JP2020117924A - Frame structure of building - Google Patents

Abstract

To provide a frame structure of a building capable of preventing damage on a core part.SOLUTION: A frame structure of a building is provided with: a first column placed at a corner of a core part; a second column placed on a side surface of the core part; a wall column placed between the first column and the second column; a locking mechanism part placed between the first column and the second column and supporting the wall column; a first energy absorption member connecting the wall column to the first column; and a second energy absorption member connecting the wall column to the second column.SELECTED DRAWING: Figure 1

Description

The present invention relates to a frame structure of a building.

BACKGROUND ART Conventionally, in high-rise buildings and super high-rise buildings, a core structure is known in which facilities such as elevators, stairs, machine rooms, and piping are centrally provided and used as a core portion of a building frame. The core structure utilizes the core part as a main part in terms of structural strength. The core structure can provide a large space in the outer peripheral portion of the core because the core portion can bear most of the seismic energy.

JP, 2011-69148, A

By the way, when the wall that constitutes the core part is an earthquake-resistant wall to prevent destruction and damage due to an earthquake, a horizontal load is applied to the earthquake-resistant wall during an earthquake, so that moments concentrate on the legs of the earthquake-resistant wall and There is a problem that the part is greatly damaged.

The present disclosure has been made in view of the above, and an object of the present disclosure is to provide a frame structure of a building in which damage to the core portion can be suppressed.

In order to solve the above-mentioned problems and achieve the object, one aspect of the present disclosure is a first pillar arranged at a corner of a core portion, a second pillar arranged on a side surface of the core portion, and a first pillar. And a second pillar, a wall pillar arranged between the first pillar and the second pillar, and a locking mechanism part supporting the wall pillar and connecting the wall pillar and the first pillar. It is a frame structure of a building provided with a 1st energy absorption member and a 2nd energy absorption member which connects a wall pillar and a 2nd pillar.

In addition, in the aspect of the above-mentioned structure of a building, it is preferable that the locking mechanism part allows the wall pillar to swing in a direction parallel to a direction in which the first pillar and the second pillar are arranged.

In addition, in the aspect of the above-mentioned structure of a building, it is preferable that the wall pillars are provided at intervals with respect to the floor slab provided outside the core portion.

In addition, in the aspect of the above-mentioned structure of a building, it is preferable to provide the 3rd energy absorption member which connects a wall pillar and a floor slab.

In addition, in the aspect of the above-mentioned structure of a building, it is preferred to provide a joining member which connects a wall pillar and a floor slab.

In addition, in the aspect of the above-mentioned frame of a building, it is preferred that the wall pillar is provided in combination with a floor slab provided outside the core portion.

In addition, in the above-mentioned aspect of the frame structure of the building, it is preferable that at least one of the first pillar, the second pillar, and the wall pillar is an unbonded precast prestressed concrete pillar.

According to the present disclosure, there is an effect that damage to the core portion can be suppressed.

FIG. 1 is a schematic perspective view showing a frame structure of a building according to the first embodiment. FIG. 2 is a schematic plan view showing the frame of the building according to the first embodiment. FIG. 3 is a schematic view showing an example of the locking mechanism section. FIG. 4 is a schematic view showing a first modification of the locking mechanism section. FIG. 5: is a schematic diagram which shows the 2nd modification of a locking mechanism part. FIG. 6 is a schematic perspective view showing the frame structure of the building according to the first embodiment. FIG. 7 is an enlarged view of part A in FIG. FIG. 8 is a schematic plan view showing a locking wall and an energy absorbing member according to the second embodiment. FIG. 9 is a schematic plan view showing a locking wall and a joining member according to the third embodiment. FIG. 10 is a schematic plan view showing a locking wall and a floor slab according to the fourth embodiment.

Embodiments of a frame structure of a building according to the present invention will be described below in detail with reference to the drawings. The present invention is not limited to the description of the embodiments below. In addition, constituent elements in the following embodiments include elements that can be easily replaced by those skilled in the art, or substantially the same elements. Further, the constituent elements described below may be variously modified without departing from the spirit of the invention. Furthermore, the components described below can be combined as appropriate. In the following description of the embodiments, the same components are designated by the same reference numerals, and different components are designated by different reference numerals.

