JP3707003B2 - Seismic control building - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seismic control building in which seismic control dampers that absorb vibration energy during an earthquake are installed on each floor.
[0002]
[Prior art]
In recent years, seismic control structures are becoming common as building structures that can reduce seismic force and improve seismic performance. The seismic control structure is intended to reduce the response (vibration) of a building by incorporating a damping damper in the building and absorbing the seismic energy by the damping damper.
[0003]
[Problems to be solved by the invention]
By the way, when a damping damper is installed in a building, conventionally, a damping damper is installed between the upper and lower beams, so that when the interlayer displacement occurs, the damping damper is activated to absorb energy. It is normal. However, if the damping damper is simply installed between the upper and lower beams, a long-term axial force may act on the damping damper and the performance may not be maximized. For this reason, when installing a damping damper, it is necessary to install it in a form that does not allow excessive long-term axial force to act on it, or to adopt a damping damper that has a structure that does not act on long-term axial force. There was a problem that it became a factor of cost increase.
[0004]
In view of the above circumstances, the present invention makes it possible to avoid the application of excessive long-term axial force to the damping damper and to maximize its performance, and to improve workability and reduce costs. The purpose is to provide an effective seismic control building.
[0005]
[Means for Solving the Problems]
According to the first aspect of the present invention, in a vibration control building in which a vibration damping damper that absorbs vibration energy at the time of an earthquake is installed on each floor, a bending column that receives a horizontal shearing force due to interlayer deformation at the time of an earthquake is provided on each floor. As the seismic dampers, the seismic dampers are installed in the vertical direction through the beam and the seismic dampers are activated when the horizontal pillars are subjected to horizontal shearing force to absorb vibration energy. The steel damper that is installed in a form that receives the long-term axial force acting on the bending column and the panel damper that is installed in a form that can release the long-term axial force between the bending columns on the upper and lower floors are used in combination. Features.
[0006]
According to a second aspect of the present invention, in the damping building according to the first aspect of the invention, the steel damper is in the form of an H-shaped steel, the upper and lower portions of which are fixed to the bending column, and the intermediate portion is It is a shear yield portion that yields by receiving a horizontal shear force, and the web in the shear yield portion is formed by a shear panel made of mild steel or extra mild steel.
[0007]
According to a third aspect of the present invention, in the vibration-damping building of the first or second aspect, the panel damper is formed mainly of a flat shear panel made of mild steel or extra-soft steel, and the upper and lower parts thereof are against the bending column. It is characterized by being detachably bolted.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
1 to 3 show an outline of a seismic control building according to an embodiment of the present invention. As shown in FIG. 1, the seismic control building in the illustrated example has 29 floors above ground, and is composed of a beam 1 made of reinforced concrete (RC) and a pillar 2 made of precast concrete (PCa). A bending column 3 made of cast-in-place concrete is provided so as to be continuous in the vertical direction via the beam 1.
[0009]
As shown in FIGS. 2 (a) and 3 (a), the pillars 2 on each floor are joined to the upper and lower beams 1 and fixed by reinforcing bars 4. Each of the bending columns 3 on each floor is divided into an upper part 3a and a lower part 3b, and a vibration damper 5 is provided between them. The upper part 3a and the lower part 3b of the bending pillar 3 are respectively It has a flat cross-sectional shape that can be called a drooping wall and a waist wall, is firmly joined to the upper and lower beams 1, and is fixed by a reinforcing bar 6. In this vibration control building, when an interlayer deformation at the time of an earthquake occurs, a horizontal shearing force is applied to the bending column 3, and the vibration control damper 5 is activated thereby to absorb vibration energy.
[0010]
And in this embodiment, long-term axial force between the steel damper 5A installed in the form which receives the long-term axial force which acts on the bending column 3 as said damping damper 5 and the bending column 3 on the upper and lower floors is released. In combination with panel damper 5B installed in a possible form, the panel damper 5B is installed every 5 layers (in the example shown, 5th floor, 10th floor, 15th floor, 20th floor, 25th floor) Installs a steel damper 5A.
[0011]
The steel damper 5A is in the form of an H-shaped steel as shown in FIGS. 2 (b) to 2 (c), and the upper part and the lower part are embedded in the upper part 3a and the lower part 3b of the bending column 3, respectively. And the intermediate portion is exposed between them and is subjected to a horizontal shear force to yield, and the web in the shear yield portion is made of mild steel or extra mild steel. The shear panel 7 is formed, and the shear panel 7 yields due to the interlaminar displacement at the time of the earthquake, so that the vibration control effect is obtained by the hysteresis energy absorption. Reference numeral 8 is an anchor for fixing the lower end of the steel damper 5A to the lower beam 1 when the steel damper 5A is installed, 9 is a stud for reinforcing the fixing force to the bending column 3, and 10 is a bending column 3 It is the rib plate provided in the position of the end surface.
[0012]
As shown in FIGS. 3 (b) to 3 (d), the panel damper 5 </ b> B is mainly composed of a plate-like shear panel 11 made of mild steel or extra-soft steel whose upper and lower portions are wide, and mainly made of plain steel on one side. These ribs 12 are integrally welded. This panel damper 5B is used as a set of two sheets, and can be detached from the mounting members 13 with high-strength bolts while the mounting members 13 fixed to the bending column 3 are sandwiched from both sides by the upper and lower wide portions. Bolts are fastened in a state, and the central part of the shear panel 11 is shear yielded due to the interlayer displacement at the time of the earthquake. Reference numeral 14 denotes an anchor for fixing the attachment member 13 to the bending column 3, and 15 denotes a contact plate for fastening the shear panel 11 to the attachment member 13.
[0013]
