JP2536680B2 - Construction method of elasto-plastic damper unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a method for constructing an elasto-plastic damper unit including an elasto-plastic damper and a jig for holding the elasto-plastic damper in a state in which an axial force is not applied to the damper by an external force. It is about.

[Problems to be Solved by the Invention]

Various elasto-plastic dampers that are structurally insulated and installed between structures that cause relative displacement, between structural members, etc., and that absorb the vibration energy that is input to the structures during an earthquake etc. and that are plate-shaped or rotor-shaped ing.

The construction method for arranging these elasto-plastic dampers between the members requires some ingenuity, and the present invention is intended to solve it.

[Means for solving the problem]

The elasto-plastic damper unit embodying the present invention restrains the movement of the damper in the axial direction by connecting one of the holding jigs for holding both ends in the mounting end direction of the damper to the damper so as to be relatively movable in the axial direction of the damper. In other words, the axial force is not applied to this, that is, the state in which only the shearing force is always applied is maintained, and the plastic deformation capability of the damper is sufficiently exerted.

This unit is fixed to a structural member or a non-structural member by gripping both ends of an elasto-plastic damper that is laid between structural members that are separated by a distance or between non-structural members, or between both of them. A pair of gripping jigs that form one unit, and the elasto-plastic damper is a rotor-shaped damper that elastically plastically deforms in the direction of the external force to absorb energy, and support parts at both ends supported by the gripping jig. The elasto-plastic damper whose entire length is accommodated in the embedding hole of the other holding jig is moved to fix one end of the support part to the holding jig on that side, and the other end to hold on that side as described above. It is inserted into the jig so that it can move in the axial direction.

〔Example〕

The present invention will be described below with reference to the drawings illustrating an embodiment.

The damper unit U of the present invention includes an elasto-plastic damper (hereinafter referred to as a damper) 1 that absorbs energy as shown in FIGS. 1-I and II, and structural members S ₁ and non-structural members that support both ends of the damper.
A pair of gripping tool 2 ₁ installed in S _2, 2 ₂ composed become Togagumi.

The damper 1 is FIG. 2, third relatively cross section and reduction as shown in the figure, the supporting portion 1b yield strength is supported on the gripping jig 2 _1, 2 ₂ at both ends and damper portion 1a which is lowered, 1b, and at least the damper portion 1a has a shape of a rotating body capable of functioning against an external force in an arbitrary direction within a plane perpendicular to the axis.

The damper portion 1a has an upright shape corresponding to a bending moment distribution that changes along the axial direction due to a shearing force acting between the supporting portions 1b and 1b perpendicularly to the axis.

That is, when the support portions 1b, 1b on both sides are both supported by being restrained from rotating with respect to the shaft and the damper portion 1a undergoes shear deformation, as shown in FIGS. In the case where the supporting portion 1b is supported in a shape and the rotation of the supporting portion 1b is not restrained, and bending deformation occurs in a cantilever manner, as shown in FIGS. Each is formed in a tapered bell shape. The damper portion 1a is processed, for example, by cutting an intermediate portion of a steel rod having a circular cross section.

In either case, since the elevation shape corresponds to the bending moment distribution, the damper portion 1a yields evenly over the entire axial length and efficiently absorbs energy.

Further, in particular, the damper 1 deformed into a cantilever type shown in FIG.
The support portion 1b on the relative movement side has a spherical shape or a shape close to it so that the movement and the rotational movement can be smoothly performed.

Each I in FIGS. 2 and 3 shows the case where the damper portion 1a is continuously processed from the support portion 1b, and when the diameter of the damper portion 1a is large,
II is a manufacturing example in which the intermediate portion having a smaller cross section than the supporting portion 1b is processed, and the diameter is smaller than that of the supporting portion 1b.
The size of these diameters is selected according to the energy absorption capacity to be set. Multiple dampers 1 with different capabilities
By combining the above, it is possible to arbitrarily and variably set the characteristics such as the overall rigidity, yield strength, and deformation performance of the dampers 1 gathering at one place.

Gripping tool 2 _1, 2 ₂ Figure 1, as shown in FIG. 4 positioned at both ends of the damper 1, but the support portion 1b, for embedding hole 2a this is inserted into the 1b side is bored , Either one (2 ₁ )
Fixes one support portion 1b of the damper 1, and the other (2 ₂ ) holds the local support portion 1b in a state where the relative movement of the damper portion 1a in the axial direction is allowed.

Gripping tool 2 ₁ side to fix the supporting portion 1b is injected the filling fixing member 3 of the mortar into the gap between the embedding hole 2a and the support portion 1b as shown in FIG. 1 II, or an embedded hole 2a Support section
A female screw and a male screw are formed in 1b, respectively, and the support portion 1b is fixed by means such as screwing the support portion 1b into the embedding hole 2a.

Embedding hole 2a of the gripping tool 2 ₂ side relatively moves has a deep anticipation of relative movement as shown is a slight clearance is provided between the outer periphery of the support portion 1b, in the gap If necessary, a friction reducing process such as enclosing a lubricant such as oil is added.

Figure 4 -I~III is considering workability incorporation into Concrete structural member S ₁ and the like of the damper unit U, the depth of the embedding hole 2a of the gripping tool 2 ₂ relative movement side of the damper 1 It shows an example of manufacturing when the size is settled so that the entire length can be accommodated.

