JPH1018636A - Trussed structural body joint construction by oil damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to correspond with horizontal vibration in every direction and to facilitate the maintenance by providing a plurality of pairs of trussed oil dampers making up a pair with two dampers absorbing horizontal vibration between structural bodies of structures at a specific interval in the horizontal direction to connect both structural bodies. SOLUTION: A plurality of pairs of trussed oil dampers 3 making up a pair with two dampers are provided between two structures A and B, and both structural bodies A and B are connected to each other. The oil damper 3 is easily maintained, and large damping force can be displayed with small diameter even if stroke required by amount of deformation is large. When damping efficiency is required to adjust in every direction of a main shaft in the structure, the structure and the main shaft of the oil damper 3 are inclined at 45 degrees, and when oil dampers 3 making up a pair with two units are formed at a right angle to each other, damper function and seismic function can be supplemented with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure of a structure in which an oil damper for absorbing vibration energy is installed at an expansion joint portion of the structure.

[0002]

2. Description of the Related Art Expansion joints are provided between long structures or structures having different natural periods for the purpose of avoiding collision due to vibration of a separated structure against an earthquake. This is to divide the structure into appropriate units to generate vibrations for each unit and to prevent obstacles such as cracks in the structure when it behaves as a whole. I was

On the other hand, in Japanese Patent Publication No. Hei 2-232478, a damper for absorbing horizontal vibration is straddled between the structures separated by an expansion joint, and the two structures are connected by a damper. It has been proposed that the vibration energy of each of the divided structures is absorbed by the joint portion to add a damping function to the joint at an early stage. (Hereinafter referred to as a joint damper.) The damper is directly connected to the structure or interposed between beams that are protruded horizontally and cantilevered from the structure. It is a structure to be installed.

[0004] FIG. 5 (a) is a diagram of a drum type steel damper D ₁ which is straddled between the two structures S cantilever projecting from the S 101, 101, (b) Bell Shaped steel damper D ₂
FIG.

However, in general, the joint damper needs to follow a larger deformation amount than the interlayer damper. The joint damper of Japanese Patent Publication No. Hei 2-232478 described above has a drawback in that when the amount of deformation is large, the height of the damper is increased and space is required.

The present invention has been made to solve such a problem.

[0007]

Means for Solving the Problems Two oil dampers for absorbing vibration in the horizontal direction are provided as a pair in a truss shape between structures of structures separated from each other at a horizontal distance by an expansion joint. A truss-type structure connecting structure using an oil damper is characterized in that a plurality of sets are straddled and both structures are connected by the oil damper.

In the joint damper of the present invention, an oil damper which is easy to maintain is installed in place of an elasto-plastic type joint damper so that a pair of two oil dampers can be installed at an angle so as to cope with horizontal vibration in all directions. It was done.

FIG. 3 is a view for coping with a case where it is necessary to adjust the damping performance (damping coefficient and damping force) for each main shaft direction of the structure by changing the installation angle of the oil damper. The damping coefficient and damping force are both large, and the angle between the two oil dampers that make up one set is 90 ° or more,
(B) is a diagram in which the angle between the two oil dampers is 90 ° or less when the angle is large in the X direction.

FIG. 4 (a) shows a pair of two oil dampers 90
°, the function of the oil damper and the columns, beams,
It is the figure which showed that the functions of the earthquake-resistant elements, such as a wall, complement each other. (It is needless to say that the two oil dampers do not necessarily form 90 °.) When the angle between the main shaft of the structure and the pair of oil dampers is 45 °, the main shaft direction of the structure is used. in the input columns, beams, shear element such as a wall is (will function half because one direction of the entire seismic function) only in one direction acts, the oil damper according to the angle 1/2 1 ^{/ 2} works. When the input direction is at 45 ° to the main axis direction of the structure, almost half of the oil damper functions, but the seismic elements such as columns, beams or walls are ^{1/2 1/2 of the} total seismic elements. Will work. In this way, by tilting the main axis of the structure and the oil damper by 45 ° (that is, by installing a pair of oil dampers so as to form a 90 ° angle), the damper function and the seismic function can be mutually complemented. it can. (B) is a diagram showing these states in a table.