(First embodiment)
First, the overall configuration of the building frame 10 of the first embodiment will be described. FIG. 1 is a schematic perspective view showing a frame structure of a building according to the first embodiment. FIG. 2 is a schematic plan view showing the frame of the building according to the first embodiment. The frame 10 of the building includes a core portion 20 and an outer peripheral portion 50. The building frame 10 is, in the embodiment, a high-rise building frame. The building frame 10 is, for example, a super high-rise building frame having a height of 60 m or more. In the frame 10 of the building, a core portion 20 and a part of the outer peripheral portion 50 are shown in FIG. 1. Specifically, in the core portion 20, floor beams (first beams 30) from the second layer to the eighth layer and columns 22 from the first layer to the seventh layer are illustrated. In the outer peripheral portion 50, floor beams of the second and third layers (second beam 54 and third beam 56) and columns of the first and second layers (third column 52) are illustrated. One floor is a floor beam (first beam 30, second beam 54, and third beam 56) and a column (first column 24, second column 26, and third column 52) provided on the floor beam. And, including. The first layer means a layer directly above the ground. The building frame 10 is illustrated in FIG. 1 with the floor beams of the first floor omitted.

In the embodiment, the core portion 20 is provided in the central portion of the frame structure 10 of the building. In the embodiment, the core portion 20 has a rectangular shape in plan view. More specifically, in the embodiment, the core portion 20 has a square shape in plan view. The core unit 20 includes a plurality of columns 22, a plurality of locking walls 28, a plurality of first beams 30, and a plurality of energy absorbing members 40. The plurality of pillars 22 include a first pillar 24 and a second pillar 26. The first pillar 24, the second pillar 26, the locking wall 28, and the first beam 30 are provided for each layer. The core portion 20 may not be provided in the central portion as long as there is no problem in structural design. The core part 20 does not have to be provided to the uppermost floor of the frame 10 of the building as long as there is no problem in structural design, and may be provided to the uppermost floor of the frame 10 of the building. The core portion 20 does not have to have a square shape in plan view, and may have any shape such as a rectangular shape, a trapezoidal shape, a circular shape, or a polygonal shape as long as there is no problem in structural design.

The first pillar 24 is arranged at a corner of the core portion 20 in a plan view. In the embodiment, the first columns 24 are arranged at the corners of the rectangular shape that is the shape of the core portion 20 in plan view. The plan view shape of the core portion 20 means a shape drawn by the outer peripheral surface of the core portion 20 in a plan view. In the embodiment, the first pillar 24 is a pillar having a surface parallel to the side surface of the core portion 20. The first pillar 24 has a rectangular shape in a plan view. More specifically, the first pillar 24 is a square pillar in a plan view in the embodiment. The first pillar 24 does not have to be a square shape in a plan view, and may have any shape such as a rectangular shape, a trapezoidal shape, a circular shape, or a polygonal shape as long as there is no problem in structural design.

The second pillar 26 is arranged on the side surface of the core portion 20 in a plan view. In the embodiment, the second pillars 26 are arranged on the sides of the core portion 20 that are rectangular in plan view. The 2nd pillar 26 is a pillar which has a field parallel to the side of core part 20 in an embodiment. The second pillar 26 has a rectangular shape in plan view. More specifically, the second pillar 26 is a square pillar in plan view in the embodiment. In the embodiment, two second columns 26 are arranged for each one first column 24. In the embodiment, two second pillars 26 are arranged for each first pillar 24, but three or more second pillars 26 may be arranged, or a different number may be arranged for each layer. At least a plurality of the second pillars 26 may be provided in the frame 10 of the building. The second pillar 26 does not have to have a square shape in a plan view, and may have any shape such as a rectangular shape, a trapezoidal shape, a circular shape, or a polygonal shape as long as there is no problem in structural design.