In the seismic control building of this embodiment, as shown in FIG. 1, the above-mentioned panel damper 5B is replaced with the steel damper 5A every five layers based on the continuous arrangement of the above-mentioned steel damper 5A in the vertical direction. By arranging, it is possible to prevent an excessive long-term axial force from acting on both the steel damper 5A and the panel damper 5B.
[0014]
That is, the panel damper 5B is installed between the upper part 3a and the lower part 3b of the bending column 3 so as to be detachable by bolt fastening. In the middle stage, it is assumed that a long-term axial force acts on this panel damper 5B by temporarily fastening and releasing the fastening once the frame construction is completed and releasing the axial force and then performing the final fastening. Can be prevented. However, since the panel damper 5B is more expensive than the steel damper 5A and its construction is somewhat complicated, it is preferable to use this panel damper 5B on all floors, leading to an increase in cost and a decrease in workability. is not.
[0015]
On the other hand, since the steel damper 5A is installed in the form of being embedded in the bending column 3 at the time of the frame construction, it is inevitable that the long-term axial force acting on the bending column 3 acts on the steel damper 5A as it is. There is concern that the performance as the steel damper 5A cannot be sufficiently exhibited. Therefore, as described above, the panel damper 5B is installed instead of the steel damper 5A at a predetermined interval, and the panel damper 5B is installed after the frame construction is completed or temporarily tightened in the middle of the frame construction. In this case, the axial force between the upper and lower bending columns 3 can be released by the panel damper 5B by releasing the fastening once the frame construction is completed and releasing the axial force and then performing the final fastening. Therefore, the long-term axial force acting on each steel damper 5A can be greatly reduced, and as a result, the performance of the steel damper 5A can be sufficiently exhibited.
[0016]
As described above, the seismic control building of this embodiment is based on using the steel damper 5A that is relatively inexpensive and simple and easy to construct, and by adopting the panel damper 5B only at its essential points, It has both the advantages of both the steel damper 5A and the panel damper 5B, and it is possible to maximize the performance of the vibration damper 5 while avoiding deterioration of workability and cost increase, which is extremely effective.
[0017]
In addition, it is preferable and realistic that the panel damper 5B is installed at a ratio of about one layer to several layers as in the above embodiment, but the arrangement of the steel damper 5A and the panel damper 5B depends on the size, form, and requirements of the building. What is necessary is just to design optimally considering the vibration control performance and other conditions. Further, the steel damper 5A may be any one that is inexpensive and easy to construct, and the panel damper 5B may be any form that can release the long-term axial force. The damping damper 5 can be adopted, and the form of installation may be changed as appropriate. For example, it is possible to install the steel damper 5A as a bending column without incorporating the steel damper 5A into the bending column 3, and as the panel damper 5B, a viscous damper utilizing the viscous resistance of a viscous body or a viscoelastic body is also suitable. Can be adopted.
[0018]
【The invention's effect】
The invention of claim 1 is provided with damping dampers on the bending columns of each floor, as steel damping dampers installed in a form that receives a long-term axial force acting on the bending columns, and bending columns on the upper and lower floors. Advantages of both low-cost and easy-to-install steel dampers and panel dampers that can easily release long-term axial force It is possible to efficiently construct a seismic control building with excellent seismic control performance.
[0019]
The invention of claim 2 employs a steel damper that is in the form of an H-shaped steel and the web at the shear yielding portion is formed by a shear panel made of mild steel or extra mild steel, so that the steel damper is excellent as a damping damper In addition to having high performance, it is sufficiently inexpensive and can be firmly fixed just by burying the top and bottom in a bending column, so it has excellent workability and is ideal for application to the above-mentioned seismic control building. It is.
[0020]
The invention of claim 3 employs a panel damper that is formed mainly of a flat shear panel made of mild steel or extra mild steel and whose upper and lower parts are bolted so as to be detachably attached to a bending column. In addition to having excellent performance as a damping damper, the damper can easily release the long-term axial force, and is optimal for application to the above-mentioned damping building.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing an outline of a vibration control building according to an embodiment of the present invention.
FIG. 2 is a view showing an example of a steel damper.
FIG. 3 is a view showing an example of a panel damper.
[Explanation of symbols]
1 Beam 2 Column 3 Bending column 5 Damping damper 5A Steel damper (damping damper)
5B Panel damper (damping damper)
7 Shear panel 11 Shear panel

Claims (3)

In a vibration control building with vibration damping dampers on each floor that absorbs vibration energy during an earthquake, bending columns that receive horizontal shearing force due to interlayer deformation during the earthquake are installed on each floor, and the bending columns on each floor are connected via beams. The seismic dampers that act when the horizontal columns are applied to the bending columns on each floor and absorb the vibration energy are provided, and the long-term acting on the bending columns as those seismic dampers. A seismic control building comprising a steel damper installed in a form to receive axial force and a panel damper installed in a form capable of releasing long-term axial force between upper and lower bending columns. 2. The seismic control building according to claim 1, wherein the steel damper is in the form of an H-shaped steel, the upper and lower portions are fixed portions fixed to the bending column, and the intermediate portion is yielded by receiving a horizontal shearing force. A damping structure characterized in that it is a shear yielding part, and the web in the shearing yielding part is formed by a shear panel made of mild steel or extra mild steel. 3. The damping building according to claim 1 or 2, wherein the panel damper is mainly composed of a flat shear panel made of mild steel or extra mild steel, and its upper and lower parts are detachably bolted to the bending column. A seismic building characterized by

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