is positioned adjacent to the first column 2 and is fixed on another adjacent column-to-beam joint 8 . The second column 4 is a precast concrete structure including a metal column winding plate 22 near the upper end of the second column 4 and a metal gusset plate 24 protruding from the outer surface of the column winding plate 22. . The second column 4 includes a plurality of reinforcing bars (not shown) extending upward from the upper surface of the second column 4, and the reinforcing bars penetrate through the beam-to-column joints 8 installed on the second column 4. It extends to the inside of another second column 4 installed further above the beam-to-column joint 8, and the two second columns 4 are integrated with the filler across the beam-to-column joint 8. As shown in FIG.

The beam-to-column joint 8 is a portion that joins together the first column 2 or the second column 4 extending vertically from the beam-to-column joint 8 and a plurality of beams 7 extending horizontally from the beam-to-column joint 8. is. The column-to-beam joint 8 may be made of precast concrete integrated with at least a part of the beam 7 . By adopting the column-to-beam joint 8 made of precast concrete, the on-site casting work is reduced and the work efficiency at the site is improved.

As the filler, a known filler for joining concrete to each other or concrete and reinforcing bars by hardening is used.

The damper brace 6 has one end joined to the gusset plate 24 of the first column 2 and the other end joined to the gusset plate 24 of the second column 4 . The damper braces 6 are arranged in a brace shape between adjacent pillars to exert a damping effect against horizontal vibrations caused by an earthquake or the like. As the damper brace 6, a known damper brace such as a steel damper, a viscoelastic damper, an oil damper, or a friction damper can be used.

In FIG. 3, portions filled with the filler are indicated by hatching. Between the column base 20 and the beam-to-column joint 8, between the first through-hole 264 and the reinforcing bar 80, and by curing the filler filled in the second through-hole 266, the column base and the beam-to-column joint are formed. part is integrated. In addition, the column base 20 and the upper column 30 are joined and integrated by hardening the filler filled between the column base 20 and the upper column 30 and between the connecting hole 34 and the reinforcing bars 80 and 81. to form the first columnar body 2 .

The gusset plate 24 protrudes from the outer surface of the column winding plate 22 . Gusset plate 24 is made of metal.

The building 1 can suppress shaking of the building 1 due to an earthquake by the reinforcement structure 10 having the damper braces 6 . According to the reinforcing structure 10 of the building 1, by using the column base 20 made of precast concrete, it is possible to simplify the work at the site and reduce the man-hours.

1-1. Column Base The details of the column base 20 will be described with reference to FIGS. 4 and 5. FIG. FIG. 4 is a cross-sectional view (IV-IV cross-sectional view in FIG. 5) of the column base 20 according to one embodiment of the present invention, and FIG. 5 is a plan view of the column base 20 according to one embodiment of the present invention. It is a diagram.

As shown in FIGS. 4 and 5, the column base 20 has a substantially rectangular column shape. The column base 20 consists of a metal column winding plate 22 fixed with a gusset plate 24 to which one end of the damper brace 6 (FIG. 3) can be joined, and a precast concrete structure placed inside the column winding plate 22. A concrete portion 26 and a plurality of first through holes 264 and second through holes 266 penetrating from an upper surface 260 to a lower surface 262 of the concrete portion 26 are provided.

The column winding plate 22 has a shape that wraps around the concrete portion 26 except for the upper surface 260 and the lower surface 262, and constitutes the outer peripheral surface of the column base body 20 having a substantially quadrangular prism shape. By configuring in this way, the confined effect of the column winding plate 22 contributes to the improvement of the structural strength of the precast concrete column base 20 . The column-wound plate 22 is made of metal, and can be manufactured, for example, by welding the ends of four steel plates together. The column winding plate 22 may be a form for placing concrete for the concrete portion 26 . The inner peripheral surface of the column winding plate 22 is provided with stud bolts and anchoring bars as disclosed in Patent Document 1. Stud bolts and anchor bars are indicated by dashed lines in FIG. The stud bolt transmits the shear force from the damper brace to the column base 20 (first column 2), and the anchor muscle transmits the tensile force from the damper brace to the column base 20 (first column 2). ).

The gusset plate 24 is a metal fitting for joining the damper brace 6 to the column winding plate 22, and is integrally fixed to the column winding plate 22 by welding or the like. The gusset plate 24 is provided with, for example, a through hole for attaching one end of the damper brace. The configuration of the gusset plate 24 can be set to match the configuration of the damper brace.

