WO1998026142A1

WO1998026142A1 - Vibration-control damper

Info

Publication number: WO1998026142A1
Application number: PCT/JP1997/004518
Authority: WO
Inventors: Yutaka Fukuda
Original assignee: Yutaka Fukuda
Priority date: 1996-12-09
Filing date: 1997-12-09
Publication date: 1998-06-18
Also published as: JPH10169245A

Abstract

A vibration-control damper which is simple in construction and inexpensive and which serves to control a wide range of vibrations of a building, including small and large vibrations due to wind, earthquake and the like. The vibration-control damper comprises a vibration absorption member (11) having an inside plate (11a) and an outside plate (11b), on which a vibration absorption rubber (11c) formed of a highly damping rubber stacks in a sandwiched manner, and a low yield strength member (12) formed of a dead soft steel having a lower yielding point than that of building structural steel members such as columns (2), beams (3) and braces (5), the vibration absorption member (11) and low yield strength member (12) being formed at contact surfaces thereof with through holes (a) of the same diameter. A mount portion at a lower end of a hanging column (4) is formed with a through hole (a') of a smaller diameter than that of the through holes (a) so that the respective through holes (a) and through hole (a') are aligned coaxially to permit a pin (b) of the same diameter as that of the through hole (a') to pass therethrough, the pin (b) being provided with a fall-off preventive member (c).

Description

Specification

Technical field of damping damper

The present invention relates to an elasto-plastic hysteretic vibration damper that is incorporated between a wall and a beam of a building structure to absorb vibration energy and exhibit a vibration damping effect. Background art

Today's vibration dampers that absorb vibration energy during earthquakes and strong winds include steel dampers, lead dampers, and viscous dampers, each of which has advantages and disadvantages.

The steel damper deforms in proportion to the force in the elastic region, and when it exceeds the yield point and enters the plastic region, the degree of deformation with the increase in force increases rapidly, and the steel material yields before it breaks. Deformation that exceeds several times the point is reached.

For this reason, it has a large damping performance and is relatively inexpensive, but has no attenuation before yield deformation, and has little damping effect against wind and small and medium-sized earthquakes.

In addition, residual deformation may remain after a large earthquake, requiring replacement.

Lead dampers exhibit a restoring force characteristic close to that of steel dampers, and lead has the property of recovering particle bonding at room temperature even after plasticization.Therefore, lead must be replaced unless severe damage is caused even after a large earthquake. It is said that it is not, but it is very expensive.

The viscous damper obtains damping force by using the resistance force caused by the friction of oil and other fluids.Since it has no rigidity, the damping force acts even on small vibrations, and it is effective against wind and small and medium-sized earthquakes. Even if a vibration damping effect can be obtained, maintenance of the fluid is required, making it relatively expensive.

Accordingly, the present invention is to provide an inexpensive vibration damper with a simple structure that suppresses a wide range of vibrations of a building structure from a small vibration to a large vibration due to a wind or an earthquake. It was made for the purpose. Disclosure of the invention

The configuration of the present invention is as follows.

Columns, beams, braces, and other low-yield power-resistant members with a lower yield point than steel for building structures.They are laid across the gap between connecting members such as braces that connect beams on the upper and lower floors. External force transmitting means for transmitting an external force to the low yield strength resistant member when an external force applied to the mounting portion exceeds a certain magnitude; and an external force applied to the low yield strength resistant member. And an external force guiding means for guiding in a direction parallel to the vibration damper. BRIEF DESCRIPTION OF THE FIGURES

Fig. 1 is an overall view of a building structure equipped with a damping damper. FIG. 2 is an exploded perspective view of the vibration damper. FIG. 3 is a front view of the vibration damper. Fig. 4 is a side view of the vibration damper. FIG. 5 is an exploded perspective view of a guide member of the vibration damper. FIG. 6 is a plan view of a guide member of the vibration damper. FIG. 7 is a side view of a guide member of the vibration damper. FIG. 8 to FIG. 12 are diagrams showing mounting positions of the vibration damper. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an overall view of a building structure to which the vibration damper of the present invention is attached. The damping damper 1 is attached by connecting the hanging pillar 4, the brace 5, and the base plate 6 in the plane surrounded by the pillar 2 and the beam 3.

