JP7157670B2 - building frame - Google Patents

Description

The present invention relates to a building frame.

Conventionally, in high-rise buildings and super-high-rise buildings, there is known a core structure in which facilities such as elevators, stairs, machine rooms, and piping are collectively provided as a core portion of the frame of the building. The core structure utilizes the core portion as the main portion for structural bearing. The core structure can provide a large space around the core periphery since the core can bear most of the seismic energy.

Japanese Unexamined Patent Application Publication No. 2011-69148

By the way, when the wall that constitutes the core part is made to be a quake-resistant wall in order to prevent destruction damage due to an earthquake, the horizontal load applied to the quake-resistant wall during an earthquake causes the moment to concentrate on the legs of the quake-resistant wall, causing the legs of the quake-resistant wall to collapse. There is a problem that the part is greatly damaged.

The present disclosure has been made in view of the above, and an object thereof is to provide a building frame capable of suppressing damage to the core portion.

In order to solve the above-described problems and achieve the object, one aspect of the present disclosure provides a first pillar arranged at a corner of a core portion, a second pillar arranged at a side surface of the core portion, and a first pillar a wall pillar arranged between and the second pillar; a locking mechanism portion arranged between the first pillar and the second pillar and supporting the wall pillar; and connecting the wall pillar and the first pillar A building frame comprising a first energy absorbing member and a second energy absorbing member connecting a wall pillar and a second pillar.

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

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

In addition, it is preferable to provide a third energy absorbing member that connects the wall pillar and the floor slab in the above-described building frame.

In addition, in the aspect of the frame of the building described above, it is preferable to provide a joint member that connects the wall pillar and the floor slab.

In addition, in the aspect of the frame of the building described above, it is preferable that the wall pillars are provided by connecting with the floor slab provided outside the core portion.

In addition, in the aspect of the building frame described above, at least one of the first column, the second column and the wall column is preferably an unbonded precast prestressed concrete column.

Advantageous Effects of Invention According to the present disclosure, it is possible to suppress damage to the core portion.

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 structure of the building according to the first embodiment. FIG. 3 is a schematic diagram showing an example of the locking mechanism. FIG. 4 is a schematic diagram showing a first modified example of the locking mechanism. FIG. 5 is a schematic diagram showing a second modification of the locking mechanism. 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 joining members according to the third embodiment. FIG. 10 is a schematic plan view showing the rocking wall and floor slab according to the fourth embodiment.

EMBODIMENT OF THE INVENTION Below, embodiment of the frame of the building which concerns on this invention is described in detail based on drawing. It should be noted that the present invention is not limited to the description of the following embodiments. In addition, components in the following embodiments include components that can be easily replaced by those skilled in the art, or components that are substantially the same. Also, the components described below may be modified in various ways without departing from the scope of the invention. Furthermore, the components described below can be combined as appropriate. In addition, in the following description of the embodiments, the same configurations are denoted by the same reference numerals, and different configurations are denoted 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 structure of the building according to the first embodiment. The building frame 10 includes a core portion 20 and an outer peripheral portion 50 . The building frame 10 is, in an embodiment, a high-rise building frame. The building frame 10 is, for example, a frame of a high-rise building with a height of 60 m or more. As for the frame 10 of the building, a part of the core part 20 and the outer peripheral part 50 are illustrated in FIG. Specifically, the core part 20 is illustrated with floor beams (first beams 30) from the second to eighth floors and pillars 22 from the first to seventh floors. In the outer peripheral portion 50, the floor beams of the second and third floors (second beams 54 and third beams 56) and the pillars of the first and second floors (third pillars 52) are illustrated. One floor consists of floor beams (first beam 30, second beam 54 and third beam 56) and columns (first column 24, second column 26 and third column 52) provided on the floor beams. and including. The first floor means the floor immediately above the ground. The frame 10 of the building is illustrated in FIG. 1 with the floor beams of the first story omitted.