The locking wall 28 is arranged between the first pillar 24 and the second pillar 26. The locking wall 28 of the first layer includes a wall pillar 28M and a locking mechanism portion 28R provided at the lower end of the wall pillar 28M. The wall post 28M is swingably supported by the locking mechanism section 28R in a direction parallel to the wall surface direction. The wall surface direction is a direction in which the first columns 24 and the second columns 26 are arranged. The wall columns 28M are arranged so as to face and be adjacent to two adjacent surfaces of the first column 24, respectively. The wall column 28M has a rectangular shape having short sides parallel to the opposing sides of the first column 24 and long sides orthogonal to the short sides in a plan view. The short sides of the wall columns 28M are smaller than the sides of the opposing first columns 24 and the opposing sides of the second columns 26. With respect to the set of the first pillar 24, the second pillar 26, and the wall pillar 28M, it can be said that the direction orthogonal to the wall surface direction and the vertical direction is the thickness direction. That is, the width of the wall pillar 28M in the thickness direction is smaller than the width of the first pillar 24 in the thickness direction and the width of the second pillar 26 in the thickness direction. Note that, in FIG. 7, the thickness direction of the first pillar 24, the second pillar 26, and the wall pillar 28M arranged in the left-right direction of the paper surface is the vertical direction of the paper surface. The width of the wall column 28M in the thickness direction is not limited to this embodiment. The width of the wall pillar 28M in the thickness direction may be the same as the width of the first pillar 24 in the thickness direction and the width of the second pillar 26 in the thickness direction.

The 1st pillar 24 is an unbonded precast prestressed concrete pillar in an embodiment. The unbonded precast prestressed concrete column includes precast concrete and PC steel that penetrates the precast concrete. Unbonded precast prestressed concrete columns have a shorter construction period than the cast-in-place concrete columns, and the quality is uniform and of high quality. In addition, unbonded precast prestressed concrete columns are less prestressed than reinforced concrete columns because they are prestressed, and therefore have less residual deformation after an earthquake. Further, in the unbonded precast prestressed concrete column, since the PC steel material is not fixed, the strain is not locally concentrated and has higher resilience as compared with the precast prestressed concrete column to which the PC steel material is bonded. .. Further, the unbonded precast prestressed concrete columns do not have the work of injecting and curing the filler for fixing the PC steel material to the precast concrete. Therefore, the pillars on the upper floors of the building can be immediately constructed, and the construction period can be shortened.

The 2nd pillar 26 is an unbonded precast prestressed concrete pillar like the 1st pillar 24 in an embodiment. The second pillar 26 may be made of a different material or the same material as the first pillar 24. The wall pillar 28M is made of unbonded precast prestressed concrete, like the first pillar 24 and the second pillar 26 in the embodiment.

The first pillar 24 and the second pillar 26 may be reinforced concrete pillars, precast concrete pillars, precast prestressed concrete pillars, or the like. The wall pillar 28M may be made of reinforced concrete, precast concrete, steel, or precast prestressed concrete.

The first beam 30 connects two adjacent second columns 26 on one side of the rectangular rectangular shape that is the shape of the core portion 20 in plan view. The first beam 30 is supported by the second pillar 26. The first beam 30 is a reinforced concrete beam in the embodiment. Reinforced concrete beams are supported by supporting works to cure concrete. The first beam 30 may be a steel beam, a precast concrete beam, an unbonded precast prestressed concrete beam, a precast prestressed concrete beam, or the like.