In the building structure, pillars 2 are erected vertically at predetermined intervals, and beams 3 connecting these pillars 2 are erected horizontally. The pillar 2, the beam 3, the hanging pillar 4, and the brace 5 are formed of steel for building structure such as H-section steel, and are joined to each other by bolts or the like.

The upper end A of the hanging pillar 4 is connected to the beam 3 on the upper floor, and the lower end B is connected to one end of the brace 5.

The other end C of the brace 5 is connected to the beam 3 on the upper floor.

The base plate 6 is erected near the intersection D between the extension of the hanging column 4 and the beam 3 on the lower floor.As described above, the hanging column 4, the brace 5, and the base plate 6 are assembled, and the damping damper 1 is Between the gaps.

FIG. 2 shows an exploded perspective view of the vibration damper 1 of the present invention.

Since the damping damper 1 has a shape in which both surfaces of the hanging pillar 4 and the base plate 6 are sandwiched by symmetric steel plate members, only one surface will be described.

The vibration damper 1 is composed of an inner plate 11a and an outer plate 11b, with a vibration-absorbing rubber member 11 that is formed by sandwiching a vibration-absorbing rubber 11c formed of high-attenuating rubber in a sandwich shape. And low-yield power-resistant members 12 made of extremely mild steel having a lower yield point than steel materials for building structures such as braces 5.

The inner plate 11a, the outer plate 11b, and the vibration-absorbing rubber 11c are bonded to each other one by one using a rubber-specific bonding method (such as vulcanization bonding). Form one.

The vibration-absorbing rubber 11c may be poured between the inner plate 11a and the outer plate 11b to form an integral vibration-absorbing rubber member 11 as a whole.

Also, the outer plate 11b may be omitted, and the vibration-absorbing rubber 11c may be directly mounted between the inner plate 11a and the upper plate 12a of the low-yield force-resistant member 12.

Alternatively, both the inner plate 11a and the outer plate 11b may be omitted, and the vibration-absorbing rubber 11c may be directly bonded between the low-yield power-resistant member 12 and the hanging column 4 or the base plate 6. . On the connection surface between the vibration-absorbing rubber member 11 and the low-yield resistance member 12, a through hole a having the same diameter is formed.

In addition, a through hole a ′ having a smaller diameter than the through hole a is formed in the mounting portion at the lower end of the hanging pillar 4. Then, the through holes a and the through holes a 'are arranged coaxially, and a pin b having the same diameter as the through hole a' is stopped and c is provided and inserted.

As a result, the pin b is tightly attached to the mounting portion at the lower end of the hanging column 4, and the vibration-absorbing rubber member 11 and the low-yield power-resistant member 12 are loosely engaged, and when the external force exceeds a certain size, the pin b becomes low. It serves as an external force transmitting means for transmitting external force to the yield resistant member 12.

FIGS. 3 and 4 show a front view and a side view of the vibration damper 11 attached to the gap between the hanging column 4 and the base plate 6. FIG.

The damping damper 1 is constructed by first bolting the outer plate 1 1b of the vibration-absorbing rubber member 11 and the upper plate 12a of the low-yield anti-moisture member 12 together, and attaching the lower end of the hanging pillar 4. The inner plate 11a of the vibration-absorbing rubber member 11 is connected to the base plate 6 and the lower plate 12b of the low-yield-resistant member 12 is connected to the base plate 6 with high-strength bolts.

Pin b is inserted into through hole a 'of the mounting part at the lower end of the hanging pillar 4, and through hole a passing through the connection surface of the vibration-absorbing rubber member 11 and the low-yield resistance member 12. Set c.

In addition, a spacer 13 for positioning is inserted into the joint between the low yield strength member 12 and the base plate 6, and the high strength bolts are connected.