The concrete portion 26 is an inner portion of the column winding plate 22 . The concrete portion 26 is a precast concrete structure that is manufactured in advance at a factory or the like, and is manufactured integrally with the column winding plate 22 that constitutes the outer peripheral surface of the concrete portion 26 . A plurality of first through holes 264 and one second through hole 266 are opened in the upper surface 260 and the lower surface 262 of the concrete portion 26 . Inside the concrete portion 26, hoop reinforcement is arranged. The lower surface 262 is a plane facing the column-to-beam joint 8 , and the upper surface 260 is a plane facing the lower surface 32 of the upper column 30 . The upper surface 260 and the lower surface 262 may be formed with small irregularities in order to increase the bonding strength with the opposing surfaces. For example, the concrete surface may be marked with a checker plate or the like.

A plurality of first through holes 264 are arranged near the outer circumference of the concrete portion 26 along the column winding plate 22 . The first through-hole 264 has a diameter that allows the reinforcing bar 80 ( FIG. 3 ), which is the main reinforcing bar of the concrete portion 26 , to pass therethrough and allows the filler to be injected between the reinforcing bar 80 and the first through hole 264 . The first through hole 264 is formed by the sheath tube 28 embedded in the concrete portion 26 . For the sheath tube 28 (36) used in this embodiment, for example, a known metal or synthetic resin tubular body can be used. It is preferable that the sheath tube 28 does not have an opening on the side surface of the sheath tube 28 . This is because the column-wound plate 22 is located on the side of the sheath tube 28, and if the column-wound plate 22 is provided with a through hole, the strength of the column-wound plate 22 will be lowered.

The second through hole 266 is preferably located near the center of the upper surface 260 and the lower surface 262 . The second through-holes 266 are for injecting the filler from the opening of the upper surface 260 as shown by the arrows in FIG. , and filled into each first through hole 264 . Therefore, by arranging the second through holes 266 near the center of the upper surface 260 and the lower surface 262, all of the first through holes 264 arranged along the column winding plate 22 constituting the outer peripheral surface are substantially evenly filled. agent is filled. The second through-hole 266 can be formed by the sheath tube 28 embedded in the concrete portion 26 similarly to the first through-hole 264 . The first through-hole 264 and the second through-hole 266 have circular cross-sectional shapes. According to the column base 20, the side surface of the column winding plate 22 is provided with the second through-hole 266 into which the filler for joining the column base 20 and the reinforcing bar 80 can be injected from the upper surface 260 of the column base 20. Since no opening is required, the strength of the column winding plate 22 is not lowered.

1-2. Upper Column Body Details of the upper column body 30 will be described with reference to FIG. FIG. 6 is a cross-sectional view of the upper column 30 according to one embodiment of the invention.

As shown in FIG. 6, the upper column 30 is a concrete block made of precast concrete and having a substantially quadrangular prism shape. The outer circumference of the upper column 30 is substantially equal to the outer circumference of the column base 20 . The upper column 30 includes a plurality of reinforcing bars 81 extending upward from the upper surface 31 of the upper column 30 and extending into the upper column 30, a plurality of connecting holes 34 opening in the lower surface 32 of the upper column 30, Prepare. The plurality of connecting holes 34 are opened at positions corresponding to the plurality of first through holes 264 .

The connecting hole 34 has a cylindrical shape with an inner diameter larger than the diameter of the reinforcing bar 80 , the lower end being open to the lower surface 32 and the upper end being closed. The lower end of the reinforcing bar 80 protrudes into the connecting hole 34 from the upper end of the connecting hole 34 and extends to the middle of the connecting hole 34 . Each connecting hole 34 communicates with the side opening of the upper column 30 near its upper end and near its lower end. The connecting hole 34 is formed by a joint 36 embedded in the upper column 30 . As the joint 36, a known precast mortar-filled joint can be adopted. The joint 36 is tubular and can receive the reinforcing bars 80 and 81 from both ends, and can join the reinforcing bars together by filling the gaps between the reinforcing bars 80 and 81 with mortar.

By making the upper column 30 of precast concrete construction, it is possible to reduce man-hours at the site, leading to shortening of the construction period.

