JPH086780B2 - Elasto-plastic damper mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention effectively installs an elasto-plastic damper between structural members or the like which are insulated from each other only at a time of relative displacement in a specific direction between both members. The present invention relates to an elasto-plastic damper mounting structure.

[Problems to be Solved by the Invention]

The applicant has proposed many elasto-plastic dampers that are structurally insulated and installed between structures that cause relative displacement and between structural members, and that absorb the vibration energy input to the structures during an earthquake, etc. are doing.

Due to its shape, the damper of this rotating body functions in any direction of the plane perpendicular to the axis, and in addition, it has a bell shape when one end is free and the other end is fixed, and a drum when both ends are fixed. It has a small shape, and has the advantage of high energy absorption efficiency, etc., by having a rectangular shape and an elevation shape that approximates the bending moment distribution due to external force.

Since the damper of this shape can resist only relative displacement in the plane perpendicular to the axis, the difference in relative displacement in the horizontal plane such as between structures is the target of energy absorption, and the axis between them is It is installed vertically, and because it is necessary to avoid the occurrence of unstable phenomena such as buckling due to axial force, vertical displacement due to increase in relative horizontal displacement, that is, forced deformation due to relative displacement in the axial direction Will be installed.

However, in the installation method focusing on the relative horizontal displacement described above, the relative displacement difference between the two does not become large unless the vibration characteristics of the structures straddled by the damper are different.
The function of the damper cannot be effectively brought out, and its application range is limited to structures having some difference in natural frequency.

In addition, it may not always be effective to apply the displacement difference in two directions (X, Y directions) in the horizontal plane to the damper at the same time, and it is limited to any one specific direction or each of the two directions. In some cases, changing the characteristic value of the damper is effective in absorbing vibration energy.

Furthermore, the damper can be moved in one horizontal direction (X direction or Y direction).
Direction) and the vertical direction (Z direction) in the XZ plane, or Y-
In some cases, it can be expected that the effect of absorbing energy can be obtained by independently acting on the Z plane, or it may be more effective to use a damper effective on the XZ plane or the YZ plane in combination.

As described above, the present invention was made for the purpose of devising the installation method of the elasto-plastic damper of the invention of the already filed invention to achieve more efficient energy absorption, and a new method of mounting the damper to achieve this is proposed. It is what

[Means for solving the problem]

In this invention, an elasto-plastic damper is installed between structures with its axis horizontal, one end is fixed to one side, and the other end is connected to the other side so as to be relatively movable in the axial direction and in the horizontal direction perpendicular thereto. By constraining only relative movement in the vertical direction, the damper is actuated against a vertical displacement in which the displacement becomes large when the vibration properties of structures over which the damper straddles do not differ, It enables you to take out the function effectively.

In addition, an elasto-plastic damper is installed between the overhanging members that horizontally extend from each structure, with the axis vertical, and one end is fixed to one side and the other end is opposed to the other side in one direction in the horizontal plane. By connecting movably and restricting relative movement in only one horizontal direction perpendicular to that direction, the damper can be operated only in one specific direction or by changing the characteristic value of the damper in each of two directions. , Give the energy absorption effect of the whole structure.

〔Example〕

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

The present invention relates to a structure, such as a structure, which can separate an elastic-plastic elasto-plastic damper (hereinafter referred to as damper) 1 as shown in FIG. 7 with a distance, or between non-structural members, or both. It is installed in an effective state with respect to relative displacement in a specific direction between them (represented by the structural member S and the like). In the following embodiments, an example of a structure as the structural member S is shown as a member to which the damper 1 is connected.

As shown in the figure, the damper 1 has a relatively reduced cross section,
The damper part 1a has a reduced yield strength, and the support parts 1b and 1b supported by the structural member S and the like at both ends thereof are provided.
a has the shape of a rotating body capable of acting on an external force in an arbitrary direction in a plane perpendicular to the axis.

