JP4056434B2 - Maximum shear force control type damping column and damping steel structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vibration suppression stud installed in a pillar / beam frame of a building structure, that is, a vibration suppression pillar incorporating a vibration damper that absorbs input vibration energy such as a horizontal force, in particular, a maximum shear force. The present invention relates to a vibration control column and a vibration control steel structure that can be controlled.
[0002]
[Prior art]
As for the conventional examples configured to control the maximum shearing force with the vibration damper installed in the pillar / beam frame of the building structure, for example, (1) JP-A-10-37515, (2) JP-A-9- A technique disclosed in Japanese Patent No. 268802 is known.
[0003]
The conventional example (1) is a structure in which a joint at one end of a viscoelastic brace arranged between opposing corners of a column / beam is joined via a preceding yield member, and an excessive brace load is applied by the preceding yield member. To cut. In the conventional example (2), the first and second oil dampers are arranged between the upper and lower two members, and the vibration energy of the building is always attenuated by the first oil dampers. 2 is controlled by an oil damper.
[0004]
Regarding the above, in the conventional example (1), the load caused by vibration acts in the axial direction of the viscoelastic brace and the preceding yielding member, and the preceding yielding member yields to avoid the damage of the viscoelastic brace. The present invention is different from the vibration damping pillar (details will be described later), and the structure for cutting an excessive load is different. The oil damper of the conventional example (2) also differs from the damping column of the present invention in terms of the overload cutting principle / mode.
[0005]
As another related art (3), there is JP-A-2003-295053 related to the present applicant and the present inventor. In this conventional example (3), in a pillar / beam frame of a building structure, a damping damping column in which a damping damper (vibration energy absorbing portion) is incorporated in a stiffness adjusting beam provided in parallel with the upper and lower beams is installed. Is. The vibration damping column is configured by combining the steel plates in the upper and lower divided column members in a comb-like shape via a viscoelastic body to constitute the vibration energy absorbing portion.
[0006]
In the conventional example (3), when a horizontal force is applied to the beam, the vibration is transmitted to the vibration energy absorbing portion in the damping column through the stiffness adjusting beam, and at this time, the steel plate is horizontal while shearing the viscoelastic body. It moves and exhibits a damping function, and exhibits a damping action as a damping pillar different from the conventional examples (1) and (2). In addition, by providing both ends of the stiffness-adjusting beam to which the damping inter-column is attached close to the column, the influence of the beam with an originally unclear rigidity is eliminated as much as possible, and the damping damper has the damping function as designed. I am trying to demonstrate it.
[0007]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-37515 [Patent Document 2]
JP-A-9-268802 [Patent Document 3]
JP 2002-295053 A
[Problems to be solved by the invention]
The present inventor will not damage the structure body due to the shear deformation of the damping damper part when a large earthquake occurs in the damping pillar arranged in the pillar / beam frame shown in the conventional example (3). In addition, research was conducted on a structure that does not damage the damping damper. In this regard, there is a conventional example (1) for the vibration suppression brace, but no proposal for improvement of the vibration suppression stud has been made.
[0009]
The present invention was devised based on the above, and when an excessive shear force is applied to the viscoelastic intermediate column, the peak of the excessive shear force is cut by plasticizing the plasticized portions connected in series. It is an object of the present invention to provide a vibration control pillar and a vibration control steel structure incorporating the same.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is configured as follows.
[0011]
The first invention is a damping damping column installed in a column / beam frame, in which the steel plates of the upper and lower divided column members are engaged in a comb-like shape, and a viscoelastic body is attached to the gap between the engagement portions to provide viscoelasticity. A steel plasticizing part is connected in series to the viscoelastic intermediate column, and the viscoelastic intermediate column and the steel plasticizing part are each provided with a joint with a structure to make the steel plastic. The split column member on the side connecting the parts has an H-shaped cross section, and the steel plasticizing portion is made of a steel material joined across one flange of the split column member and a joint to the structure. From the plasticized splice plate and the elastic splice plate that is joined across the other flange and the joint to the structure, bent when the damping stud is rotated by horizontal vibration, and the bent part becomes the center of rotation. characterized in that the configuration was.