The core part 20 is provided in the central part of the building frame 10 in the embodiment. The core part 20 has a rectangular shape in plan view in the embodiment. More specifically, the core portion 20 has a square shape in plan view in the embodiment. The core portion 20 includes a plurality of posts 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 includes first pillars 24 and second pillars 26 . A first pillar 24, a second pillar 26, a locking wall 28 and a first beam 30 are provided for each floor. The core portion 20 may not be provided in the central portion as long as there is no problem in terms of structural design. The core part 20 does not have to reach the top floor of the building frame 10, and may be provided up to the top floor of the building frame 10 as long as there is no problem in structural design. The core portion 20 does not have to be square in plan view, and may have any shape, such as rectangular, trapezoidal, circular, or polygonal, as long as there is no problem in structural design.

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

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

A locking wall 28 is positioned between the first post 24 and the second post 26 . The first floor locking wall 28 includes a wall pillar 28M and a locking mechanism portion 28R provided at the lower end of the wall pillar 28M. The wall pillar 28M is supported by a locking mechanism 28R so as to be able to swing in a direction parallel to the wall surface direction. The wall surface direction is the direction in which the first pillars 24 and the second pillars 26 are arranged. The wall pillars 28M are arranged to face and be close to two adjacent surfaces of the first pillar 24, respectively. The wall pillar 28M has a rectangular shape in plan view, having a short side parallel to the opposing side of the first pillar 24 and a long side orthogonal to the short side. The short side of the wall pillar 28M is smaller than the opposing side of the first pillar 24 and the opposing second pillar 26 side. Assuming that the direction perpendicular to the wall surface direction and the vertical direction is the thickness direction of a set of the first pillar 24, the second pillar 26, and the wall pillar 28M, the following can be said. That is, the width in the thickness direction of the wall pillar 28M is smaller than the width in the thickness direction of the first pillar 24 and the width in the thickness direction of the second pillar 26 . In FIG. 7, the thickness direction of the first pillar 24, the second pillar 26, and the wall pillar 28M arranged in the horizontal direction of the paper is the vertical direction of the paper. The width in the thickness direction of the wall post 28M is not limited to this embodiment. The width in the thickness direction of the wall post 28M may be the same as the width in the thickness direction of the first post 24 and the width in the thickness direction of the second post 26 .

The first column 24 is, in embodiments, an unbonded precast prestressed concrete column. An unbonded precast prestressed concrete column includes precast concrete and PC steel members penetrating the precast concrete. Compared to cast-in-place concrete columns, unbonded precast prestressed concrete columns can shorten the construction period and have uniform and high quality. In addition, compared to reinforced concrete columns, unbonded precast prestressed concrete columns have less residual deformation after an earthquake because stress is applied in advance. Furthermore, since the PC steel material is not fixed in the unbonded precast prestressed concrete column, strain does not occur in a local concentration, and compared to the precast prestressed concrete column with the PC steel material bonded, it has a high degree of resilience. . Furthermore, the unbonded precast prestressed concrete column does not require the work of injecting and curing a filler for fixing the PC steel material to the precast concrete. Therefore, it is possible to immediately construct the pillars of the upper floors of the building, shortening the construction period.

The second column 26, like the first column 24, is, in an embodiment, an unbonded precast prestressed concrete column. The second post 26 can be of a different material or the same material as the first post 24 . The wall pillar 28M is, in the embodiment, of unbonded precast prestressed concrete, similar to the first pillar 24 and the second pillar 26 .

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

The first beam 30 connects two adjacent second pillars 26 on one side of the rectangular 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 shoring or the like to cure the 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.