2. Building Construction Method A building construction method according to the present embodiment will be described with reference to FIGS. 4 to 10. FIG. FIG. 7 is a flow chart of a method for constructing a building 1 according to an embodiment of the present invention, FIG. 8 is a schematic diagram explaining the step (S12) of installing a column base 20, and FIG. It is a schematic diagram explaining the step (S16) of installing the upper column 30 above the leg 20, and FIG. 10 is a schematic diagram explaining the step (S18) of forming the first column 2. As shown in FIG.

The construction method of the building 1 according to the present embodiment includes, as described with reference to FIG. A construction method for a building 1 comprising a first column 2 joined on a beam joint 8 and a damper brace 6 diagonally spanning between the first column 2 and a second column 4 adjacent to the first column 2. is.

As shown in FIG. 7, the construction method of the building 1 includes a step of preparing a column base (S10), a step of preparing an upper column (S11), a step of installing a column base (S12), The step of integrating the column base and the beam-to-column joint (S14), the step of installing the upper column above the column base (S16), and the step of forming the first column (S18); and a step of joining the damper brace (S20). Each step will be described below in sequence.

S10: The step of preparing the column base 20 prepares the column base 20 shown in FIGS. In the step of preparing the column base 20 (S10), hoop bars are arranged on the column winding plate 22 with the gusset plate 24 manufactured by an iron factory or the like, and the sheath tube 28 is fixed. Concrete is placed in the The precast column base 20 is transported to the building 1 construction site.

S11: In the step of preparing the upper column 30, prior to S16, the upper column 30 shown in FIG. 6 is prepared in advance. In the step (S11) of preparing the upper pillar 30, the reinforcing bars 81 and the hoop bars, which are the main reinforcing bars, are placed in a formwork (not shown) and the joints 36 are fixed, and then concrete is placed inside the formwork. An opening communicating with the joint 36 is formed in the side surface of the upper column 30 . The precast upper column 30 is transported to the building 1 construction site.

S12: As shown in FIG. 8, in the step of installing the column base 20, at a construction site, the column base 20 suspended by a wire or the like is attached to a plurality of reinforcing bars 80 extending upward from the beam-to-column joint 8. are respectively inserted into the plurality of first through holes 264 and installed above the column-to-beam joint 8 . A predetermined gap is formed between the column base 20 and the column-to-beam joint 8 via a spacer (not shown), and a frame (not shown) is installed around the gap to prevent leakage of the filler.

S14: As shown in FIG. 8, in the step of integrating the column base 20 and the column-to-beam joint 8, after S12, the filler is injected from the upper end of the second through hole 266 in the direction of the arrow in the drawing. Then, the gap between the column base 20 and the column-to-beam joint 8 and the gap between the reinforcing bar 80 and the first through hole 264 are filled with the filler. After the filler hardens, the frame placed around the gap is removed and S16 is executed.

S16: As shown in FIG. 9, in the step of installing the upper column 30 above the column base 20, after S14, the upper column 30 suspended by a wire or the like is attached to the upper ends of the plurality of reinforcing bars 80. are inserted into the plurality of connecting holes 34 and installed above the column base 20 . In FIG. 9, the cured filler is indicated by hatching. A predetermined gap is formed between the upper column 30 and the column base 20 via a spacer (not shown), and a frame (not shown) is installed around the gap to prevent leakage of the filler.

S18: As shown in FIG. 10, in the step of forming the first column 2, after S16, the gaps between the reinforcing bars 80, 81 and the connecting holes 34 and the gaps between the upper column 30 and the column base 20 are The first column 2 is formed by filling the filler and integrating the upper column 30 and the column base 20 . The filler is injected from the side opening near the lower end of the upper columnar body 30 toward the vicinity of the lower end of the connecting hole 34 in the direction of the arrow in the figure. In FIG. 10, the cured filler is indicated by hatching.

S20: As shown in FIG. 10, one end of the damper brace 6 is attached to the gusset plate 24 to join the first column 2 and the damper brace 6 together. The damper brace 6 is spanned between the second column 4 (not shown). Prior to S20, the second column 4 precast integrally with the column winding plate 22 is transported to the construction site and fixed on the beam-to-column joint 8 adjacent to the first column 2.