[0012]
The second invention is a vibration control pillar installed in a pillar / beam frame, in which steel plates of upper and lower divided pillar members are engaged in a comb-like shape, and a viscoelastic body is attached to a gap between the engagement parts to provide viscoelasticity. A steel plasticizing part is connected in series to the viscoelastic intermediate column, and the viscoelastic intermediate column and the steel plasticizing part are each provided with a joint with a structure to make the steel plastic. The split column member on the side connecting the parts has an H-shaped cross section, and the steel plasticizing portion is made of a steel material joined across one flange of the split column member and a joint to the structure. It is pin-coupled across the plasticized splice plate, the web of the split column member and the connection part to the structure so that when the vibration-damping column is rotationally deformed by horizontal vibration, the pin connection part with the web is the center of rotation. and characterized by being configured from an elastic splice plate formed by providing That.
[0017]
According to a third invention, in the first or second invention, the plasticized splice plate is stiffened by a buckling restraining member.
[0018]
The fourth invention is the first to third any one of the, and wherein the plasticized splice plate is a low yield point steel.
[0019]
According to a fifth aspect of the present invention, there is provided a damping system that absorbs vibration energy by incorporating the maximum shear force control type damping interphase column in any one of the first to fourth aspects into a column / beam frame of each part of the structure. Featuring a vibration steel structure.
[0020]
[Action]
According to the present invention, the steel plasticizing part is connected in series to the viscoelastic studs to constitute the damping studs, so that the vibration energy is absorbed by the viscoelastic studs for horizontal vibration acting on the building. At the same time, when an excessive horizontal load that causes the shear force breakage of the viscoelastic intermediate column is applied, the steel plasticization part is plastically deformed, so that the peak of the excessive shear force is cut. Therefore, it is possible to avoid the damage of the viscoelastic studs and to smoothly attenuate the vibration energy acting on the structure. It can be easily replaced and restored again as a vibration control stud.
[0021]
Further, when the steel plasticized portion is the shear panel type of the second invention, the manufacture is easy. In the slit types of the third and fourth inventions, the peak cut load can be easily set by the number of slits, the width, and the height of the damping steel plate. In addition, by making it possible to detach and attach the damping steel plate of the fourth invention, replacement after plasticization is possible. Further, in the plasticized splice type of the fourth to seventh inventions, it is expected that the splice plate is axially yielded, and the axial yield is easier to control than the shear yield.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0023]
FIG. 1 shows a seismic resistance by constructing a vibration control pillar 2 according to the first embodiment shown in FIG. 2 on one floor of an existing building structure 1 in which a resident lives such as a multi-storey apartment (RC apartment house). The mode modified to reinforcement is shown. As shown in the figure, by installing the damping damping column 2 which is a seismic reinforcing member having a simple structure, the improvement effect of the building structure 1 is exhibited by the strength reinforcement and the damping effect of horizontal vibration. Moreover, by arranging the vibration control pillars 2 evenly on the existing building structure 1, the load on the main structure (structure body) is made uniform, and the strength and damping effect of the building structure 1 are further improved.
[0024]
More specifically, in FIG. 1, a wall 5 is provided between the ceiling part 3 (referred to as the upper floor side fixing part) and the floor part 4 (referred to as the lower floor side fixing part) on the upper and lower floors, and the inside of the wall 5. A kitchen, living room and other rooms are provided on the back side of the figure, and a predetermined part of the wall 5 is a door 6 that opens and closes an entrance leading to the inside and outside of the room, an opening and closing window 7 and a small light and wind. A window 8 or the like is provided.
[0025]
The details of the vibration damping stud 2 according to the first embodiment provided in the existing building structure 1 are shown in FIG. The vibration-damping studs 2 are roughly classified according to their functions. The viscoelastic studs 10, the steel plasticizing part 12 connected in series to the lower part, the upper part of the viscoelastic studs 10 and the lower part of the steel plasticizing part 12 are It is comprised from the upper junction part 11 and the lower junction part 13 to the structure main body connected.