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 post 24 and the wall post 28M of the locking wall 28. As shown in FIG. The first energy absorbing member 42 is provided for each floor. The first energy absorbing member 42 may be provided in the central portion 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 in one story, or two or more first energy absorbing members 42 may be provided in the height direction. The first energy absorbing member 42 connects the adjacent first pillar 24 and wall pillar 28M on one side of the rectangular shape of the core portion 20 in a plan view. 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 floor. The second energy absorbing member 44 may be provided in the central portion 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 in one story, or two or more may be provided in the height direction. The second energy absorbing member 44 connects the adjacent second pillar 26 and the wall pillar 28M on one side of the 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 capable of absorbing seismic energy. The energy absorbing member 40 is formed of a member or material such as, for example, low yield point steel, steel damper, oil damper, friction damper, or fiber reinforced concrete. The energy absorbing member 40 does not require a curing period for fixing the first post 24, the second post 26 and the locking wall 28 to the wall post 28M. The energy absorbing member 40 is coupled to the first pillar 24, the second pillar 26 and the wall pillar 28M using 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 rectangular shape of the outer peripheral portion 50 in plan view are parallel to the four sides of the rectangular shape of the core portion 20 in plan view. The outer peripheral portion 50 includes a plurality of third pillars 52 , a plurality of second beams 54 and a third beam 56 . A third pillar 52, a second beam 54 and a third beam 56 are provided for each floor. The outer peripheral portion 50 may also be provided above the core portion 20 . That is, the building frame 10 may have the core part 20 up to the middle floor and may not have the core part 20 in the upper floors. The first pillars 24 are continuously provided from the floor on which the core portion 20 is provided to the floor on which the core portion 20 is not provided. On floors where the core part 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, or the like is joined to the first column 24 on the uppermost floor of the core portion 20 .

A plurality of third pillars 52 are arranged along the outer circumference of the building frame 10 . That is, the plurality of third pillars 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 plan view. The third pillar 52 is a square pillar in plan view in the embodiment. The third pillars 52 are not arranged at the corners of the rectangular shape of the outer peripheral portion 50 in plan view. The third pillar 52 is, for example, a reinforced concrete pillar or a steel frame pillar. The arrangement of the third pillars 52 is not limited to the arrangement of the embodiment. The third pillars 52 may be arranged at corners of the rectangular shape of the outer peripheral portion 50 in plan view.

The second beam 54 connects two adjacent third pillars 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 in plan view, the second beams 54 are bent 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 the extension of the side surface of the core portion 20 . A third beam 56 connects the first column 24 and the third column 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 beam, a hybrid beam, or the like.

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

The upper support portion 28A is provided below the wall pillar 28M. The upper support portion 28A has a downward inverted triangular shape with a part of the lower end of the wall pillar 28M as a base. The lower support portion 28B is provided on the foundation slab B of the building frame 10. As shown in FIG. The lower support portion 28B is provided below the ground G. As shown in FIG. The lower support portion 28B has a triangular shape extending upward with a part of the upper end of the base slab B as a base. 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 recessed member 28D has a recessed groove at its lower end. The recess member 28D is provided at the lower end of the upper support portion 28A. The convex member 28E has a convex portion at its upper end that fits into the concave groove of the concave member 28D. The projecting member 28E is provided at the upper end of the lower support portion 28B. The concave member 28D is fitted with the convex member 28E. The concave member 28D and the convex member 28E are not tightly bound. Therefore, since the leg portion of the wall pillar 28M is pin jointed, the locking mechanism portion 28R allows the rotation of the wall pillar 28M during an earthquake. No moment is generated in the locking mechanism portion 28R. Specifically, no moment about the rotation axis parallel to the thickness direction of the wall pillar 28M is generated between the convex member 28E and the concave member 28D. The lower support part 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.

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

(First modification)
FIG. 4 is a schematic diagram showing a first modified example of the locking mechanism. A locking wall 281 of the first modified example differs from the locking wall 28 shown in FIG. 3 in that it includes a locking mechanism portion 281R instead of the locking mechanism portion 28R. The locking mechanism portion 281R supports the wall post 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 pillar 28M. The upper support portion 281A includes a convex curved surface at its lower end. The lower support portion 281B is provided on the foundation slab B of the building frame 10 . The lower support portion 281B is provided below the ground G. As shown in FIG. The lower support portion 281B includes a concave curved seat at its upper end. The convex curved surface of the upper support portion 281A slides against the concave curved seat of the lower support portion 281B. Therefore, the locking mechanism portion 281R does not generate a moment about the rotation axis parallel to the thickness direction of the wall pillar 28M. The lower support part 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.

