CN210684447U

CN210684447U - U-shaped SMA rib shock-absorbing support

Info

Publication number: CN210684447U
Application number: CN201921371696.3U
Authority: CN
Inventors: 曹飒飒; 纪泓言
Original assignee: Guangzhou University
Current assignee: Guangzhou University
Priority date: 2019-08-22
Filing date: 2019-08-22
Publication date: 2020-06-05
Anticipated expiration: 2029-08-22

Abstract

The utility model relates to a U-shaped SMA rib damping support, which comprises a support, an upper seat plate positioned above the support, a lower seat plate positioned below the support and U-shaped SMA ribs with shape memory capability, wherein the upper seat plate and the lower seat plate are both connected with the support; u-shaped SMA rib sets up around the support symmetry, and the vertical setting of U-shaped SMA rib, the both ends of U-shaped SMA rib are fixed connection respectively at the downside of last bedplate, the last side of bedplate down. Relates to an earthquake fortification technology in the field of civil structural engineering; the seismic energy-saving device has good limiting capacity and energy-consuming capacity in an earthquake, and has good self-resetting capacity after the earthquake; and the seismic isolation and reduction effect is good.

Description

U-shaped SMA rib shock-absorbing support

Technical Field

The utility model belongs to civil structure engineering field relates to the technique of fortifying oneself with a defence of combatting earthquake, especially relates to a U-shaped SMA rib shock absorber support.

Background

The strong earthquake which occurs in the world in recent decades makes people realize that the traditional damping device often generates overlarge horizontal displacement under the action of the earthquake, and in a beam bridge, the problem of beam falling cannot be effectively prevented by using structural measures such as a shock insulation stop block and the like for limiting the overlarge displacement of a beam body. In the prior art, in order to improve the limiting capacity of a bridge, an X-shaped steel stop block is provided in Li-Jian and the like; developing a series of bracing cable seismic isolation and reduction supporting seats in Yuan Wancheng and the like; pengtian waves and the like provide a three-level fortification bridge seismic design method, and a multi-defense line seismic spherical steel support is developed. However, although the existing novel seismic isolation and reduction systems have certain limiting capacity, residual deformation is easy to generate after the earthquake, and the structural repair is not facilitated.

SUMMERY OF THE UTILITY MODEL

To the technical problem who exists among the prior art, the utility model aims at: the U-shaped SMA rib shock absorption support is mainly used for bridge shock absorption and has good limiting capacity, energy consumption capacity and self-resetting capacity after earthquake.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a U-shaped SMA rib shock-absorbing support comprises a support, an upper seat plate and a lower seat plate, wherein the upper seat plate is positioned above the support, the lower seat plate is positioned below the support, and the upper seat plate and the lower seat plate are both connected with the support; comprises a U-shaped SMA rib with shape memory; the U-shaped SMA ribs are mainly made of SMA (shape memory alloy) with a shape memory function; u-shaped SMA rib sets up around the support symmetry, and the vertical setting of U-shaped SMA rib, the both ends of U-shaped SMA rib are fixed connection respectively at the downside of last bedplate, the last side of bedplate down. After the structure is adopted, the U-shaped SMA ribs have superelasticity, can meet the requirement of huge horizontal displacement of the shock absorption support under the action of an earthquake, basically do not generate plastic damage, reduce the difficulty of repairing after the earthquake and effectively reduce the maximum horizontal displacement of the shock absorption support; the U-shaped SMA ribs endow the damping support with self-recovery capability and enhance the energy consumption capability under the action of an earthquake.

Preferably, the U-shaped SMA ribs include two pairs of diagonally positioned U-shaped SMA ribs, and the openings of the U-shaped SMA ribs are both directed toward the center of the support base. After the structure is adopted, the U-shaped SMA ribs can better reduce the horizontal displacement of the shock absorption support under the earthquake and can be repaired after the earthquake.