[0026]
The viscoelastic intermediate column 10 is configured by mounting a viscoelastic body 22 in a gap between steel plates engaged in a comb-teeth shape of divided intermediate column members 10a and 10b divided vertically. In the illustrated example, the lower divided stud member 10a has a H-shaped cross section with a predetermined height, has a flange 15 at both ends of the web 14, and has a first horizontal joining plate 16 at the lower end. It is provided and configured. The upper split pillar member 10b has an H-shaped mounting portion 19 having flanges 18 at both ends of the web 17, and the upper portion of the steel plate 20 applied to both surfaces of the web 17, and fixing bolts ( (Not shown) is inserted and the nut is fastened.
[0027]
The steel plate 20 is arranged with a slight gap on both surfaces of the web (steel plate) 14 of the lower divided pillar member 10a, and a viscoelastic body 22 is mounted so as to fill the gap. The viscoelastic body 22 has pressure-sensitive adhesiveness, and is pressure-sensitively bonded to the side surfaces of the steel plate 20 and the web 14. The width of the steel plate 20 is smaller than the interval width between both flanges 15 of the lower divided stud member 10 a, and a movable interval 23 is formed between both side edges of the steel plate 20 and both flanges 15. Moreover, the lower end part 20a of the steel plate 20 extends to the vicinity of the lower end part of the lower divided stud member 10a.
[0028]
Accordingly, the lower divided pillar member 10a and the upper divided pillar member 10b are attenuated in vibration energy by relatively moving horizontally while deforming the viscoelastic body 22 by shearing force in a range where both side edges of the steel plate 20 contact both flanges 15. The effect is played. In the above description, by appropriately setting the width and length of the steel plate 20 and the web 14, and the area and layer thickness of the viscoelastic body 22, a viscoelastic damper adapted to the intended earthquake scale can be configured.
[0029]
As shown in FIG. 2, the steel plasticizing portion 12 according to the first embodiment is connected in series to the lower divided stud member 10a. The steel plasticizing portion 12 has an H-shaped cross section, and includes flange portions 25 on both side edges of the web portion 24 having a predetermined width and a predetermined height. The flange portion 25 is configured to be able to maintain an elastic state so as to bear the bending moment of the damping stud 2 when horizontal vibration occurs, and the web portion 24 has a low yield so as to be plasticized by bearing a shearing force. Consists of point steel.
[0030]
The upper end portion of the steel plasticizing portion 12 is welded to the lower end portion of the lower split column member 10a via the first horizontal joining plate 16, and the lower end portion is below the structure via the second horizontal joining plate 26. It is welded and joined to a lower joint part 13 for fixing to a lower floor side fixing part such as a floor beam or floor. The lower joint portion 13 may have an arbitrary structure, but is composed of a joined steel plate 13a having a large number of bolt holes 21 in the figure.
[0031]
An upper joint 11 for fixing to an upper floor fixing portion such as a beam or a ceiling on the upper floor of the structure is welded to the upper end portion of the upper divided pillar member 10b via a third horizontal joint plate 27. . The upper joint portion 11 may have an arbitrary structure, but is constituted by a joined steel plate 11a having a large number of bolt holes 21 in the drawing.
[0032]
FIG. 9 also shows a mode in which the vibration suppression pillar 2 according to the first embodiment is installed inside the pillar 28 and the frame of the beam 29. 2 and 9, with respect to normal horizontal vibration acting on a building due to an earthquake or the like, the upper and lower divided column members 10 a and 10 b in the viscoelastic intermediate column 10 are relatively left and right while shearing and deforming the viscoelastic body 22. By repeating the movement, vibration energy can be absorbed and attenuated. Further, when an excessive horizontal load is applied to cause the shear force fracture of the viscoelastic intermediate column 10, the web portion 24 of the low yield point steel in the steel plasticizing portion 12 is plastically deformed, thereby causing the peak of the excessive shear force. This prevents the viscoelastic intermediate column 10 from undergoing excessive shear deformation and avoids its damage. Moreover, it can bear with the flange part 25 comprised so that an elastic state could be maintained with respect to the bending moment of the damping pillar 2 at this time.