In addition, the stroke of the oil damper can be freely designed, and the change in the outer shape due to the stroke increases only in length. The outer diameter is determined by the magnitude of the damping force, for example, 100t
With a damping force of 34 cm, the diameter is 34 cm, so that a damper that requires a large stroke can be stored under the ceiling.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1A is a side view of a truss-type joint damper of an oil damper according to the present invention, and FIG. 1B is a plan view. 1 is a column of the structures A and B, and 2 is a beam of each structure. Reference numeral 3 denotes an oil damper composed of one set of two units, and in this case, two sets are installed.

FIG. 2 is a diagram showing that even if the required stroke is large, the oil damper can be accommodated behind the ceiling because the diameter is 34 cm with a damping force of, for example, 100 t. 4 is a slab and 5 is an expand joint.

[0015]

The effects of the present invention are as follows.

In the case of the conventional joint damper, when the deformation amount is large, the height of the damper is increased, the space is taken up, and once the damper has been plastically deformed, there is a problem in that maintenance such as replacement is required. According to the present invention, even if the stroke required by the deformation amount is large, the diameter is 34 cm with a damping force of, for example, 100 t, so that the oil damper can be accommodated even above the ceiling, and maintenance is easy because the oil damper is used.

When it is necessary to adjust the damping performance (damping coefficient and damping force) for each main shaft direction of the structure, the installation angle of the oil damper can be changed. Damping coefficient in the Y direction,
When both damping forces are to be increased, the angle between the two oil dampers constituting one set is 90 ° or more, and when it is desired to increase in the X direction, the angle between the two oil dampers is 90 ° or less.

By doing so, the damper function and the pillar,
The seismic function of the beam frame can be mutually complemented.

[Brief description of the drawings]

FIG. 1A is a side view of a truss-type joint damper of an oil damper of the present invention, and FIG. 1B is a plan view.

FIG. 2: Even if the required stroke is large, for example, 10
FIG. 9 is a view showing that an oil damper can be accommodated behind a ceiling because the diameter is 34 cm with a damping force of 0t.

FIGS. 3A and 3B are diagrams illustrating a case where it is necessary to adjust damping performance (a damping coefficient and a damping force) for each main axis direction of a structure by changing an installation angle of an oil damper. FIG. Both the coefficient and the damping force are large, and the angle between the two oil dampers forming one set is 90 ° or more. (B) The angle between the two oil dampers when the angle is large in the X direction is 90 ° or less. FIG.

FIG. 4 is a diagram showing that the function of the oil damper and the function of the seismic elements such as columns, beams, and walls of the structure complement each other by setting a pair of oil dampers at 90 °.

5 (a) is a drum-shaped steel damper D straddled between cantilevers 101, 101 projecting from two structures S, S. FIG.
Are diagrams _1, (b) is a diagram Berudanpa D _2.

[Explanation of symbols]

1 ... pillar, 2 ... beam, 3 ... oil damper, 4 ...
..Slabs, 5 ... expansion joints, 6
... Ceiling A ... Building A, B ... Building B, D ₁ ... drum-shaped steel damper, D ₂ ... bell-shaped steel damper, S ... structure 101 ... Cantilever projecting from S

Claims (3)

[Claims] An oil damper for absorbing horizontal vibration is provided between two structures separated from each other at a horizontal distance by an expansion joint.
A truss-type structure connection structure using an oil damper, wherein a plurality of sets are provided in a truss-type as a set, and both structures are connected by the oil damper. 2. A truss by an oil damper according to claim 1, wherein the installation angle of the oil damper is changed for each main shaft direction of the structure to adjust the damping performance of the structure for each main shaft direction. Type structure connection structure. 3. The structure is characterized in that the main shafts of the structure and the oil damper are inclined at 45 °, and two sets of oil dampers are installed so as to form a 90 ° angle, so that the damper function and the seismic function can be mutually complemented. A truss-type structure connection structure using the oil damper according to claim 1.