Further, the damper portion 1a has a bell shape as shown in FIG. 9-I, which corresponds to a bending moment distribution that changes along the axial direction by a shearing force acting perpendicularly to the axis between the support portions 1b, 1b.
Alternatively, it has an hourglass-shaped elevational shape as shown in II, and yields evenly over the entire length in the axial direction by an external force, and efficiently absorbs energy.

In the former case, the support part 1b on the tapered side is connected without being restricted by the rotation of the damper part 1a with respect to the shaft, and in the latter case when it is deformed in a cantilever manner, in the latter case, both support parts 1b, 1b are restricted by the rotation and connected. This is a manufacturing example in the case of being deformed into a beam with both ends fixed.
In the case of the former, the support portion 1b on the side where rotation is not restricted has a spherical shape or a shape close to that, and the support portion 1b on the other side is formed into a flange shape, and both support portions 1b and 1b of the latter are both formed into a flange shape. It is formed. In the following embodiments, the usage example of the bell-shaped damper 1 is mainly shown.

 First, the invention described in the first claim will be described.

As shown in FIG. 1, the present invention has a structure in which a damper 1 is installed between structural members S, S, etc., with a shaft of a damper portion 1a being horizontal,
One of 1b and 1b is fixed to the one side, and the other is connected to the other side in the axial direction and in the horizontal direction perpendicular thereto, that is, in the horizontal plane (X, Y plane) so as to be relatively movable, and in the vertical direction (Z This is a mounting structure that is effective only when there is no difference in the vibrational characteristics of the adjacent structures, because only the relative movement in the (direction) is restricted.

The support portion 1b on the fixed side of the damper 1 is directly attached to the structural member S or the like.
Alternatively, the supporting portion 1b on the other end side is indirectly fixed via the projecting member 2 and the like, is installed so as to project from the structural member S, and is connected to the gripping member 3 that grips the supporting portion 1b.

This gripping member 3 is, for example, as shown in Fig. 2-I showing the details of Fig. 1 and II showing a cross section of the damper 1 in the axial direction, for example, the support portion 1b is sandwiched from above and below, and the holding member 3 is parallel to allow movement in a specific direction. It consists of restraint pieces 3a, 3a, and the relative displacement in the axial direction of the damper part 1a between the structural members S, S, etc. and the relative displacement in the horizontal direction perpendicular thereto, that is, the damper at the time of relative displacement in the horizontal plane (X, Y plane) The supporting portion 1b is supported in a state where the relative movement of 1 is not restricted.

As a result, the damper 1 resists an external force only when the structural members S and S are relatively displaced in the vertical direction.

As shown in FIG. 1-III, the present invention is effective for a structure in which the vibration properties are almost the same, the horizontal relative displacement does not change during vibration, and the vertical displacement is larger. The damper 1 is bent and sheared according to the difference and absorbs vibration energy.

FIG. 3 shows the installation state of the drum-shaped damper 1.

When the damper 1 has an hourglass shape, the gripping member 3 is a support portion on that side.
Hold 1b in a state of being relatively deformed in the vertical direction while being parallel to the original position.

 Next, the invention described in the second claim will be described.

As shown in FIG. 4, the present invention includes a damper 1 and a damper portion.
The axis of 1a is installed vertically, one of the supporting portions 1b and 1b is fixed to one side of the structural member S, S, etc., and the other is to the other side in one direction in the horizontal plane (X direction or Y direction). Is connected so as to be capable of relative movement, and only relative movement in a direction (Y direction or X direction) orthogonal to that direction in the horizontal plane is restricted.

In the present invention, the damper 1 includes structural members S, S as shown in the drawing.
The supporting portion 1b, which is installed horizontally from the same and extends horizontally between the overhanging members 2, 2 and is not fixed, is grasped by the grasping member 3 fixed to the overhanging member 2.

The gripping member 3 is composed of two restraining pieces 3a, 3a juxtaposed to each other as shown in FIG.
Relative movement in one direction (X direction or Y direction) is constrained, and the damper 1 is operated at the time of relative displacement between the structural members S, S, etc. in that direction. In FIG. 6, the both ends of the restraint pieces 3a, 3a are connected to each other to make the shape of the gripping member 3 oval, and the damper 1
An example in which the function of the stopper after the movement in the relative movement direction is also provided and the function of the damper 1 is restored in the subsequent deformation will be described.

