JP4071192B2 - Damping structure of building structure - Google Patents

Description

  The present invention relates to an earthquake-resistant structure capable of damping a steel column / beam constituting a framework of a building structure by resisting horizontal force such as seismic force.

  Many recently built building structures are earthquake-resistant structures. There are various configurations and installation modes of the vibration damping member used therefor, and conventional examples thereof will be described with reference to FIGS.

  FIGS. 12A, 12 </ b> B, and 12 </ b> C are brace-type damping structures using the damping brace 1. The damping brace 1 is configured by buckling and restraining an energy absorbing core material made of low yield point steel with a buckling restraining member such as a steel pipe via a buffer material (unbond material). And in the figure (a), the said damping brace 1 is installed on the diagonal of the frame structure of the column 2 and the beam 3 of a steel frame. In FIG. 2 (b), two damping braces 1 are installed in the shape of a cane on the shaft 2 and beam 3 shaft assembly. In FIG. 2C, two vibration-damping braces 1 are installed in a bracing manner on the shaft 2 and beam 3 shaft assembly.

  12 (a) to 12 (c), when a horizontal force of a certain level or more is applied to the steel column 2 and the beam 3, an extension force is applied to the vibration-damping brace 1, and the low yield point steel is used. As the energy absorbing core material yields, it suppresses the shaking of the building. Examples of the structure of the damping brace 1 include Japanese Patent Laid-Open Nos. 11-280294 and 2002-146905.

  FIG. 13 shows an example of a wall-type vibration damping structure in which a viscoelastic damper 4 is installed between the beams 3a and 3b on the upper and lower floors. The viscoelastic damper 4 is installed in a structural frame of a building in a columnar shape, and transmits horizontal vibrations acting on the beams 3a and 3b on the upper and lower floors to the viscoelastic damper 4 to be attenuated. In the viscoelastic damper 4, the upper split member 4a extending from the upper floor side beam 3a and the lower split member 4b extending from the lower floor beam 3b and the integral steel plate 5b are alternately meshed with each other. The viscoelastic body is mounted between them.

  According to the wall-type viscoelastic damper 4 of FIG. 13, when a horizontal force of a certain level or more acts on the steel column 2 and the beam 3, the horizontal force is transmitted from the upper and lower beams 3a, 3b to the steel plates 5a, 5b. The upper and lower steel plates 5a and 5b are displaced while the viscoelastic body 6 is sheared and deformed, so that the column and beam joint 7 are displaced, and the column 2, the upper and lower beams 3a and 3b, and the vibration suppression column 4 are displaced. Is deformed as indicated by a two-dot chain line in FIG. 13B, so that the vibration is gradually attenuated. As a structural example of the viscoelastic damper 4, there is JP-A-2002-256728.

JP-A-11-280294 JP 2002-146905 A JP 2002-256728 A

  The brace-type and wall-type damping members (energy absorbing members) shown in FIGS. 12 and 13 are obstructive visually or when a person moves if there are openings or doors such as building windows. In this case, (1) the energy absorbing member is not installed, (2) the position of the door is shifted, or (3) the energy absorbing member is complicatedly installed. In this way, there are few places where an energy absorbing member can be installed in one building because of the architectural plan, and if you do not want to show the energy absorbing member by design, the wall of the core part of an elevator, toilet, hot water room, stairs etc. Since it can be installed only in the area, there is a problem that the degree of freedom in design is small.

An object of the present invention is to provide a vibration control structure for a building structure that solves the above-described problems.

  In order to achieve the above object, the present invention is configured as follows.

The first invention pillars, a damping structure for a building structure comprised of a beam, a upper and lower sides of the beam, the beam is provided at an intermediate position between the pillars adjacent to each other, both sides of the bundle characterized in that installed horizontally vibration energy absorbing member between said post and.

  According to a second invention, in the first invention, the vibration energy absorbing member is a brace-type device such as a buckling-restrained brace, a viscoelastic damper, or an oil damper.