The energy absorbing member 40 includes a first energy absorbing member 42 and a second energy absorbing member 44. The first energy absorbing member 42 is provided between the first pillar 24 and the wall pillar 28M of the locking wall 28. The first energy absorbing member 42 is provided for each layer. The first energy absorbing member 42 may be provided at the center of the first column 24 in the height direction. That is, as shown in FIG. 1, the first energy absorbing member 42 may be provided at a height different from that of the first beam 30. The first energy absorbing member 42 may be provided at the same height as the first beam 30. Only one first energy absorbing member 42 may be provided for each layer in the height direction, or two or more first energy absorbing members 42 may be provided for each layer. The 1st energy absorption member 42 connects the 1st pillar 24 and wall pillar 28M which adjoin adjacent one side in the shape of a plane view of core part 20 of a rectangle. The second energy absorbing member 44 is provided between the second pillar 26 and the wall pillar 28M. The second energy absorbing member 44 is provided for each layer. The second energy absorbing member 44 may be provided at the center of the second column 26 in the height direction. That is, as shown in FIG. 1, the second energy absorbing member 44 may be provided at a height different from that of the first beam 30. The second energy absorbing member 44 may be provided at the same height as the first beam 30. Only one second energy absorbing member 44 may be provided for each layer in the height direction, or two or more second energy absorbing members 44 may be provided for each layer. The second energy absorbing member 44 connects the adjacent second pillar 26 and the wall pillar 28M on one side of the rectangular rectangular shape that is the plan view shape of the core portion 20.

The energy absorbing member 40 can absorb seismic energy. The energy absorbing member 40 has energy absorbing properties. The energy absorbing member 40 may be made of any member or material as long as it can absorb seismic energy. The energy absorbing member 40 is formed of a member or material such as a low yield point steel material, a steel material damper, an oil damper, a friction damper, or fiber reinforced concrete. The energy absorbing member 40 does not require a curing period for fixing the first pillar 24, the second pillar 26, and the locking wall 28 to the wall pillar 28M. The energy absorbing member 40 is coupled to the first pillar 24, the second pillar 26, and the wall pillar 28M with bolts or the like. Thereby, the energy absorbing member 40 can be easily replaced.

The outer peripheral portion 50 is a frame frame provided on the outer periphery of the core portion 20. The four sides of the outer peripheral portion 50, which are rectangular in plan view, are parallel to the four sides of the core portion 20, which are rectangular in plan view. The outer peripheral portion 50 includes a plurality of third columns 52, a plurality of second beams 54, and a third beam 56. The third pillar 52, the second beam 54, and the third beam 56 are provided for each layer. The outer peripheral portion 50 may also be provided above the core portion 20. That is, the frame 10 of the building may have the core portion 20 up to the middle level and may not have the core part 20 at the upper level. The first pillar 24 is continuously provided from a layer where the core part 20 is provided to a layer where the core part 20 is not provided. In a layer in which the core portion 20 is not provided, a reinforced concrete column or the like may be provided instead of the first column 24 which is an unbonded precast prestressed concrete column. In this case, a reinforced concrete column, a steel frame column, etc. are joined to the 1st column 24 of the highest hierarchy of core part 20.

The plurality of third pillars 52 are arranged along the outer periphery of the frame 10 of the building. That is, the plurality of third columns 52 are arranged along the side surface of the outer peripheral portion 50. The third pillar 52 is a pillar having a surface parallel to the side surface of the outer peripheral portion 50. The third pillar 52 has a rectangular shape in a plan view. In the embodiment, the third pillar 52 is a square pillar in plan view. The third pillars 52 are not arranged at the corners of the rectangular shape that is the shape of the outer peripheral portion 50 in plan view. The third column 52 is, for example, a reinforced concrete column or a steel frame column. The arrangement of the third pillars 52 is not limited to the arrangement of the embodiment. The third pillars 52 may be arranged at the corners of the rectangular shape that is the shape of the outer peripheral portion 50 in plan view.

The second beam 54 connects two adjacent third columns 52 on the side surface of the outer peripheral portion 50. Since the third pillars 52 are not arranged at the rectangular corners of the outer peripheral portion 50 which are the plan view shape, the second beams 54 are bent and provided in an L shape in plan view. The second beam 54 is, for example, a reinforced concrete beam, a steel frame beam, a hybrid beam, or the like.

The third beam 56 is arranged on an extension of the side surface of the core portion 20. The third beam 56 connects the first pillar 24 and the third pillar 52. The third beam 56 is, for example, a reinforced concrete beam. The third beam 56 may be the same member as the second beam 54 or may be a different member. The third beam 56 is, for example, a reinforced concrete beam, a steel frame beam, a hybrid beam, or the like.

