JP2002206353A - Vibration control structure building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control structure building capable of forming wide and expansive indoor spaces with large-span floor slabs and having excellent degree of freedom and future updating property for comfortability and planning and excellent aseismatic performance. SOLUTION: PC (prestressing) steels are arranged to introduce prestress in the longitudinal direction in the cross sections of beam members 30 connecting the inner peripheral frame 10 and outer peripheral frame 20 of the building, and fixing sections at both ends of the PC steels arranged in the beam members are provided in the cross sections of beam members near span end sections. Vibration control devices 13 are arranged on the inner peripheral frame 10 of the building. An apex beam means 50 is provided on the inner peripheral frame 10 and the beam members 30 at the uppermost section of the building.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration control structure provided with an inner frame located at the center of a building and an outer frame located at the outer periphery of the building.

[0002]

2. Description of the Related Art A tower-like building in which a core (common parts such as elevators and stairs) or a void is arranged in the center of a building and a dwelling unit zone is arranged along the periphery of the building is suitable for constructing a high-rise apartment building. I have. By arranging dwelling units along the periphery of the building, a living space with excellent lighting, ventilation, and views can be obtained. FIG. 6A is a plan view of a reference floor of a conventional building having a pure ramen structure. The columns 90 and the beams 91 are arranged in a grid with a span of about 6 m, and there are many columns and beams. Therefore, it is not possible to form a wide and open living space. Planning and equipment piping routes are restricted, and renewability (reform, replacement of pipes, etc.) of dwelling units and equipment is not high. Also, during an earthquake, deformation and damage tend to concentrate on a certain layer.

FIG. 6 (b) is a plan view of a reference floor of a building having a double tube frame in which the pure ramen structure is improved. Although the number of pillars in the dwelling unit zone can be reduced as compared with the pure ramen structure, the number of pillars in the dwelling unit zone is still 9
There are many zeros and beams 91 and 91a. Outside the inner peripheral frame 92 of the building, one block 93 of a floor slab whose periphery is partitioned by columns 90 and beams 91 and 91a forms a rectangle,
The short side is continuously provided with a small span of about 6 m. In addition, since the columns 94 are arranged in a small span on the outer periphery of the building, there is a problem that the openness is impaired.

Therefore, it is conceivable to form the floor slab having a large span by eliminating the beams 91 and 91a. However, in such a case, the vertical load on one floor slab is constantly increased, so that it is necessary to increase the beam size in order to support the vertical load. When the beam size is increased, the beam shape protrudes greatly into the room, and a wide and open room space cannot be formed. In addition, planning and equipment piping routes are also restricted.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned disadvantages of the prior art. A large and open indoor space can be formed by a large span floor slab. It is an object of the present invention to provide a vibration control structure building excellent in the degree of freedom and renewability in the future, and to provide a vibration control structure building excellent in seismic performance.

[0006]

[Means for Solving the Problems] (1) In a building having an inner frame located at the center of the building and an outer frame located at the outer periphery of the building, a beam member connecting the inner frame and the outer frame. In the cross section of the PC steel material in the length direction, pre-stress is introduced, and the fixing parts at both ends of the PC steel material wired in the beam member are provided in the cross section of the beam member near the span end,
This is a vibration control structure building in which a vibration control device is disposed on an inner peripheral frame of a building, and a top beam means is provided at an uppermost part of the building above the inner peripheral frame and a beam member.

[0007] The present invention can further include the following configuration. (2) The floor slab formed between the inner peripheral frame and the outer peripheral frame is partitioned by the beam members, and each partitioned block forms a substantially square large span floor slab. (3) A column-free space is formed between the inner and outer frames of the reference floor. (4) The beam member is a steel frame concrete structure or a steel frame reinforced concrete structure. (5) The PC steel material is wired in a bow shape swelling downward at the center of the span in the length direction of the beam member, and generates a lifting force on the floor slab.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to examples. FIG. 1 is a side view showing a framework of a vibration control structure building 1 according to an embodiment of the present invention, which is constructed as an apartment house. FIG. 2 is a plan view of a reference floor of the building 1.

As shown in FIG. 1, a building 1 is composed of a high-rise building main body 2 having a multi-story, tower-like structure and a base structure 3 for supporting the same. The tower-like ratio of the building body 2 (= maximum height of the structure / effective fall span length) is large, and its front shape is a vertically long and substantially rectangular shape. The building 1 has an inner frame 10 located at the center of the building and an outer frame 2 located at the outer periphery of the building.
0, a beam member 3 connecting the inner frame 10 and the outer frame 20
0, and top beam means 50.