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

(Second modification)
FIG. 5 is a schematic diagram showing a second modification of the locking mechanism. A locking wall 282 of the second modification differs 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 portion 282R supports the wall post 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 pillar 28M. The upper support portion 28A has a downward inverted triangular shape with a part of the lower end of the wall pillar 28M as a base. The lower support portion 28B is provided on the foundation slab B of the building frame 10. As shown in FIG. The lower support portion 28B is provided below the ground G. As shown in FIG. The lower support portion 28B has a triangular shape extending upward with a part of the upper end of the base slab B as a base. The pin member 282C supports the upper support portion 282A with respect to the lower support portion 282B. The pin member 282C includes a disk-shaped member 282D and a pin 282E.

The disk-shaped member 282D includes a central axis parallel to the thickness direction of the wall post 28M. The disk-shaped member 282D is provided at the lower end of the upper support portion 281A. The pin 282E includes an axis of rotation parallel to the thickness direction of the wall post 28M. The rotation axis of pin 282E coincides with the central axis of disk-shaped member 282D. The pin 282E is provided at the upper end of the lower support portion 282B. Disk-shaped member 282D and pin 282E are not tightened. The disk-shaped member 282D and the pin 282E are connected by pin joint. Therefore, the locking mechanism portion 282R does not generate a moment around the rotation axis parallel to the thickness direction of the wall pillar 28M. The lower support part 282B is provided below the ground G in the embodiment, but may be provided above the ground G. The upper support portion 282A, the lower support portion 282B, and the pin member 282C are made of steel.

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

The locking wall 28 is composed of a wall pillar 28M and a locking mechanism. The configuration of the locking mechanism is not limited to the locking mechanism portion 28R, the locking mechanism portion 281R, or the locking mechanism portion 282R described above. The structure of the locking mechanism may be any structure as long as it is a pin joint structure. The member or material of the locking mechanism need not be steel.

Next, the arrangement of the locking walls 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 locking wall 28 and energy absorbing member 40 . The building frame 10 is illustrated in FIG. 6 with the core portion 20, the outer peripheral portion 50 and part of the floor slab 60 shown. About the core part 20 and the outer peripheral part 50, part is illustrated similarly to FIG. The building frame 10 is illustrated with floor slabs 60 on the second and third floors. The frame 10 of the building is illustrated with wall materials 70 in FIG.

The floor slab 60 is provided outside the core portion 20 . The floor slab 60 and the first beam 30 may be cast integrally, for example. The floor slab 60 and the second beam 54 may be cast integrally, for example. The floor slab 60 and the third beam 56 may be cast integrally, for example. The floor slab 60 may be fixed directly to the first pillar 24 . The floor slab 60 may be directly secured to the second pillar 26 . The wall post 28M of the rocking wall 28 is spaced apart from the floor slab 60. As shown in FIG. Specifically, the building frame 10 includes a gap between the rocking 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 pillars 28M of the locking wall 28 are spaced from the wall material 70. As shown in FIG.

As described above, the building frame 10 of the first embodiment includes the first pillars 24 arranged at the corners of the core portion 20, the second pillars 26 arranged at the side surfaces of the core portion 20, and the first pillars 24 and the second pillar 26, a locking mechanism portion 28R that is arranged between the first pillar 24 and the second pillar 26 and supports the wall pillar 28M, and the wall pillar 28M. and the first pillar 24, and a second energy absorbing member 44 that connects the wall pillar 28M and the second pillar 26.

The structural effects of the building frame 10 are described below. When a horizontal load is applied to the building frame 10 during an earthquake, the deformation of the first pillar 24 and the second pillar 26 causes relative displacement of the first pillar 24 and the second pillar 26 with respect to the wall pillar 28M. Occur. Due to the relative displacement between the first pillar 24 and the wall pillar 28M, the first energy absorbing member 42 undergoes 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 pillar 26 and the wall pillar 28M. For this reason, 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 earlier than the other columns and beams, thereby transferring the vibration energy to heat. Converts into energy and absorbs seismic energy. Since the locking mechanism portion 28R of the wall pillar 28M is a pin joint, the wall pillar 28M is allowed to swing in a direction parallel to the direction in which the first pillar 24 and the second pillar 26 are arranged, and the leg portion has the thickness of the wall pillar 28M. There is no moment around the axis of rotation parallel to the direction. Therefore, damage to the leg portion of the wall pillar 28M can be prevented.

In the building frame 10 of the first embodiment, the locking mechanism portion 28R 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.