Next, the locking mechanism portion 28R of the embodiment will be described. FIG. 3 is a schematic view showing an example of the locking mechanism section. In the embodiment shown in FIG. 3, the locking mechanism portion 28R supports the wall column 28M. The locking mechanism portion 28R includes an upper support portion 28A, a lower support portion 28B, and a shear key 28C.

The upper support portion 28A is provided below the wall column 28M. The upper support portion 28A has an inverted triangular shape in a downward direction with a part of the lower end of the wall column 28M as a base. The lower support portion 28B is provided on the foundation slab B of the frame 10 of the building. The lower support portion 28B is provided below the ground G. The lower support portion 28B has a triangular shape facing upward with a part of the upper end of the base slab B as the bottom side. The shear key 28C is provided between the upper support portion 28A and the lower support portion 28B. The shear key 28C supports the upper support portion 28A with respect to the lower support portion 28B. The shear key 28C includes a concave member 28D and a convex member 28E. The recess member 28D has a recess groove at the lower end. The recessed material 28D is provided at the lower end of the upper support portion 28A. The convex member 28E has a convex portion at the upper end that fits into the concave groove of the concave member 28D. The convex member 28E is provided on the upper end of the lower support portion 28B. The concave member 28D fits with the convex member 28E. The concave member 28D and the convex member 28E are not tightly connected. For this reason, since the legs of the wall columns 28M are pin-jointed, the locking mechanism unit 28R allows the wall columns 28M to rotate during an earthquake. No moment is generated in the locking mechanism portion 28R. Specifically, a moment about the rotation axis parallel to the thickness direction of the wall column 28M is not generated between the convex member 28E and the concave member 28D. The lower support portion 28B is provided below the ground G in the embodiment, but may be provided above the ground G. The upper support portion 28A, the lower support portion 28B, and the shear key 28C are made of steel material.

The wall pillar 28M and the upper support portion 28A are supported rotatably around a rotation axis parallel to the thickness direction of the wall pillar 28M with the shear key 28C as a fulcrum. Since no moment about the rotation axis is generated in the locking mechanism unit 28R, the locking mechanism unit 28R allows the wall column 28M to swing in a direction parallel to the wall direction during an earthquake.

(First modification)
FIG. 4 is a schematic view showing a first modification of the locking mechanism section. The locking wall 281 of the first modified example is different from the locking wall 28 shown in FIG. 3 in that a locking mechanism portion 281R is included instead of the locking mechanism portion 28R. The locking mechanism unit 281R supports the wall column 28M. The locking mechanism portion 281R includes an upper support portion 281A and a lower support portion 281B.

The upper support portion 281A is provided below the wall column 28M. The upper support portion 281A includes a convex curved surface at the lower end. The lower support portion 281B is provided on the foundation slab B of the frame 10 of the building. The lower support portion 281B is provided below the ground G. The lower support portion 281B includes a concave curved surface seat at the upper end. The convex curved surface of the upper support portion 281A slides on the concave curved surface seat of the lower support portion 281B. Therefore, no moment about the rotation axis parallel to the thickness direction of the wall column 28M is generated in the locking mechanism portion 281R. The lower support portion 281B is provided below the ground G in the embodiment, but may be provided above the ground G. The upper support portion 281A and the lower support portion 281B are made of steel material.

The wall pillar 28M and the upper support portion 281A are rotatably supported by the lower support portion 281B around a rotation axis parallel to the thickness direction of the wall pillar 28M. No moment about the rotation axis is generated in the locking mechanism portion 281R. The locking mechanism unit 281R allows the wall column 28M to swing in a direction parallel to the wall direction during an earthquake.

(Second modified example)
FIG. 5: is a schematic diagram which shows the 2nd modification of a locking mechanism part. The locking wall 282 of the second modified example is different from the locking wall 28 shown in FIG. 3 in that it includes a locking mechanism portion 282R instead of the locking mechanism portion 28R. The locking mechanism 282R supports the wall column 28M. The locking mechanism portion 282R includes an upper support portion 282A, a lower support portion 282B, and a pin member 282C.