As shown in FIG. 2, the building 1 is formed in a substantially square shape in plan view. The building 1 has a cylindrical shape in which cores (common parts such as elevators and stairs) are arranged in an inner peripheral frame 10. In the present embodiment, the core 14 is disposed in the inner peripheral frame 10, but may be a void (a blow-through space). A floor slab 40 is provided between the inner frame 10 and the outer frame 20.
Is formed. When the core is arranged in the inner peripheral frame 10,
Usually, dwelling units are sequentially arranged around the inner peripheral frame 10 and along the outer peripheral frame 20 around the common corridor. Since the corner 1a of the building is chamfered in a tapered shape, the field of view is open in three directions, and a good view and daylighting are realized.

The inner peripheral frame 10 is composed of a rigid frame or a multi-story shear wall structure or a combination thereof. In the present embodiment, the frame is constituted by the columns 11, 11a and the beams 12 to form a rigid frame. The vibration control device 13 is disposed on the inner peripheral frame 10. In the present embodiment, as shown in FIG. 1, K-shaped vibration damping braces 13 arranged in an inverted V-shape are provided intensively. Reverse V
Since the K-shape is arranged so as to form a letter shape, the flow lines of persons inside and outside the inner peripheral frame 10 are secured. The vibration control brace is
Ultra-soft steel unbonded vibration control brace or oil damper brace can be used. Further, as the vibration control device, a vibration control wall such as an ultra-soft steel / viscous wall, a link panel such as an ultra-soft steel vibration control panel, a viscoelastic vibration control panel, and an oil damper can be used. The horizontal force at the time of the earthquake is mainly borne by the vibration control device 13.

The outer frame 20 includes outer columns 21, 21a and outer beams 22. Although the structure type is not limited, a ramen frame is preferable. In the case of a ramen frame, the number of columns can be reduced (large span) as compared with the conventional double tube structure.

The beam member 30 includes an inner frame 10 and an outer frame 2.
Connect with 0. PC in the longitudinal direction in the cross section of the beam member 30
The steel material 31 is wired to introduce prestress. Therefore, the beam structure of the beam member 30 can be reduced. As shown in FIG. 3, the PC steel material 31 is wired in a bow shape bulging downward at the center of the span in the member length direction, and generates a lifting force on the floor slab 40. However, the PC steel material 31 may be provided in the vicinity of the lower end of the beam member 30 in a straight line in the member length direction. The beam member 30 is preferably made of steel frame concrete or reinforced steel frame concrete. The concrete portion may be either precast concrete or cast-in-place concrete.

As the PC steel material 31 (PC steel strand, PC steel rod, etc.), unbonded PC steel material is generally used. However, other things may be used. For example, a PC steel material is embedded in a sheath filled with resin, and after the prestress is introduced at the construction site, the resin hardens and adheres between the PC steel material and the resin, and adheres between the sheath and concrete. May be expected. The method of introducing prestress may be either post-tension or pre-tension.

The fixing portions 32, 32 at both ends of the PC steel 31 wired in the beam member 30 are provided in a cross section of the beam member 30 near the span end at a distance t from the span end. (See FIG. 3A). That is, the beam member 3
The fixing parts 32, 3 at both ends of the PC steel material 31 wired inside
Numeral 2 is provided on the middle side of the span from the range where the yield hinge is formed at the span end of the beam member during an earthquake.
This will be described later.

A floor slab 40 formed between the inner frame 10 and the outer frame 20 is partitioned by beam members 30, 30, and each partitioned block forms a substantially square large span floor slab. I have. The beam members 30, 30 are substantially perpendicular to the side 20 a of the outer frame 20, and the corner 10 a (column 11) of the inner frame 10 and the side 20 a (of the outer frame 20 facing the inner frame 10). The outer slab 40 formed between the inner frame 10 and the outer frame 20 is divided into a corner block 40a and an intermediate block 40b, and Corner block 4
Oa and the intermediate block 40b each form a substantially square large span floor slab. The corner block 40a and the intermediate block 40b of the floor slab 40 are supported by the inner peripheral frame 10, the outer peripheral frame 20, and the beam members 30, 30, respectively.

The corner blocks 40a are located at the corners of the building 1, and are arranged at the four corners of the building 1, and the middle blocks 40b are located between the corner blocks 40a, 40a (sides of the building 1). The interior spaces of the corner block 40a and the intermediate block 40b are column-free and beam-free interior spaces, respectively. As a whole, there is no column between the inner frame 10 and the outer frame 20, and a so-called column-free space is formed. There are no beams or small beams that extend in the circumferential direction of the building (the direction crossing adjacent dwelling units). Therefore, the pillar,
There are few restrictions due to beams and walls, and the degree of freedom of planning such as floor plan and arrangement of dwelling units, and renewability in the future can be improved. Moreover, by introducing the prestress into the beam member 30, the beam structure of the beam member 30 can be formed small, and therefore, the beam shape does not protrude largely into the room, and a wide and open indoor space is provided. Can be formed.