According to such a building frame 10, the wall pillar 28M does not generate a moment around the rotational axis parallel to the thickness direction of the wall pillar 28M in the legs. Therefore, damage to the leg portion of the wall pillar 28M can be prevented. The locking mechanism portion 28R is provided by pin joining, for example, to allow 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 precast concrete pillars. Load-bearing walls, which are often used for core structures, are large and heavy, making it difficult to lift with a crane. Therefore, it is often constructed with cast-in-place concrete, but in this embodiment, precast concrete columns may be used, so that lifting work with a crane is possible, improving workability and shortening the construction period.

In the building frame 10, at least one of the first column 24, the second column 26 and the rocking wall 28 is an unbonded precast prestressed concrete column. Compared to cast-in-place concrete columns, unbonded precast prestressed concrete columns can shorten the construction period and have uniform and high quality. In addition, compared to reinforced concrete columns, since stress is applied in advance, there is little residual deformation after an earthquake. Furthermore, since the PC steel material is not fixed in the unbonded precast prestressed concrete column, strain does not occur in a local concentration, and compared to the precast prestressed concrete column with the PC steel material bonded, it has a high degree of resilience. . Furthermore, the unbonded precast prestressed concrete column does not require the work of injecting and curing a filler for fixing the PC steel material to the precast concrete. Therefore, it is possible to immediately construct the pillars of the upper floors of the building, shortening the construction period.

(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 partial enlarged view in the first embodiment shown in FIG. In the building frame 10A of the second embodiment, the same components as those of the building frame 10 of the first embodiment are denoted by the same reference numerals, and descriptions thereof are omitted, and different configurations are described.

A core portion 20A of a building frame 10A shown in FIG. 8 differs from the core portion 20 of the first embodiment in that the energy absorbing member 40 further includes a third energy absorbing member 46. A third energy absorbing member 46 is provided between the wall post 28M of the rocking wall 28 and the end 60E of the floor slab 60A. The third energy absorbing member 46 connects the wall post 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 plan view.

As described above, the building frame 10A of the second embodiment includes the third energy absorbing member 46 that connects the rocking 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 joining members according to the third embodiment. FIG. 9 shows the same position as the A partial 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 denoted by the same reference numerals and descriptions thereof are omitted, and different configurations are described.

A core portion 20B of a building frame 10B shown in FIG. 9 differs from the core portion 20 of the first embodiment in that a joint member 48 is provided. A joining member 48 is provided between the locking wall 28 and the end 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 joint members 48 may be provided.

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

(Fourth embodiment)
Next, the building frame 10C of the fourth embodiment will be described. FIG. 10 is a schematic plan view showing the rocking wall and floor slab according to the fourth embodiment. FIG. 10 shows the same position as the A partial enlarged view in the first embodiment shown in FIG. In the building frame 10C of the second embodiment, the same reference numerals are given to the same configurations as those of the building frame 10 of the first embodiment, and descriptions thereof are omitted, and different configurations will be described.

A core portion 20C of a building frame 10C shown in FIG.

As described above, in the building frame 10C of the fourth embodiment, the wall pillars 28M are connected to the floor slab 60B provided outside the core portion 20C.

Although the embodiments of the present invention have been described above, the embodiments are not limited by the contents of these embodiments. 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 post 26 and the wall post 28M of the locking wall 28 are connected by a second energy absorbing member 44. As shown in FIG.

10, 10A, 10B, 10C Building frame 20, 20A, 20B, 20C Core part 22 Column 24 First column 26 Second column 28, 281, 282 Rocking wall 28M Wall column 28R, 281R, 282R Locking mechanism part 28A, 281A , 282A upper support portion 28B, 281B, 282B lower support portion 28C shear key 28D concave member 28E convex member 282C pin member 282D disk-shaped member 282E pin 30 first beam 40 energy absorbing member 42 first energy absorbing member 44 second energy absorbing Member 46 Third energy absorbing member 48 Joining member 50 Peripheral portion 52 Third column 54 Second beam 56 Third beam 60, 60A, 60B, 60C Floor slab 60E End 70 Wall material B Foundation slab G Ground

Claims (7)

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

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