The upper support portion 281A is provided below the wall column 28M. The upper support portion 28A has an inverted triangular shape in a downward direction with a part of the lower end of the wall column 28M as a base. The lower support portion 28B is provided on the foundation slab B of the frame 10 of the building. The lower support portion 28B is provided below the ground G. The lower support portion 28B has a triangular shape facing upward with a part of the upper end of the base slab B as the bottom side. The pin member 282C supports the upper support portion 282A with respect to the lower support portion 282B. The pin member 282C includes a disc-shaped member 282D and a pin 282E.

The disk-shaped member 282D includes a central axis parallel to the thickness direction of the wall column 28M. The disk-shaped member 282D is provided at the lower end of the upper support portion 281A. The pin 282E includes a rotation axis parallel to the thickness direction of the wall column 28M. The rotation axis of the pin 282E coincides with the central axis of the disk-shaped member 282D. The pin 282E is provided on the upper end of the lower support portion 282B. The disk-shaped member 282D and the pin 282E are not tightly connected. The disk-shaped member 282D and the pin 282E are connected by pin joining. Therefore, no moment about the rotation axis parallel to the thickness direction of the wall column 28M is generated in the locking mechanism portion 282R. The lower support portion 282B is provided below the ground G in the embodiment, but may be provided above the ground G. The upper support 282A, the lower support 282B, and the pin member 282C are made of steel.

The wall pillar 28M and the upper support portion 282A are rotatably supported with respect to the lower support portion 282B about a rotation axis parallel to the thickness direction of the wall pillar 28M. Since no moment about the rotation axis is generated in the locking mechanism unit 282R, the locking mechanism unit 282R allows the wall column 28M to swing in a direction parallel to the wall direction during an earthquake.

The locking wall 28 includes a wall column 28M and a locking mechanism. The configuration of the locking mechanism is not limited to the locking mechanism unit 28R, the locking mechanism unit 281R, or the locking mechanism unit 282R described above. The locking mechanism may have a pin-bonding structure. The member or material of the locking mechanism need not be steel.

Next, the arrangement of the locking wall 28 in the thickness direction will be described. FIG. 6 is a schematic perspective view showing the frame structure of the building according to the first embodiment. FIG. 7 is an enlarged view of part A in FIG. FIG. 7 shows the locking wall 28 and the energy absorbing member 40. In the frame 10 of the building, a core portion 20, an outer peripheral portion 50, and a part of the floor slab 60 are illustrated in FIG. 6. As for the core portion 20 and the outer peripheral portion 50, a part is shown as in FIG. 1. In the frame 10 of the building, floor slabs 60 of the second and third floors are shown. In the frame 10 of the building, a wall member 70 is shown in FIG. 7.

The floor slab 60 is provided outside the core portion 20. The floor slab 60 and the first beam 30 may be integrally cast, for example. The floor slab 60 and the second beam 54 may be integrally cast, for example. The floor slab 60 and the third beam 56 may be integrally cast, for example. The floor slab 60 may be directly fixed to the first pillar 24. The floor slab 60 may be directly fixed to the second pillar 26. The wall pillar 28M of the locking wall 28 is provided at a distance from the floor slab 60. Specifically, the frame 10 of the building includes a gap between the locking wall 28 and the end portion 60E of the floor slab 60 on the core portion 20 side.

The wall material 70 is provided inside the first pillar 24, the second pillar 26, and the first beam 30 in the core portion 20. The wall material 70 forms an inner space of the core portion 20. The wall post 28M of the locking wall 28 is provided at a distance from the wall member 70.

As described above, the building frame 10 of the first embodiment has the first pillars 24 arranged at the corners of the core portion 20, the second pillars 26 arranged on the side surfaces of the core portion 20, and the first pillars. Wall pillar 28M disposed between the first pillar 24 and the second pillar 26, and a locking mechanism portion 28R disposed between the first pillar 24 and the second pillar 26 and supporting the wall pillar 28M, and the wall pillar 28M. And a first energy absorbing member 42 that connects the first pillar 24 to each other, and a second energy absorbing member 44 that connects the wall pillar 28M and the second pillar 26.