FIG. 4 is an explanatory view (perspective view) schematically showing the mechanical structure of the corner block 40a and the intermediate block 40b. As described above, the PC steel material 31 is wired in the longitudinal direction in the cross section of the beam member 30 to introduce prestress. Lifting that supports the corner block 40a and the intermediate block 40b along a single virtual PC steel material axis in which a plurality of PC steel materials in the cross section of the beam members 30, 30 are prestressed (Ps2 in FIG. 4). A force (upward vertical force V2) is generated. For this reason, the beam members 30, 30 supporting the large span floor slab suppress vertical deformation (deflection) in the center of the span caused by a vertical load (self-weight, loading load, etc.) at all times, and have sufficient skeleton performance and excellent durability. It can demonstrate its properties.

Also, the P wires wired in the beam members 30, 30
The fixing portions 32, 32 at both ends of the C steel material 31 are provided in the cross section of the beam member 30 near the span end. That is,
Fixing portions 3 at both ends of PC steel material 31 wired in beam member
The reference numerals 2 and 32 are provided on the middle side of the span of the beam members 30, 30 from the range where the yield hinge is formed at the end of the span during the earthquake. At the time of the earthquake, the beam member 30 functions as a boundary beam that suppresses the horizontal deformation of the inner frame and exhibits a bending-back effect, generates a large bending moment at the span end of the inner frame, and yields a cross section. Even when the beam member 30 yields a cross section at the span end to form a yield hinge, the PC steel 31
Since the anchoring portions 32, 32 at both ends are located closer to the center of the span than the yield hinge generation position, the prestress of the PC steel material 31 is not reduced, and the vertical load on the floor or the like can be reliably supported. . Cracks in concrete,
Anchoring part 3 of PC steel due to yield of cross section of steel member of beam
There is no possibility that 2, 32 is loosened or the PC steel material is broken.

As described above, the corner block 40a and the intermediate block 40b form a large-span floor slab whose planar shape is a quadrilateral having a span (length) of S1, S2 and L1, respectively. Span (length) S1, S2 and L
Assuming that the long side is Ly and the short side is Lx, the slab side length ratio is defined as β (= Ly / Lx). In this embodiment, the corner block 40a and the intermediate block 40b are
Each has a square planar shape with β of about 1.0. The large span floor slab has a short side Lx of at least 8 m, preferably at least 9 m, more preferably at least 10 m.
While having a large span (large span length), β =
1.0 ~ 1.5 flat floor slab (one block)
Can be supported only by the inner frame 10, the outer frame 20, and the beam members 30 without providing columns inside the planar shape. For example, a large span in which the short side (Lx) exceeds 10 m is also possible. The present invention can be applied to floor slabs in which β exceeds 1.5. The substantially square planar shape means that the slab side length ratio is β (= Ly / Lx) = 1.
It refers to a quadrilateral of about 0 to 1.2.

A large span can be formed in which a room space equivalent to twice (two dwelling units) a general one dwelling unit can be arranged.
The door between the two dwelling units can be freely arranged and changed. Not only the layout of the indoor space of one dwelling unit, but also the planar shape of the dwelling unit, the versatility of the dwelling unit arrangement, and the flexibility are remarkably improved. A large-span floor slab vibration control structure can be obtained without using a conventional method such as thickening the floor slab or providing small beams.

At the top (roof) of the building 1, an inner peripheral frame 1
The top beam means 50 is provided at a position above the beam member 30. In this embodiment, a hat truss is employed as the top beam means 50, but the invention is not limited to the truss structure. A plate member or the like can be used. As shown in FIG. 5, the hat truss includes an inner frame 10 and a beam member 30.
, And are provided in a well-girder shape in plan view. By the top beam means 50, especially the run-out of the upper part is suppressed, and the rigidity of the building is improved.

The synergistic effect (coupling effect) of the vibration damping device 13 concentrated on the inner frame 10, the beam member 30 connecting the inner frame 10 and the outer frame 20, and the top beam means 50 In addition, the bending deformation of the building can be made uniform and effectively suppressed, and excellent seismic performance can be exhibited.
The effect of bending back by the beam member 30 and the top beam means 50 is effectively exerted, and the inner peripheral frame 10 is set to the shear deformation mode, so that the function of the vibration control device 13 is more effectively exerted.