[0033]
After the horizontal vibration due to an earthquake or the like has subsided, it is possible to easily replace only the steel plasticizing portion 12 with a simple operation and restore it again as a new vibration control stud. As a characteristic advantage of the first embodiment, the steel plasticizing portion 12 is a shear panel type, and is easy to manufacture.
[0034]
Next, Embodiments 2 to 5 will be described. The main difference from Embodiment 1 is the structure of the steel plasticizing portion 12, and the basic structure of the viscoelastic intermediate column 10 is the same in each embodiment. The same. Therefore, the following description focuses on the different configurations.
[0035]
3 (a) and 3 (b), the steel plasticizing portion 12 of the second embodiment is formed by dividing a vibration-damping steel plate 31 formed with a plurality of vertically long slits 30 forming a plasticized portion into an H-shaped section. The upper and lower surfaces of the damping steel plate 31 are fixed to the web 14 with bolts (not shown) that are inserted into the bolt holes 21 in contact with both side surfaces of the lower portion of the web 14 of the column member 10a. Further, a horizontally long hole 32 reaching the both flanges 15 is formed in the web 14 at the intermediate portion in the vertical direction of the damping steel plate 31, and the web 14 is formed as if the web 14 at the vertical position of the horizontally long hole 32 is divided.
[0036]
In the second embodiment, the cross sections of the lower divided pillar member 10a and the lower joint 13 are both H-shaped, and the joining plate 33 is applied so as to sandwich the webs 14 and 13b and the flanges 15 and 13c of the upper and lower members. The lower joint portion 13 is configured by bolting the contact portion. Similarly, the cross section of the upper split column member 10b and the upper joint portion 11 are both H-shaped cross sections, and the joining plate 34 is applied so as to sandwich the webs 14 and 11c of the upper and lower members and the flanges 15 and 13c. The upper joint portion 11 is configured by detachably bolting the contact portion.
[0037]
In the second embodiment, when an excessive horizontal load that causes the shear force destruction of the viscoelastic intermediate column 10 in the vibration suppression column 2 is applied, the vibration suppression steel plate 31 having the slit 30 of the steel plasticizing portion 12 is plastically deformed. Thus, the peak of the excessive shearing force is cut, thereby preventing the viscoelastic intermediate column 10 from being excessively sheared and avoiding the damage.
[0038]
Therefore, after the horizontal vibration due to an earthquake or the like has subsided, only the steel plasticizing portion 12 can be easily replaced by a simple operation, and can be restored again as a new damping damping column 2. The characteristic point of Embodiment 2 is that the damping steel plate 31 is of a slit type, so that the peak cut load can be easily set by the number of slits, the width, and the height. Furthermore, replacement after plasticization is possible by making the damping steel plate 31 into a detachable bolt joint.
[0039]
4 (a) and 4 (b), the steel plasticizing portion 12 of the third embodiment is arranged vertically on the web 14 of the lower divided column member 10a having an H-shaped cross section instead of the vibration-damping steel plate 31 in the second embodiment. Shows an example in which a plurality of long slits 43 are formed. In the third embodiment, the portion having the slit 43 of the steel plasticizing portion 12 is plastically deformed to cut the peak of excessive shearing force, thereby exerting excessive shear deformation on the viscoelastic intermediate column 10. There is no. Since other configurations and operations are the same as those of the second embodiment, the same elements are denoted by the same reference numerals and description thereof is omitted.
[0040]
In the fourth embodiment shown in FIGS. 5, 6A, and 6B, the cross sections of the lower divided inter-column member 10a and the lower joint portion 13 are both H-shaped cross sections and are abutted against each other. And the steel plasticizing part 12 is arrange | positioned on each outer surface across one flange 15a of the lower division | segmentation pillar member 10a and one flange 13d of the lower junction part 13, and it joins with the some volt | bolt 35. The low-yield point steel plasticized splice plate 36, the other flange 15b, and the other flange 13e of the lower joint 13 are arranged on the inner and outer surfaces and joined with a plurality of bolts 35. The elastic splicing plate 37 is bent when the damping pillar 2 is rotated and deformed by horizontal vibration, and the bent portion serves as a rotation center.