 Reference numeral 2b is an anchor rod.

In this case, the damper unit U is disposed on the upper side of the gripping tool 2 ₂ relative movement side as shown in FIG. 1 -I, supported in a mold while storing the damper 1 to the gripping tool 2 in ₂ Installed and installed, structural member by concrete pouring and hardening
After fixing to S ₁ etc., as shown in II, the damper 1 is moved as it is by dropping or the like to the holding side, that is, the holding jig.
The damper unit U is fixed by fixing it to the specified position of 2 _1.
Is installed.

The damper unit U is laid between the structural members S ₁ and S _1, or between the non-structural members S ₂ and S ₂ or between both S ₁ and S _2, but the structural member S ₁ of this damper unit U, or A specific installation example on the non-structural member S ₂ will be described. In the figure, the damper unit U is shown in a simplified form in a part of a rod.

The embodiment of FIG. 5 is a structural member S that is connected to the upper and lower beams in the frame of pillars and beams and separated from each other at the middle part, separated from each other at a distance, does not bear a vertical load, and can resist only horizontal force. ₁ ,
This is the case where the damper unit U is installed between the walls of S ₁ . When the embodiment of FIG. 6 is similarly connected to the upper and lower beams and is installed between the studs which are structural members S ₁ and S ₁ which do not bear the vertical load, the embodiment of FIG. 7 is the structural member S ₁ . This is the case where it is installed between the beam and the panel of the curtain wall of the non-structural member S ₂ . In the embodiment of FIG. 7, the damper unit U is a portion where relative displacement is generated between the panel and the beam due to an external force, that is, in the case of the suspension type in which the panel is supported by the beam on the upper floor, the damper unit U is on the lower side. In the case of a floor-standing type supported by, it is installed on the upper side.

In the above-described embodiment, the damper unit U is installed with the axis of the damper portion 1a facing vertically, and as a result, the structural member straddling the damper unit 1a extends.
Acts on any horizontal relative displacement between S ₁ and non-structural member S ₂ .

The embodiment shown in FIG. 8 is similar to the embodiment shown in FIG. 6, and a damper portion is provided between the beams of the structurally insulated structural member S _{1 and} the beams of the structural member S _1.
This is a case where the axis of 1a is installed horizontally, and in this case the damper 1 functions at the time of vertical displacement between both beams and at the time of horizontal displacement.

In the above embodiments, the structural members S ₁ and non-structural members S ₂ other than the curtain wall panels are made of steel frame structure, reinforced concrete structure, or steel frame reinforced concrete structure.

〔The invention's effect〕

The present invention is as described above, and the damper is moved by fixing the position of the holding jig with the entire length of the damper being accommodated in the embedding hole of the other holding jig. Since one of the pair of gripping jigs for inserting and gripping both ends of the damper is connected to the damper in a state in which the relative movement of the damper part in the axial direction is allowed, arrangement and construction between the members is easy. Moreover, the damper is kept in a state of bearing only the shearing force and not the axial force, and is not destabilized by the relative movement between the structural members in the axial direction. Can be demonstrated.

[Brief description of drawings]

FIGS. 1-I and II are sectional views showing the construction of the construction process of the present invention, FIGS. 2-I and II, FIGS. 3-I and II are perspective views showing an example of manufacturing a damper, and FIG. -I is a perspective view showing an example of manufacturing a holding jig for storing the damper in the embedded hole, II,
III is the plan view, cross-sectional view, FIG. 5, FIG.
Each I in FIG. 7 is an elevation view showing an installation example of the damper unit, II is a sectional view thereof, and FIG. 8 is an elevation view. U: Damper unit, 1 ... Damper, 1a ... Damper part, 1b ... Support part, 2 ₁ , 2 ₂ ...... Gripping jig, 2a …… Embedding hole, 2b …… Anchor rod, 3 …… Filling Fixing material, S ₁ …… Structural member, S ₂ …… Non-structural member.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Naoki Tanaka 2-19-1 Tobita-cho, Chofu-shi, Tokyo Kashima Construction Co., Ltd. Technical Research Institute (72) Toshiyuki Fukumoto 2-19-1 Tobita-cho, Chofu-shi, Tokyo Issue Kashima Construction Co., Ltd. Technical Research Institute (56) References JP-A-62-220734 (JP, A) SAIKAI-SHO 63-81157 (JP, U)

Claims (1)

(57) [Claims] 1. A damper unit comprising an elasto-plastic damper straddled between members separated at a distance, and a pair of gripping jigs which grip both ends thereof and are fixed to the member. The elasto-plastic damper is composed of a rotor-shaped damper part and supporting parts at both ends supported by a holding jig. One of the holding jigs has an embedding hole, and the embedding hole accommodates the entire length of the elasto-plastic damper. In this state, one of the gripping jigs is fixed to one of the members, and then the elasto-plastic damper is moved in the axial direction of the damper part to fix the other of the supporting parts to the other of the gripping jigs. Then, one of the supporting portions is inserted into the embedding hole of the gripping jig so as to be relatively movable, and an elasto-plastic damper unit construction method.