The embodiment of the present invention has been described above.
The present invention is not limited to the above embodiment,
Various modifications and additions are possible within the scope of the present invention. The apartment house of the present invention can be applied to not only high-rise buildings but also low-rise buildings. It is not limited to a building having a square shape in a plan view.

[0025]

According to the first aspect of the present invention, a PC steel material is wired in the longitudinal direction in the cross section of the beam member connecting the inner frame and the outer frame, and prestress is introduced. Even when a slab is formed, the beam size can be reduced, the beam shape is prevented from protruding greatly into the room, and a wide and open indoor space can be formed. By connecting the inner frame and the outer frame by the beam members, deformation of the building can be suppressed, and sufficient frame performance and excellent durability can be exhibited. In addition, since the fixing portions at both ends of the PC steel material wired in the beam member are provided in the cross section of the beam member near the end of the span, the beam member connecting the inner peripheral frame and the outer peripheral frame becomes Even if the yield hinge is formed by cross-section yielding at the ends, the anchoring portions at both ends of the PC steel are located closer to the center of the span than the yield hinge occurrence position, so the prestress of the PC steel does not decrease, The vertical load on the floor or the like can be reliably supported. The vibration control device is placed on the inner frame of the building, and the top beam means is provided at the top of the building above the inner frame and the beam members. By the synergistic effect (coupling effect) of the device, the beam member, and the top beam means, the bending deformation of the building can be made uniform and effectively suppressed, and excellent seismic performance can be exhibited. The bending back effect by the beam member and the top beam means is effectively exerted, and the inner peripheral frame is set to the shear deformation mode, so that the function of the vibration control device is more effectively exerted.

[Invention according to claim 2] The floor slab formed between the inner peripheral frame and the outer peripheral frame is partitioned by the beam members, and each partitioned block is formed by a substantially square large span floor slab. Since it is formed, the degree of freedom of planning such as arrangement of dwelling units and floor plan, and renewability in the future are dramatically improved.
An open and spacious interior with excellent livability is obtained. The whole structure can be made simple and easy to design and construct.

[Invention according to claim 3] Since a column-free space is formed between the inner frame and the outer frame of the reference floor, an open space which is large and has excellent livability can be obtained. Arrangement,
The degree of freedom in planning such as floor plan, and renewability in the future are dramatically improved.

[Invention according to claim 4] Since the beam member is made of steel frame concrete or steel frame reinforced concrete, prestress can be easily introduced, and design and construction are easy.

[Invention according to claim 5] The PC steel is
It is wired in the shape of a bow swelling downward at the center of the span in the length direction of the beam member, and generates a lifting force on the floor slab, whereby the vertical load on the floor or the like can be reliably supported.

[Brief description of the drawings]

FIG. 1 is a side view showing a framework of a vibration control structure building 1 according to an embodiment of the present invention.

FIG. 2 is a plan view of a reference floor of the damping structure building 1 of the embodiment.

FIG. 3A is a cross-sectional view in the length direction of a beam member 30,
FIG. 3B is a cross-sectional view of the beam member 30 in the lateral direction.

FIG. 4 is an explanatory diagram of a mechanical structure of a corner block 40a and an intermediate block 40b of the floor slab 40.

FIG. 5: Building 1 showing top beam means (hat truss) 50
FIG.

FIG. 6 is a plan view of a reference floor in a conventional building.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Building 2 Building main body 10 Inner peripheral frame 13 Vibration control device 20 Outer peripheral frame 30 Beam member 31 PC steel material 40 Floor slab 50 Top beam means

Claims (5)

[Claims] 1. In a building having an inner peripheral frame located at the center of a building and an outer peripheral frame located at the outer periphery of the building, in a cross section of a beam member connecting the inner peripheral frame and the outer peripheral frame, in a longitudinal direction. Prestressing is introduced, and the anchoring portions at both ends of the PC steel wire wired in the beam member are provided in the cross section of the beam member near the span end to control the inner peripheral frame of the building. A seismic control structure building with a seismic device and a top beam at the top of the building above the inner frame and beam members. 2. A floor slab formed between an inner peripheral frame and an outer peripheral frame is partitioned by the beam members, and each partitioned block forms a substantially square large-span floor slab. The vibration control structure building described in. 3. Between the inner frame and the outer frame of the standard floor,
The building with a seismic control structure according to claim 1, which forms a column-free space. 4. The vibration control structure building according to claim 1, wherein the beam member is made of a steel frame concrete structure or a steel frame reinforced concrete structure. 5. The vibration damping structure according to claim 1, wherein the PC steel material is wired in a bow shape bulging downward at a center of the span in the length direction of the beam member, and generates a lifting force on the floor slab. building.