Preferably, the U-shaped SMA ribs comprise two pairs of U-shaped SMA ribs which are positioned at diagonal positions, two U-shaped SMA ribs which are positioned in the middle parts of the front side and the rear side and are oppositely arranged, and two U-shaped SMA ribs which are positioned in the middle parts of the left side and the right side and are oppositely arranged; the openings of the U-shaped SMA ribs are all towards the center of the support. After the structure is adopted, the U-shaped SMA ribs can better reduce the horizontal displacement of the shock absorption support under the earthquake and can be repaired after the earthquake.

Preferably, the U-shaped SMA ribs comprise two pairs of U-shaped SMA ribs which are positioned at the front side and the rear side and oppositely arranged, and two pairs of U-shaped SMA ribs which are positioned at the left side and the right side and oppositely arranged; the U-shaped SMA rib opens just opposite the side on which it is located. After the structure is adopted, the U-shaped SMA ribs can better reduce the horizontal displacement of the shock absorption support under the earthquake and can be repaired after the earthquake.

Preferably, the upper seat plate and the lower seat plate are both steel plates, and the support is a lead rubber support. Typically, the holder is a rectangular lead rubber holder or a circular lead rubber holder.

Preferably, the two ends of the U-shaped SMA rib are fixedly connected with the upper seat plate and the lower seat plate through bolts.

The action principle is as follows: the U-shaped SMA rib shock absorption support is combined with the traditional shock absorption support by using the U-shaped SMA rib with excellent characteristics of superelasticity, fatigue resistance, corrosion resistance and the like as a damper; u-shaped SMA rib provides level self-restoring power for shock-absorbing support, increases traditional shock-absorbing support from restoring to the throne ability and damping performance, mainly used bridge shock attenuation, also can popularize and be used for other building structures etc..

Overall, the beneficial effects achieved are: the U-shaped SMA ribs have the shape memory capacity, so that the shock absorption support can recover the deformation of the shock absorption support, and the shock absorption support is endowed with the self-recovery capacity after the shock; the U-shaped SMA ribs effectively reduce the maximum displacement generated by the damping support, and the limiting capacity of the damping support is increased, so that the displacement between the pier beams is reduced, and the falling beam earthquake damage is prevented. The hyperelasticity and the shape memory characteristics of the SMA material increase the horizontal rigidity of the shock absorption support, limit the maximum displacement of the shock absorption support and endow the shock absorption support with the resetting capability after the shock absorption support shakes. The U-shaped SMA ribs are simultaneously connected with the upper seat plate and the lower seat plate, so that the resetting capability is provided, and the energy consumption capability under the action of an earthquake is increased.

Drawings

FIG. 1 is a structural schematic diagram of a U-shaped SMA rib shock mount according to a first embodiment.

FIG. 2 is a schematic structural diagram of a U-shaped SMA rib shock mount according to a second embodiment.

FIG. 3 is a structural schematic diagram of a shock mount with U-shaped SMA ribs according to a third embodiment.

Fig. 4 is a structural schematic diagram of a U-shaped SMA rib.

Shown in the figure:

1-upper seat plate, 2-support, 3-lower seat plate, 4-U-shaped SMA rib and 5-bolt.

Detailed Description

The present invention will be described in further detail with reference to specific embodiments.

A U-shaped SMA rib shock-absorbing support comprises a support, an upper seat plate and U-shaped SMA ribs, wherein the upper seat plate is positioned above the support; the lower seat plate is positioned below the support, and the upper seat plate and the lower seat plate are connected with the support; wherein, the upper seat plate and the lower seat plate are both steel plates, and the support is a lead rubber support (a round lead rubber support or a rectangular lead rubber support).

The U-shaped SMA ribs are made of SMA (shape memory alloy) with shape memory function,

u-shaped SMA rib sets up around the support symmetry, the vertical setting of U-shaped SMA rib, the both ends difference fixed connection of U-shaped SMA rib is at the downside of last bedplate, the side of going up of bedplate down: the two ends of the U-shaped SMA rib are fixedly connected with the upper seat plate and the lower seat plate through bolts.

On the basis of the lead core rubber support, a plurality of U-shaped SMA ribs are used for simultaneously connecting the upper base plate and the lower base plate to provide restoring force and increase energy consumption capacity under the action of an earthquake. In practical application, the U-shaped SMA ribs with reasonable sizes are selected according to conditions so as to achieve the best seismic isolation and reduction effect and the best limiting effect.