[0041]
The plasticized splice plate 36 is formed with a constricted portion 36a, and a buckling restraining material 41 is provided on the outer surface as necessary. In addition, a lateral restraining member 42 is provided for preventing lateral deflection of the constricted portion 36a. Further, ribs 38 are provided in the standing direction on the outer surface of the outer elastic splice plate 37a disposed on the outer surface of the flange 13e. Moreover, since the structure of the upper junction part 11 is the same as Embodiment 2, the same code | symbol is attached | subjected to the same element and description is abbreviate | omitted.
[0042]
In the fourth embodiment, when an excessive horizontal load that causes the shear force fracture of the viscoelastic intermediate column 10 in the vibration suppression column 2 is applied, the plasticized splice plate 36 made of low yield point steel is excessively deformed. The peak of the shearing force is cut, so that the shearing force is not exerted on the viscoelastic intermediate column 10 and the damage can be avoided. Further, at this time, when the damping column 2 is rotationally deformed by horizontal vibration, the elastic splice plate 37 is bent and the bent portion becomes the center of rotation, and the peak of the excessive shear force acting on the viscoelastic column 10 is also observed at this point. Contributes to smooth cutting. A characteristic point of the fourth embodiment is that a peak cut of an excessive shear force is expected for the axial yield of the plasticized splice plate 36 on one side, and the axial yield is easier to control than the shear yield.
[0043]
7, FIG. 8 (a), (b) shows Embodiment 5, and the steel plasticization part 12 straddles one flange 15a of the lower division | segmentation pillar member 10a, and one flange 13d of the lower junction part 13. FIG. The fourth embodiment is the same as the fourth embodiment in that a plasticized splice plate 36 made of low-yield-point steel is provided on the outer surface of the lever and joined by a plurality of bolts 35.
[0044]
In the steel plasticizing portion 12 of the fifth embodiment, elastic splice plates 37 are disposed on both sides of the web 14 of the lower divided column member 10a and the web 13b of the lower joint portion 13, and the elastic splice plate 37 The web 14 of the lower divided column member 10a is coupled by a pin 39 which becomes a rotation center when the damping column 2 is rotationally deformed by horizontal vibration, and the elastic splice plate 37 and the web 13b of the lower joint portion 13 include a plurality of pins. They are connected by connecting pins or bolts 40, and these configurations are different from those of the fourth embodiment. Other configurations are the same as those of the fourth embodiment.
[0045]
Therefore, in the fifth embodiment, when an excessive horizontal load that shears and breaks the viscoelastic stud 10 in the damping stud 2 is applied, the plasticized splice plate 36 made of low yield point steel is plastically deformed. The peak of the excessive shear force can be cut and damage to the viscoelastic stud 10 can be avoided. When the damping stud 2 is rotationally deformed, the pin 39 that joins the elastic splice plate 37 and the web 14 becomes the center of rotation, and the peak of the excessive shear force acting on the viscoelastic stud 10 is smoothly cut also at this point. Can contribute. Also in the fifth embodiment, the peak cut of the excessive shear force is expected in the axial yielding of the plasticized splice rate 36 on one side as in the fourth embodiment, and the axial yielding is easier to control than the shear yielding.
[0046]
In addition, it is included in the scope of the present invention to appropriately change the design of the configuration shown in each embodiment.
[0047]
【The invention's effect】
According to the present invention, the plasticizing part is connected in series to the viscoelastic studs to form the damping stud, so that the horizontal energy acting on the building can absorb the vibration energy by the viscoelastic studs. When an excessive horizontal load that breaks the shearing force of the viscoelastic intermediate column is applied, the plasticized part is plastically deformed to cut the peak of excessive shearing force, so that excessive shear deformation is applied to the viscoelastic intermediate column. Therefore, damage to the viscoelastic studs can be avoided, vibration energy acting on the structure can be damped smoothly, and after the earthquake, etc., the vibration can be controlled again by a simple replacement of the plasticizing part. It can be restored as a stud.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a front view in which a vibration control stud according to a first embodiment is constructed on one floor of a building structure such as an existing multi-storey apartment (RC apartment house).