The structural effect of the building frame 10 will be described below. When a horizontal load is applied to the frame 10 of the building during an earthquake, the first pillar 24 and the second pillar 26 are deformed, so that the first pillar 24 and the second pillar 26 are displaced relative to the wall pillar 28M. appear. The relative displacement between the first column 24 and the wall column 28M causes the first energy absorbing member 42 to undergo shear deformation in the plastic region. The second energy absorbing member 44 undergoes shear deformation in the plastic region due to the relative displacement between the second column 26 and the wall column 28M. Therefore, for example, when the energy absorbing member 40 is a low yield point steel material, the first energy absorbing member 42 and the second energy absorbing member 44 yield the vibration energy by yielding before other columns and beams. Converts to energy and absorbs seismic energy. Since the rocking mechanism portion 28R is a pin joint, the wall post 28M allows swinging in a direction parallel to the direction in which the first post 24 and the second post 26 are arranged, and the thickness of the wall post 28M at the leg portion. The moment about the rotation axis parallel to the direction does not occur. Therefore, damage to the legs of the wall columns 28M can be prevented.

In the frame 10 of the building according to the first embodiment, the locking mechanism unit 28R allows the wall column 28M to swing in a direction parallel to the direction in which the first column 24 and the second column 26 are arranged.

According to the frame 10 of such a building, the wall pillar 28M does not generate a moment about the rotation axis parallel to the thickness direction of the wall pillar 28M in the leg portion. Therefore, damage to the legs of the wall columns 28M can be prevented. The rocking mechanism portion 28R is provided by, for example, pin joining, and allows the wall pillar 28M to swing in a direction parallel to the direction in which the first pillar 24 and the second pillar 26 are arranged.

Further, at least one of the first pillar 24, the second pillar 26, and the locking wall 28 may be a precast concrete pillar. Since the bearing wall, which is often used for the core structure, is large and heavy, it is difficult to carry out a heavy load with a crane. For this reason, it is often constructed using cast-in-place concrete, but in the present embodiment, it is also possible to use precast concrete pillars, so that it is possible to carry out toothpicking work with a crane, improving workability and shortening the construction period.

In the frame 10 of the building, at least one of the first pillar 24, the second pillar 26, and the locking wall 28 is an unbonded precast prestressed concrete pillar. Unbonded precast prestressed concrete columns have a shorter construction period than the cast-in-place concrete columns, and the quality is uniform and of high quality. In addition, compared to reinforced concrete columns, the stress is applied in advance, so there is less residual deformation after an earthquake. Further, in the unbonded precast prestressed concrete column, since the PC steel material is not fixed, the strain is not locally concentrated and has higher resilience as compared with the precast prestressed concrete column to which the PC steel material is bonded. .. Further, the unbonded precast prestressed concrete columns do not have the work of injecting and curing the filler for fixing the PC steel material to the precast concrete. Therefore, the pillars on the upper floors of the building can be immediately constructed, and the construction period can be shortened.

(Second embodiment)
Next, the building frame 10A of the second embodiment will be described. FIG. 8 is a schematic plan view showing a locking wall and an energy absorbing member according to the second embodiment. FIG. 8 shows the same position as the A part enlarged view in the first embodiment shown in FIG. In the frame 10A of the building according to the second embodiment, the same components as those of the frame 10 of the building according to the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. A different configuration will be described.

The core portion 20A of the building frame 10A shown in FIG. 8 is different from the core portion 20 of the first embodiment in that the energy absorbing member 40 further includes a third energy absorbing member 46. The third energy absorbing member 46 is provided between the wall column 28M of the locking wall 28 and the end portion 60E of the floor slab 60A. The third energy absorbing member 46 connects the wall pillar 28M and the floor slab 60A. Specifically, the third energy absorbing member 46 connects the wall pillar 28M and the floor slab 60A in the thickness direction in a plan view.