According to the construction method of the building 1, the reinforcing structure 10 of the building 1, and the column base 20 according to the present embodiment described above, the use of the precast concrete column base 20 simplifies on-site work and reduces man-hours. can be reduced. Furthermore, according to the construction method of the building 1, the reinforcing structure 10 of the building 1, and the column base 20 according to the present embodiment, the filler for joining the column base 20 and the reinforcing bars 80 is applied to the upper surface of the column base 20. By providing the second through hole 266 through which injection can be performed from 260, the strength of the column winding plate 22 is not reduced.

The present invention is not limited to the above-described embodiments, and various modifications are possible. For example, the present invention includes configurations that are substantially the same as the configurations described in the embodiments (for example, configurations that have the same function, method, and result, or configurations that have the same purpose and effect). Moreover, the present invention includes configurations in which non-essential portions of the configurations described in the embodiments are replaced. In addition, the present invention includes a configuration that achieves the same effects or achieves the same purpose as the configurations described in the embodiments. In addition, the present invention includes configurations obtained by adding known techniques to the configurations described in the embodiments.

DESCRIPTION OF SYMBOLS 1... Building, 2... 1st column, 4... 2nd column, 6... Damper brace, 7... Beam, 8... Column-to-beam joint, 10... Reinforcing structure, 20... Column base, 22... Column winding plate , 24... Gusset plate 26... Concrete portion 260... Upper surface 262... Lower surface 264... First through hole 266... Second through hole 28... Sheath tube 30... Upper column body 31... Upper surface 32... Lower surface 34 ... Connection hole 36 ... Joint 80, 81 ... Rebar

Claims (4)

A column-to-beam joint that joins a column and a beam, a first column that is joined on the column-to-beam joint, and a damper that spans diagonally between a second column that is adjacent to the first column. A method of constructing a building comprising a brace,
A metal column winding plate that constitutes the outer peripheral surface of the column base, a metal gusset plate that protrudes from the outer surface of the column winding plate, and a precast concrete construction in which concrete is placed inside the column winding plate. preparing the column base including a concrete portion and a plurality of first through holes and second through holes penetrating from the upper surface to the lower surface of the concrete portion;
preparing a precast concrete upper column body having a plurality of connecting holes opening at positions corresponding to the plurality of first through holes;
installing the column base above the beam-to-column joint by inserting each of the plurality of reinforcing bars extending upward from the beam-to-column joint into the plurality of first through holes;
A filler is injected from the upper end of the second through hole, and the gap between the column base and the column-beam joint and the gap between the reinforcing bar and the first through hole are filled with the filler to form the column. Integrating the leg and the beam-to-column joint,
installing the upper column above the column base by inserting the upper ends of the plurality of reinforcing bars into the plurality of connection holes, respectively;
A gap between the reinforcing bar and the connecting hole and a gap between the upper column and the column base are filled with a filler to integrate the upper column and the column base to form the first column. form,
A method of constructing a building, wherein one end of the damper brace is attached to the gusset plate to join the first column body and the damper brace. A column-to-beam joint that joins a column and a beam, a first column that is joined on the column-to-beam joint, and a damper that spans diagonally between a second column that is adjacent to the first column. A building reinforcement structure comprising braces and
The first pillar is
A metal column winding plate that constitutes the outer peripheral surface of the column base, a metal gusset plate that protrudes from the outer surface of the column winding plate, and a precast concrete construction in which concrete is placed inside the column winding plate. the column base including a concrete portion and a plurality of first through holes and second through holes penetrating from the upper surface to the lower surface of the concrete portion;
An upper column made of precast concrete integrated with the column base by embedding a plurality of reinforcing bars protruding from the upper surface through the first through hole from the column-to-beam joint below the column base. body and
with
the damper brace is joined at one end to the gusset plate;
Between the column base and the beam-to-column joint, between the first through hole and the reinforcing bar, and between the first through hole and the filler filled in the second through hole, the column base and the beam to column joint are separated. An integral, reinforcing structure of a building. A metal column winding plate fixed with a gusset plate to which one end of the damper brace can be joined;
A concrete part made of precast concrete placed inside the column winding plate;
a plurality of first through holes and second through holes penetrating from the upper surface to the lower surface of the concrete portion;
with
The plurality of first through holes are arranged along the column winding plate,
The column base, wherein the second through hole is arranged near the center of the upper surface and the lower surface. In claim 3,
The first through hole is formed by a sheath pipe embedded in the concrete portion,
The pedestal, wherein the sheath tube has no side openings.

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