FIGS. 2A and 2B are a front view and a right side view of a vibration damping stud according to the first embodiment. FIG.
FIGS. 3A and 3B are a front view and a right side view of a vibration suppression stud according to a second embodiment.
4A and 4B are a front view and a right side view of a vibration damping stud according to a third embodiment, respectively.
FIG. 5 is a front view of a vibration damping stud according to a fourth embodiment.
6A and 6B are a right side view and a left side view of a vibration damping stud according to Embodiment 4 of FIG.
FIG. 7 is a front view of a vibration damping stud according to a fifth embodiment.
FIGS. 8A and 8B are a right side view and a left side view of a vibration damping stud according to Embodiment 5 of FIG.
FIG. 9 is a front view of a mode in which the vibration suppression studs according to the first embodiment are installed in a pillar / beam frame.
[Explanation of symbols]
1 Building Structure 2 Damping Pillar 3 Ceiling (upper floor fixed part)
4 floors (upper floor fixed part)
5 Wall 6 Door 7 Open / close window 8 Small window 10 Viscoelastic stud 10a Lower split stud member 10b Upper split stud member 11 Upper joint 11a Joined steel plate 11b Web 11c Flange 12 Steel plasticizing part 13 Lower joint 13a Joined steel sheet 13b Web 13c Flange 13d One flange 13e Other flange 14 Web 15 Flange 15a One flange 15b Other flange 16 First horizontal joining plate 17 Web 18 Flange 19 Mounting portion 20 Steel plate 20a Steel plate lower end portion 21 Bolt hole 22 Viscoelastic body 23 Movable distance 24 Web portion 25 Flange portion 26 Second horizontal joint plate 27 Second horizontal joint plate 28 Column 29 Beam 30 Slit 31 Damping steel plate 32 Horizontal elongated hole 33 Joint plate 34 Joint plate 35 Bolt 36 Plasticized splice plate 37 Elastic splice plate 38 Rib 39 Pin 40 Pin 41 Buckling restraint material 42 Lateral restraint member 43 Slit

Claims (5)

A vibration-damping pillar installed in a pillar / beam frame ,
Meshing the steel plates above under Bunkatsu Columns in a comb shape, thereby constituting a viscoelastic studs wearing the viscoelastic body in a gap mating portion, connecting the steel plasticized section in series to the viscoelastic studs The viscoelastic intermediate column and the steel plasticized part are each provided with a joint with the structure ,
The divided column member on the side connecting the steel plasticized portion has an H-shaped cross section,
The steel plasticizing portion includes a plasticized splice plate made of steel joined across one flange of the divided column member and a joint to the structure, and another flange and a joint to the structure. A maximum damping force control type damping pillar characterized in that it is composed of an elastic splice plate that is joined across and is bent when the damping stud is rotated and deformed by horizontal vibration, and the bent portion serves as the center of rotation . A vibration-damping pillar installed in a pillar / beam frame,
  The steel plates of the upper and lower divided pillar members are meshed in a comb-like shape, a viscoelastic body is installed in the gap between the meshing portions to constitute a viscoelastic stud, and a steel plasticizing part is connected in series to the viscoelastic stud. The viscoelastic intermediate column and the steel plasticized part are each provided with a joint with the structure,
  The divided column member on the side connecting the steel plasticized portion has an H-shaped cross section,
  The steel plasticizing portion includes a plasticized splice plate made of steel joined across one flange of the split column member and a joint portion to the structure, and the web and structure of the split column member. Maximum shearing, characterized in that it is composed of an elastic splice plate that is pin-coupled across the connecting part and is provided so that the pin coupling part with the web is the center of rotation when the damping stud is rotated and deformed by horizontal vibration Force-controlled vibration control pillar. Claim 1 or 2 maximum shear force-controlled damping studs according characterized by stiffening the plastic of splice plates in buckling restraint member. The maximum shearing force control type damping pillar according to any one of claims 1 to 3 , wherein the plasticized splice plate is a low yield point steel. A damping steel structure that absorbs vibration energy by incorporating the maximum shear force control type damping inter- plexing column according to any one of claims 1 to 4 into a pillar / beam frame of each part of the structure.

Images