As described above, the building frame 10A of the second embodiment includes the third energy absorbing member 46 that connects the locking wall 28 and the floor slab 60A.

(Third Embodiment)
Next, the building frame 10B of the fourth embodiment will be described. FIG. 9 is a schematic plan view showing a locking wall and a joining member according to the third embodiment. FIG. 9 shows the same position as the A part enlarged view in the first embodiment shown in FIG. In the building frame 10B of the third embodiment, the same components as those of the building frame 10 of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted, and different components will be described.

The core portion 20B of the frame 10B of the building shown in FIG. 9 is different from the core portion 20 of the first embodiment in that the joining member 48 is provided. The joining member 48 is provided between the locking wall 28 and the end portion 60E of the floor slab 60B. The joining member 48 is a steel frame (H steel, horizontal truss, etc.) or the like. A plurality of joining members 48 may be provided.

As described above, the building frame 10B of the third embodiment includes the joining member 48 that joins the wall pillar 28M and the floor slab 60B.

(Fourth Embodiment)
Next, a building frame 10C according to the fourth embodiment will be described. FIG. 10 is a schematic plan view showing a locking wall and a floor slab according to the fourth embodiment. FIG. 10 shows the same position as the A part enlarged view in the first embodiment shown in FIG. In the building frame 10C of the second embodiment, the same components as those of the building frame 10 of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

The core portion 20C of the frame 10C of the building shown in FIG. 10 is different from the core portion 20 of the first embodiment in that the end portion 60E of the floor slab 60C is joined to the locking wall 28.

As described above, in the frame 10C of the building according to the fourth embodiment, the wall columns 28M are provided by being combined with the floor slab 60B provided outside the core portion 20C.

Although the embodiment of the present invention has been described above, the embodiment is not limited by the contents of this embodiment. For example, when four or more second pillars 26 are arranged for one first pillar 24, the locking wall 28 may be arranged between two adjacent second pillars 26. Each second pillar 26 and the wall pillar 28M of the locking wall 28 are connected by the second energy absorbing member 44.

10, 10A, 10B, 10C Building frame 20, 20A, 20B, 20C Core part 22 Pillar 24 1st pillar 26 2nd pillar 28, 281, 282 Locking wall 28M Wall pillar 28R, 281R, 282R Locking mechanism part 28A, 281A , 282A Upper support part 28B, 281B, 282B Lower support part 28C Shear key 28D Recessed material 28E Convex member 282C Pin member 282D Disk member 282E Pin 30 First beam 40 Energy absorption member 42 First energy absorption member 44 Second energy absorption Member 46 Third energy absorbing member 48 Joining member 50 Outer peripheral portion 52 Third pillar 54 Second beam 56 Third beam 60, 60A, 60B, 60C Floor slab 60E End portion 70 Wall material B Foundation slab G Ground

Claims (7)

A first pillar arranged at a corner of the core portion;
A second pillar arranged on a side surface of the core portion;
A wall pillar arranged between the first pillar and the second pillar;
A locking mechanism portion arranged between the first pillar and the second pillar and supporting the wall pillar;
A first energy absorbing member connecting the wall pillar and the first pillar;
A second energy absorbing member that connects the wall pillar and the second pillar;
The structure of the building that includes the. The frame structure for a building according to claim 1, wherein the locking mechanism section allows the wall pillar to swing in a direction parallel to a direction in which the first pillar and the second pillar are arranged. The frame structure of a building according to claim 1 or 2, wherein the wall pillars are provided at intervals with respect to a floor slab provided outside the core portion. The building frame according to claim 3, further comprising a third energy absorbing member that connects the wall pillar and the floor slab. The frame structure for a building according to claim 3, further comprising: a joining member that connects the wall pillar and the floor slab. The frame structure for a building according to claim 1, wherein the wall pillar is provided in combination with a floor slab provided outside the core portion. At least one of the said 1st pillar, the said 2nd pillar, and the said wall pillar is an unbonded precast prestressed concrete pillar, The frame of the building in any one of Claim 1 to 6.

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