CN205242248U

CN205242248U - Shape memory alloy cable shock mount

Info

Publication number: CN205242248U
Application number: CN201520940587.4U
Authority: CN
Inventors: 田圣泽; 李涵; 杨浩林; 党新志; 袁万城
Original assignee: Tongji University
Current assignee: Tongji University
Priority date: 2015-11-24
Filing date: 2015-11-24
Publication date: 2016-05-18
Anticipated expiration: 2025-11-24

Abstract

The utility model relates to a shape memory alloy (SMA) cable shock mount. The device includes on the support hypoplastron, traditional support component, shape memory alloy cable and is used for installing the backplate of cable. Such support leads to the super -elasticity of shape memory alloy cable, has improved traditional restoring force and the displacement model that stagnates back, has increased the power consumption ability that stagnates back of support, and the limit deformation of support has effectively been guaranteed in the existence of while shape memory alloy cable, can prevent effectively that the support is unsceptered and fall the emergence of roof beam calamity. Moreover, connecting the shape memory alloy cable through the backplate, having realized the removable of cable and easy replaceability, shape memory alloy's shape memory function can realize support reseing fast after shaking under the uniform temperature, has greatly made things convenient for the maintenance of shaking the axle casing.

Description

SMA Tendons shock mount

Technical field

The utility model belongs to civil engineering, earthquake engineering technical field, is specifically related to a kind of SMA Tendons shock mount.

Background technology

The demand of economic development and constantly prosperity are constantly promoting bridge construction. As the bridge of national basis facility important component part, it is the even important leverage of social stability that has a good transport and communication network. Over nearly 20 years, in global range, macroseism takes place frequently, and Wenchuan earthquake and Yushu earthquake have caused huge loss to China especially. This more allows science of bridge building worker recognize the importance of bridge earthquake resistance. Therefore increasing device is devised and is applied to bridge earthquake resistance field. Traditional Bridge Seismic element is divided into passive type, semi-active type and active conventionally. Passive type element comprises rubber support, friction-type bearing, friction pendulum support etc., these bearings are mainly delivered to the earthquake motion of superstructure by weakening to a certain extent bridge substructure, increase the vibration period of bridge structure self, reduce the resonance of bridge structure and earthquake motion, realized by limited friction energy-dissipating the object that reduces bridge structure seismic response simultaneously. Semi-active type and actively can solve to a certain extent the excessive problem of seismic force, but it need to and cost dearly by external energy guarantee work.

There is a drawback in all these bearing original papers, the extreme displacement of bearing can not effectively be ensured without exception. Inhaul cable damping support saddle is creatively applied to the drag-line of coupling beam constraint on bearing, has solved the problem of bearing extreme displacement, has greatly reduced unsceptered destruction and the beam that falls of bearing in Modular Bridge System and has destroyed. But an important problem is, because the elastic elongation of elastic wire rope is relatively limited, in the time that macroseism occurs, the instantaneous small deformation of drag-line extends to whole bridge structure and has produced very large internal force, and this phenomenon is similar to the impact wreckage of shear key and the block of bridge. Therefore the substructure of bridge can bear larger seismic force.

Use for reference the achievement in research in stopping means field both at home and abroad, the steel wire rope drag-line of original drag-line bearing is replaced by marmem (SMA) drag-line with super-elasticity high damping characteristic. The bearing of this improvement not only has the characteristic under original bearing normal operating condition, by super-elasticity and the high damping characteristic of marmem, under macroseism, SMA inhaul cable damping support saddle is avoided the response sudden change that steel wire rope drag-line small strain causes to a certain extent, and can utilize the characteristic of the SMA seismic energy that further dissipates. Meanwhile, by the assigned temperature reversibility of marmem, facilitated the rear maintenance of bridge structure shake to reset.

Summary of the invention

The purpose of this utility model is to propose a kind of SMA Tendons shock mount, by adopting the scheme of softening bearing ultimate deformation process, when making bearing possess control limit deformability, possess the ability at bearing Free Transform stage dissipation seismic energy, further balance structure Earthquake Internal Force response and girder displacement response.

For reaching above object, the solution that the utility model adopts is: for the bearing that contains bearing upper and lower plates, set up on its basis SMA Tendons; For the bearing that does not contain bearing upper and lower plates, as rubber support, set up bearing upper and lower plates, and SMA Tendons is installed.

Accordingly, the SMA Tendons shock mount the utility model proposes, comprise bearing upper plate, bearing lower plate, SMA Tendons, detachable backplate and traditional bearing element, wherein: between bearing upper plate and bearing lower plate, connect by placing traditional bearing element, on bearing upper plate, have the first groove, in bearing lower plate, have accordingly the second groove, SMA Tendons one end is stretched in the first groove of bearing upper plate, the other end stretches in the second groove of bearing lower plate, SMA Tendons is individually fixed in the first groove of bearing upper plate and the second groove of bearing lower plate by detachable backplate, detachable backplate is fixed in bearing upper plate or bearing lower plate by backplate anchor bolt.

In the utility model, in bearing upper plate or bearing lower plate, be equipped with support plate anchor bolt.

In the utility model, described traditional bearing element be in rubber support, ball bridle iron or friction pendulum support etc. any, can specifically adjust according to structure real needs.