If the intersection of the hanging column 4 and the brace 5 is deformed out of plane, the damper 11 will be twisted, and its function cannot be fully exhibited.

For this reason, a guide member 14 as an external force guiding means as shown in an exploded perspective view of FIG. 5 is attached to a flange portion at a lower end portion of the hanging column 4, and a groove 14 a of the guide member 14 is attached to the base plate 6. Fits. The guide member 14 guides an external force applied to the building structure in a direction parallel to the beam 3.

As shown in the plan view of Fig. 6 and the side view of Fig. 7, the external force guide means A guide member 14 may be provided which sandwiches the column 4 and the brace 5 from outside and inside of the surface and guides external force applied to the building structure in a direction parallel to the beam 3.

The vibration damper 11 according to the present invention has the above-described configuration, and the column 2 and the beam 3 are deformed in the elastic region and generate vibration energy against small vibration generated by an external force such as a wind or a small earthquake. However, the vibration absorbing rubber 11c of the vibration damper 1 is deformed, so that the vibration that has entered the building structure can be absorbed and the vibration can be suppressed.

When the external force increases, the deformation of the vibration-absorbing rubber 11 c also increases, and the pin b comes into contact with the low-yield-resistant member 12 to directly transmit the external force.

As a result, the low yield strength member 12 undergoes plastic deformation and absorbs vibration energy by hysteresis, so that vibration due to an earthquake can be suppressed earlier. Furthermore, in the case of an earthquake large enough to cause plastic deformation of columns 2 and beams 3, first, the low-yield power-resistant member 12 of the damping damper 1 causes sufficient plastic deformation to absorb vibration energy. Therefore, it is possible to prevent the column 2 and the beam 3 from significantly plasticizing.

Further, even if residual deformation remains or cracks are generated, the vibration damper 1 can be replaced because it is bolted to the hanging column 4 and the base plate 6, and can be easily repaired.

Figs. 8 to 12 show examples of the mounting positions of various vibration dampers 1. Fig. 8 is at the intersection of beam 3 and hanging column 4 and brace 5, Fig. 9 is at the intersection of beam 3 and brace 5, Fig. 10 is at the intersection of place 5 and brace 5, The figure shows an example of attachment at the intersection of the brace 5 and the plate wall 7, and FIG. 12 shows an example of attachment between the beam 3 and the plate wall 7.

The damping dampers 11 shown in the figure may be mounted with their upper and lower positions reversed. Industrial applicability

The vibration damper of the present invention is configured as described above, and has a vibration absorbing rubber member and a low yield resistance member. And loosely insert the pins into the through holes formed in these connection surfaces, and attach guide members on both sides of the connection surface to guide external force in a direction parallel to the beam.

Therefore, according to the present invention, the vibration-absorbing rubber is deformed to absorb the vibration with respect to the small vibration generated by an external force such as a wind or a small earthquake.

When the deformation of the vibration-absorbing rubber increases, a large external force is applied along the beam by the action of the pin and the guide member, and the low-yield resistance member undergoes plastic deformation, and absorbs vibration energy by hysteresis.

For this reason, it is possible to control the vibration of a wide range of building structures from small vibration to large vibration.

In addition, this damper has a relatively simple structure that combines vibration-absorbing rubber and low-yield resistance steel, so it is low-cost, easy to install, easy to replace, and compact. The occupied space can be reduced.

Furthermore, the vibration absorbing rubber adjusts the hysteresis loop by changing the rubber quality, rubber thickness, and rubber area.

The hysteresis loop is adjusted for the low yield strength steel according to the shape, thickness, and number of layers.

Therefore, the rigidity can be easily adjusted, so that the same member can be applied to various buildings and different floors.

Claims

The scope of the claims

1. A low-yield power-resistant member with a lower yield point than steel for building structures such as columns, beams, and braces, which is straddled by the gap between connecting members such as braces that connect beams on the upper and lower floors. An external force transmitting means for transmitting an external force to the low-yield resistance member when the external force applied to the mounting portion is greater than a certain value; An external force guiding means for guiding an external force applied in a direction parallel to the beam.