In the illustrated embodiment, the gripping member 3 is arranged so that the damper 1 functions with respect to the relative displacement between the structural members S, S in the opposite direction (X direction). , The structure is effective when the displacement difference between the opposing directions becomes large, but the damper 1 can be displaced in the direction perpendicular to the opposing direction (Y direction) by changing the direction of the restraining piece 3a.
Can also be used.

In the embodiment shown in FIG. 4, the supporting portion 1b on the side of the gripping member 3 is preferably in contact with the overhanging member 2, but the structural members S, S
If there is a possibility of relative displacement in the vertical direction between the equal parts, increase the height of the restraining piece 3a of the gripping member 3 so as not to apply an axial force to the damper 1 and to some extent between the restraining piece 3a and the supporting portion 1b. Clearance is provided.

In that case, the damper 1 is in a state in which relative movement in the vertical direction is also possible.

In the present invention, since the damper 1 functions only when the relative displacement in one specific direction in the horizontal plane is performed, the characteristics of the damper 1 are changed with respect to the placement method that functions in two directions in the horizontal plane.

〔The invention's effect〕

The present invention is as described above, and since the plastic breaker having the function of absorbing energy against relative displacement in two directions is installed by specifying the operating direction thereof, the vibration characteristics of the adjacent structures are different. When there is no difference or when the relative displacement difference in a certain direction is assumed to be large, the displacement in that direction can be effectively used to absorb energy and positively converge the vibration. Is possible.

[Brief description of drawings]

1-I and II are an elevation view and a plan view, respectively, showing an installation state of the structure of the invention according to the first claim, and III is an elevation view showing a deformed state of the structure, and FIG. I is a partially enlarged view of FIG. 1-I, II is an axial sectional view thereof, FIG. 3 is an elevational view showing another embodiment, and FIG. 4 is an embodiment of the invention described in claim 2. Fig. 5-I, II are bottom views and sectional views showing gripping members, respectively, and Figs. 6-I, II are bottom views, sectional views, respectively, showing other gripping members. 7-I and II are perspective views showing the elasto-plastic damper. S ... Structural member, 1 ... Elasto-plastic damper, 1a ... Damper part, 1b ... Support part, 2 ... Overhang member, 3 ... Gripping member,
3a …… Restraint piece.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Eiji Fukuzawa 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Within Kashima Construction Co., Ltd. (72) Inventor Mitsuo Sakamoto 1-2-7 Moto-Akasaka, Minato-ku, Tokyo No. Kashima Construction Co., Ltd. (72) Inventor Shunichi Yamada 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Taiji Kurokawa 1-2-7 Moto-Akasaka, Minato-ku, Tokyo No. within Kashima Construction Co., Ltd. (56) References: Showa 63-81157 (JP, U) Showahei 2-128836 (JP, U)

Claims (2)

[Claims] Claim: What is claimed is: 1. An elasto-plastic damper having a rotator-shaped elasto-plastic damper laid between structural members or non-structural members, which are separated from each other at a distance. , One end is fixed to one side of the above-mentioned member, the other end is connected to the other side so as to be relatively movable in the axial direction and in the horizontal direction perpendicular thereto, and only the relative movement in the vertical direction is restricted. An elasto-plastic damper mounting structure characterized in that 2. A mounting structure in which a rotating body-shaped elasto-plastic damper is laid across between structural members or non-structural members that are separated at a distance, and both of them are horizontally projected. An elasto-plastic damper is vertically installed on the shaft between the overhanging members, one end is fixed to one side of the overhanging member, and the other end is connected to the other side so as to be relatively movable in one direction within a horizontal plane. An elasto-plastic damper mounting structure characterized in that only relative movement in one horizontal direction perpendicular to the direction is constrained.