According to a third aspect of the present invention, in the first or second aspect of the invention, the vibration energy absorbing member has a first joining plate fixed to both ends thereof, and the pillar and the bundle have a first of the vibration energy absorbing member. The second bonding plate is fixed so that the end portions of the bonding plate and the ends are abutted, and the side surfaces of the first bonding plate and the second bonding plate are bonded via a splice plate. And

  According to a fourth aspect of the present invention, in the first to third aspects, the vibration energy absorbing member is installed at a site avoiding a building member such as a window, a door, or an opening.

  According to a fifth invention, in the first to third inventions, the vibration energy absorbing member is installed in a perimeter zone in which an air-conditioning facility is housed.

According to the present invention, in the middle part of the column in the steel column / beam structure, the beam is provided with a bundle, and the energy absorbing member is horizontally installed between the column via the bundle and acts on the steel column / beam. Since the horizontal force is controlled, (1) there are many places where the energy absorbing member can be installed, and the degree of freedom in design and structural design is expanded. (2) The displacement of the energy absorbing member is controlled by the movement of the bundle. Since it can amplify, an energy absorption member can be used effectively.

  Next, an embodiment of the present invention will be described in detail with reference to the drawings.

  FIGS. 1A and 1B are a schematic diagram of a vibration damping structure for a building structure according to the present invention and an explanatory diagram of a damping action of a structural frame when an earthquake occurs. In the same figure (a), in the structural framework in which the column 2 and the beam 3 are assembled by the column and the beam joint portion 7, on the upper and lower sides of each beam of the beam 3 on the upper floor and the beam 3 on the lower floor, and A bundle 8 is provided at an intermediate position between the adjacent pillars 2, and a vibration energy absorbing member 10 according to the present invention is installed between the bundle 8 and the pillars 2, thereby controlling the building structure. A vibration structure is built.

  In the above vibration damping structure, when a certain horizontal force is applied to the steel column 2 and the beam 3, the column / beam joint 7 is displaced, and the column 2 and the upper and lower beams 3 are shown in FIG. At this time, the vibration energy absorbing member 10 installed between the bundle 8 and the column 2 is alternately subjected to a tensile force and a compressive force, and absorbs vibration energy from a small earthquake to a large earthquake. Energy is absorbed by a damping member (details will be described later) in the member 10 to exert a damping action on the building.

  2 to 5 are side views showing examples of the installation of the vibration energy absorbing member 10, and FIG. 2 is provided with a bundle 8 on the upper and lower sides of the beam 3 as in FIG. The example which installed the vibration energy absorption member 8 between the pillars 2 of this is shown. FIG. 3 shows an example in which a bundle 8 is provided on the upper side of the beam 3 and a vibration energy absorbing member 10 is installed between the bundle 8 and the pillars 2 on both sides. FIG. 4 shows an example in which a bundle 8 is provided below the beam 3 and a vibration energy absorbing member 10 is installed between the bundle 8 and the pillars 2 on both sides. 2 to 4, the bundle 8 may be installed only on one of the left and right sides, but the illustration is omitted.

  2 to 5, a concrete slab 11 is placed on the upper side of the beam 3 to constitute an upper floor, and the lower side of the beam 3 constitutes a lower floor ceiling. . Although the length (height) of the bundle 8 is not limited, the vibration energy absorbing member 10 has a condition that it is installed avoiding a part where a building window or door is installed. In order to satisfy this condition, the vibration energy absorbing member 10 is required to be installed horizontally near the beam 3. In order to satisfy this condition, the bundle 8 is used, for example, by welding a H-shaped steel or the like cut into short dimensions to the beam 3.

  Further, when a horizontal force is applied to the column 2 and the beam 3, the bundle 8 swings from the O point (shown in FIGS. 1b and 2) to the left and right at the center tip, and the swing is the vibration energy absorbing member 10. A vibration damping action is produced by acting alternately as a tensile force and a compressive force. When the bundle 8 swings, the vibration energy absorbing member 10 is fixed to the tip of the bundle 8 so that the swing is amplified as much as possible and transmitted to the vibration energy absorbing member 10 as a tensile force and a compressive force. Is good. Therefore, the bundle 8 itself is provided so as to ensure a necessary length (height) in order to cause the tip of the bundle 8 to swing sufficiently.