The utility model discloses utilize the hyperelasticity and the shape memory characteristic of SMA material, increase the horizontal rigidity of shock mount, when the biggest displacement of restriction shock mount, also given the reset capability after the shock mount shakes. The U-shaped SMA ribs have superelasticity, can meet the requirement of huge horizontal displacement of the shock absorption support under the action of an earthquake, basically does not generate plastic damage, and reduces the difficulty of repairing after the earthquake.

The horizontal rigidity, the energy consumption capability and the self-resetting capability of the U-shaped SMA rib damping support can be adjusted through the size and the arrangement number of the U-shaped SMA ribs. According to the number and the arrangement form of the U-shaped SMA ribs and the type of the common lead core rubber support (a round lead core rubber support and a rectangular lead core rubber support), the following preferred forms can be adopted.

Example one

The U-shaped SMA ribs comprise two pairs of U-shaped SMA ribs which are positioned at the opposite corners, and the openings of the U-shaped SMA ribs face the center of the support. The support is a rectangular lead core rubber support.

Example two

The U-shaped SMA ribs comprise two pairs of U-shaped SMA ribs which are positioned at opposite angles, two U-shaped SMA ribs which are positioned in the middle parts of the front side and the rear side and are oppositely arranged, and two U-shaped SMA ribs which are positioned in the middle parts of the left side and the right side and are oppositely arranged; the openings of the U-shaped SMA ribs are all towards the center of the support. The support is a round lead core rubber support.

EXAMPLE III

The U-shaped SMA ribs comprise two pairs of U-shaped SMA ribs which are positioned at the front side and the rear side and are oppositely arranged, and two pairs of U-shaped SMA ribs which are positioned at the left side and the right side and are oppositely arranged; the U-shaped SMA rib opens just opposite the side on which it is located. The support is a rectangular lead core rubber support.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.

Claims

1. A U-shaped SMA rib shock-absorbing support comprises a support, an upper seat plate and a lower seat plate, wherein the upper seat plate is positioned above the support, the lower seat plate is positioned below the support, and the upper seat plate and the lower seat plate are both connected with the support; the method is characterized in that: the device also comprises a U-shaped SMA rib with shape memory capacity; u-shaped SMA rib sets up around the support symmetry, and the vertical setting of U-shaped SMA rib, the both ends of U-shaped SMA rib are fixed connection respectively at the downside of last bedplate, the last side of bedplate down.

2. A U-shaped SMA rib shock mount according to claim 1 wherein: the U-shaped SMA ribs comprise two pairs of U-shaped SMA ribs which are positioned at the opposite corners, and the openings of the U-shaped SMA ribs face the center of the support.

3. A U-shaped SMA rib shock mount according to claim 1 wherein: the U-shaped SMA ribs comprise two pairs of U-shaped SMA ribs which are positioned at opposite angles, two U-shaped SMA ribs which are positioned in the middle parts of the front side and the rear side and are oppositely arranged, and two U-shaped SMA ribs which are positioned in the middle parts of the left side and the right side and are oppositely arranged; the openings of the U-shaped SMA ribs are all towards the center of the support.

4. A U-shaped SMA rib shock mount according to claim 1 wherein: the U-shaped SMA ribs comprise two pairs of U-shaped SMA ribs which are positioned at the front side and the rear side and are oppositely arranged, and two pairs of U-shaped SMA ribs which are positioned at the left side and the right side and are oppositely arranged; the U-shaped SMA rib opens just opposite the side on which it is located.

5. A U-shaped SMA rib cushion bracket, according to claim 2 or 4, wherein: the support is a rectangular lead core rubber support.

6. A U-shaped SMA rib shock mount according to claim 3 wherein: the support is a round lead core rubber support.

7. A U-shaped SMA rib shock mount according to claim 1 wherein: the upper seat plate and the lower seat plate are both steel plates, and the support is a lead core rubber support.

8. A U-shaped SMA rib shock mount according to claim 1 wherein: the two ends of the U-shaped SMA rib are fixedly connected with the upper seat plate and the lower seat plate through bolts.