In the utility model, the parameter of SMA Tendons (diameter, length, quantity etc.) should be according to displacement demand and the concrete seismic response Rational choice of structure.

The difference of the utility model and traditional inhaul cable damping support saddle has 2 points, the one, the drag-line of traditional inhaul cable damping support saddle is replaced with to SMA Tendons, the 2nd, bearing element wider, not only comprise original friction-type bearing element structure, also can contain original bearings that do not possess bearing upper and lower plates such as rubber-like bearing.

The advantage of the technical scheme that the utility model provides:

1) adopt the inhaul cable damping support saddle of SMA Tendons to possess the ability of controlling bearing extreme displacement, can effectively avoid the generation of the unsceptered of bearing and the beam disaster that falls.

2) SMA Tendons possesses the material behavior of super-elasticity and high damping, and restoring force is being provided, the further seismic energy of dissipative structure when realizing the further strain of bearing. The sudden change of the structural response of the drag-line bearing of on the other hand, having optimized original employing steel wire rope in the time that drag-line works.

3) marmem possesses the ability of recovering original shape under uniform temperature, and the reset that this is conducive to after structure shake is the effective means that structure resets.

4) SMA Tendons shock mount, in possessing traditional passive type damper element function, further dissipative structure energy, the ultimate deformation of control bearing. Compared to half active and active antidetonation element, it has more succinct mechanics principle and high performance-price ratio.

The utility model is not only applicable to the simple bridge in Middle Or Small Span footpath, and for the large bridge that has displacement control requirement, especially long connection multispan and Loads of Long-span Bridges, have more outstanding performance.

Brief description of the drawings

　Fig. 1 is SMA Tendons shock mount front view.

Fig. 2 is SMA Tendons shock mount side view.

Number in the figure: 1 bearing upper plate, 2 bearing lower plates, 3 marmems (SMA) drag-line, 4 support plate anchor bolts, 5 detachable backplates, 6 traditional bearing elements (this figure shows as an example of ball bridle iron example), 7 backplate anchor bolts.

Detailed description of the invention

For the auditor that the makes Patent Office especially public can be expressly understood technical spirit of the present utility model and beneficial effect more, applicant elaborates the mode with embodiment below by reference to the accompanying drawings, but be not all the restriction to the utility model scheme to the description of embodiment, any done according to the utility model design only for pro forma but not substantial equivalent transformation all should be considered as category of the present utility model.

Embodiment 1: ask for an interview Fig. 1 and Fig. 2, described bearing is by bearing upper plate 1, bearing lower plate 2, SMA Tendons 3, detachable backplate 5, tradition bearing element 6 and backplate anchor bolt 7 form, wherein: between bearing upper plate 1 and bearing lower plate 2, connect by traditional bearing element 6, on bearing upper plate 1, have the first groove, in bearing lower plate 2, have the second groove, SMA Tendons 3 one end are stretched in the first groove of bearing upper plate 1, the other end stretches in the second groove of bearing lower plate 2, SMA Tendons 3 is individually fixed in the first groove of bearing upper plate 1 and the second groove of bearing lower plate 2 by detachable backplate 5, detachable backplate 5 is fixed in bearing upper plate 1 or bearing lower plate 2 by backplate anchor bolt 7. SMA Tendons shock mount is installed to SMA Tendons 3 on traditional bearing element by detachable backplate 5, at SMA drag-line during in free relaxed state, bearing function is identical with traditional bearing, when bearing is out of shape when excessive, SMA Tendons intervention work, provide bearing to be further out of shape by its super-elasticity, simultaneously the high damping characteristic of drag-line makes SMA drag-line a part of seismic energy that dissipates in deformation process. and because it possesses shape memory function, it is very convenient after shake keeps in repair reset.

As the one conversion of the utility model embodiment, ball shaped steel bearing can be traditional bearing element of other types equally.

As another conversion of the utility model embodiment, the parameters such as the size of bearing and the size of drag-line all can be carried out design modifying as required.

Above-mentioned is not all the restriction to the utility model scheme to the description of embodiment; therefore; protection domain of the present utility model is not only confined to above-described embodiment; any done according to the utility model design only for pro forma but not substantial various amendment and improvement all need to take the circumstances into consideration to audit.

Claims

1. a SMA Tendons shock mount, comprise bearing upper plate, bearing lower plate, SMA Tendons, detachable backplate and traditional bearing element, it is characterized in that: between bearing upper plate and bearing lower plate, connect by placing traditional bearing element, on bearing upper plate, have the first groove, in bearing lower plate, have accordingly the second groove, SMA Tendons one end is stretched in the first groove of bearing upper plate, the other end stretches in the second groove of bearing lower plate, SMA Tendons is fixed in the first groove of bearing upper plate and the second groove of bearing lower plate by detachable backplate, detachable backplate is fixed in bearing upper plate or bearing lower plate by backplate anchor bolt.

2. SMA Tendons shock mount according to claim 1, is characterized in that being equipped with support plate anchor bolt in bearing upper plate or bearing lower plate.

3. SMA Tendons shock mount according to claim 1, it is characterized in that described traditional bearing element be in rubber support, ball bridle iron or friction pendulum support any, specifically adjust according to structure real needs.

4. SMA Tendons shock mount according to claim 1, is characterized in that diameter, length, the quantity of SMA Tendons should be according to displacement demand and the concrete seismic response Rational choice of structure.