  FIG. 5 shows a detailed structure of the vibration energy absorbing member 10 according to the present invention. In the figure, a vibration energy absorbing member 10 includes a concrete layer (not shown) covered with a cylindrical coated steel pipe 15 and a core material 17 made of a plate made of low yield point steel is buckled and restrained. An energy absorbing main body 19 having an unbonded layer 18 having an appropriate thickness is formed between the layers. The core member 17 may have a flat plate shape or a cross shape.

  Further, the end portion of the core member 17 exposed from the energy absorbing main body portion 19 and the pillar 2 and the bundle 3 are joined by a joining means 9 using a gusset plate. That is, the end portions of the first joining plate 30 fixed to the end portion of the core member 17 and the second joining plate 31 fixed to the pillar 2 and the bundle 8 are abutted with each other, and the splice plate 29 is applied to the side surface of each member. They are joined with bolts 28.

  In the above configuration, when a horizontal force acts on the pillar 2 and the beam 3, the displacement due to the horizontal force is amplified by the swing of the bundle 8 and transmitted to the vibration energy absorbing member 10, thereby exhibiting an effective damping action. Furthermore, the energy of an excessive earthquake or the like is absorbed by the yielding of the core material 17 made of a low yield point steel material by a horizontal force of a predetermined level or more. In addition, even if there is a certain restriction on the yield stress of the steel material constituting the core material 17, the energy absorption capacity can be set freely by changing the respective cross-sectional areas and lengths, the shape of the structure, the frame, etc. The energy absorption capability corresponding to can be obtained.

  6 to 10 show examples in which the coupling means for the vibration energy absorbing member 10 and the columns 2 and the bundle 8 is a pin coupling instead of the gusset plate type of FIGS. The configuration of the vibration energy absorbing member 10 is the same as that shown in FIGS. 2 and 6, FIGS. 3 and 7, and FIGS. 4 and 8 correspond to installation modes of the vibration energy absorbing member 10.

  The detailed structure of the pin coupling portion is shown in FIGS. 9 and 10 and will be described below. In FIG. 10, a bundle 8 made of H-shaped steel is also erected on the flange of the beam 3 made of H-shaped steel and fixed by welding 12. A joining plate 13 is fixed to the outside of the flanges on both sides, and a stiffener 14 is provided between the flanges.

  In the vibration energy absorbing member 10, a core material 17 made of a plate made of a low yield point steel is buckled and restrained by a concrete layer 16 covered with a cylindrical coated steel pipe 15, and an appropriate gap is provided between the core material 17 and the concrete layer 16. An energy absorbing main body 19 having an unbonded layer 18 with a sufficient thickness is formed.

  Furthermore, main body side joining members 20 are provided at both ends of the core member 17 exposed from the energy absorbing main body portion 19, and the main body side joining member 20 is formed of a cross-shaped cross plate. The first joint portion 22 in the auxiliary joined body 21 is joined to the main body side joining member 20 by welding 12 or the like. The auxiliary joined body 21 further has a second joined portion 23, and the second joined portion 23 is a joined plate provided in the bundle 8 on one end side (right end side in the example of FIG. 9) of the vibration energy absorbing member 10. 13 is connected by a connecting pin 24. On the other end side (the left end side in the example of FIG. 9) of the vibration energy absorbing member 10, the second joint portion 23 of the auxiliary joined body 21 is coupled to the joining plate 13 provided on the column 2 by the connecting pin 24.

  Also in the pin coupling type, when a horizontal force acts on the pillar 2 and the beam 3, the displacement due to the horizontal force is amplified by the swing of the bundle 8 via the connecting pin 24 and transmitted to the vibration energy absorbing member 10 and effective. Provides vibration control.

  FIG. 11A schematically shows an example in which the vibration energy absorbing member 10 is installed in the upper space 27 of the installation site of the door 25. FIG. 11B is a schematic diagram showing an example in which the vibration energy absorbing member 10 is installed in the perimeter zone 26 in which the air conditioning equipment is arranged on the outer periphery of the building.

  As described above, according to the embodiment of the present invention, the vibration energy absorbing member 10 can be installed in a place where it is not disturbed visually or when a person moves, so (1) the position of the door 25 does not have to be shifted. . (2) The installation mode of the vibration energy absorbing member can be simplified. (3) As a result, the degree of freedom of design and structural design in one building is expanded. Further, (4) since the displacement of the energy absorbing member can be amplified by the movement of the bundle 8, there are many practical advantages such as the vibration energy absorbing member 10 being effectively usable.

In the present invention, the vibration energy absorbing member 10 may be a viscoelastic damper or an oil damper in addition to the buckling restrained brace, and any type of brace type device can be used.

(A) is a schematic diagram of the vibration damping structure of a building structure according to the present invention, and an explanatory diagram of the damping action of the structural framework at the time of earthquake occurrence. It is an enlarged view of the 1st example of the example of installation of a vibration energy absorption member. It is an enlarged view of the 2nd example of the installation example of a vibration energy absorption member. It is an enlarged view of the 3rd example of the example of installation of a vibration energy absorption member. (A), (b) is the front view and top view which show an example of the vibration energy absorption member shown in FIGS. 2-4, (c), (d) is the top view and end elevation of the coupling part by a gusset. . It is an enlarged view of the 4th example of the example of installation of a vibration energy absorption member. It is an enlarged view of the 5th example of the example of installation of a vibration energy absorption member. It is an enlarged view of the 6th example of the example of installation of a vibration energy absorption member. (A), (b), (c) is the front view which shows an example of the vibration energy absorption member shown in FIGS. 6-8, a top view, and center part sectional drawing. It is a perspective view which shows an example of the joining structure of a vibration energy absorption member and a bundle. (A), (b) is explanatory drawing when a vibration energy absorption member is installed in the upper part of a door, and the case where a perimeter zone is installed. (A), (b), (c) shows a prior art example and is explanatory drawing of three examples of the brace type damping structure which installed the damping brace in the form of a brace. It is explanatory drawing of the wall type damping structure example which showed the other conventional example and installed the viscoelastic damper in the shape of a stud.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Damping brace 2 Column 3 Beam 4 Viscoelastic damper 4a Upper division member 4b Lower division member 5a Steel plate 5b Steel plate 6 Viscoelastic body 7 Column, beam junction part 8 Bundle 9 Joining means 10 by gusset 10 Vibration energy absorbing member
11 Slab 12 Welding 13 Joint plate
14 Stiffener
DESCRIPTION OF SYMBOLS 15 Coated steel pipe 16 Concrete layer 17 Core material 18 Unbond layer 19 Energy absorption member main-body part 20 Main body side joining member 21 Auxiliary joined body 22 1st junction part 23 2nd junction part 24 Connection pin 25 Door 26 Perimeter zone 27 Upper part space 28 Bolt 29 Splice plate 30 First joining plate 31 Second joining plate

Claims (5)

A vibration control structure of a building structure composed of columns and beams ,
A upper and lower sides of the front Kihari, the flux provided in an intermediate position between the pillars adjacent to each other,
And this was placed horizontally vibration energy absorbing member between the both sides of this beam with said post
Damping of building structures characterized by.   2. The vibration damping structure for a building structure according to claim 1, wherein the vibration energy absorbing member is a brace type device such as a buckling restrained brace, a viscoelastic damper, or an oil damper.   The vibration energy absorbing member has first joining plates fixed to both ends thereof,
  A second joining plate is fixed to the pillar and the bundle so that the first joining plate and the ends of the vibration energy absorbing member are abutted against each other.
  The side surfaces of the first joining plate and the second joining plate are joined via a splice plate.
  The vibration damping structure for a building structure according to claim 1 or 2, characterized by the above.   The said vibration energy absorption member is installed in the site | part which avoided building members, such as a window, a door, and an opening part, The damping structure of the building structure in any one of Claims 1-3 characterized by the above-mentioned. .   The said vibration energy absorption member is installed in the perimeter zone in which the air-conditioning equipment was accommodated, The damping structure of the building structure of any one of Claims 1-3 characterized by the above-mentioned.

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