CN111395568A - Replaceable shape memory alloy composite shock insulation support - Google Patents

Abstract

The invention relates to a replaceable shape memory alloy composite vibration isolation bearing, comprising an upper connecting plate, a lower connecting plate, a laminated rubber bearing and a shape memory alloy stranded wire, namely SMA stranded wire, the upper connecting plate and the lower connecting plate are connected The plates are respectively fixed with the upper and lower surfaces of the laminated rubber support through fixing bolts; the inner sides of the upper connecting plate and the lower connecting plate on the front and rear sides of the laminated rubber support are longitudinally welded with high-strength nuts, and the shape memory alloy strands are passed through in turn. After passing a high-strength nut on the upper connecting plate and the lower connecting plate, it is fixed, so that the shape memory alloy stranded wire forms an "M" shape. The shape memory alloy stranded wire has higher energy dissipation capacity and self-resetting capacity, and can effectively control the residual deformation of the bearing and the structure after the earthquake; compared with the traditional rubber bearing, the tensile capacity is significantly improved, and it can resist large vertical deformation. , and easy to install and disassemble.

Description

A replaceable shape memory alloy composite vibration isolation bearing

technical field

The invention belongs to the technical field of construction and civil engineering, and particularly relates to a replaceable shape memory alloy composite vibration isolation bearing.

Background technique

Earthquake is a natural phenomenon, which can cause severe extrusion, shearing and tensile damage to high-rise buildings and shear wall structures, and it is difficult to repair after the earthquake. Therefore, the bottom and feet of high-rise buildings and shear wall structures will be installed with isolation bearings to reduce the impact of earthquakes. However, the traditional vibration isolation bearings use rubber bearings, which have certain limitations, such as small damping, low energy dissipation capacity, and low tensile strength, and the bearings are prone to instability under large deformation and displacement.

SUMMARY OF THE INVENTION

In view of the deficiencies in the prior art, the present invention provides a replaceable shape memory alloy composite vibration isolation bearing.

A replaceable shape memory alloy composite vibration isolation bearing, comprising an upper connecting plate, a lower connecting plate, a laminated rubber bearing and a shape memory alloy stranded wire, namely SMA stranded wire, the upper connecting plate and the lower connecting plate respectively pass through The fixing bolts are fixed with the upper and lower surfaces of the laminated rubber support; the inner sides of the upper connecting plate and the lower connecting plate on the front and rear sides of the laminated rubber support are longitudinally welded with high-strength nuts, and the shape memory alloy strands pass through the upper connection in sequence A high-strength nut on the plate and the lower connecting plate is then fixed, so that the shape memory alloy stranded wire forms an "M" shape.

The laminated rubber bearing is a shock-isolating rubber bearing wrapped by a rubber protective layer on the outside, and an inner sealing plate, an inner steel plate and an inner rubber layer are arranged in parallel with the upper connecting plate and the lower connecting plate inside, and the inner steel plate and the inner rubber layer are arranged in parallel. Set at intervals, both ends are sealed with inner sealing plate, and the inner sealing plate, inner steel plate and inner rubber are all connected by vulcanization; threaded holes are opened on the inner sealing plate for connection with the upper connecting plate and the lower connecting plate fixed.

The size of the shape memory alloy strand is determined by the shape memory wire according to the force capacity of the building wall components and the actual situation, and is twisted according to the national steel strand twisting standard.

The diameter of the high-strength nut is larger than that of the shape memory alloy stranded wire.

The memory alloy strands of the support are parallel to the outer surface of the building wall.

The beneficial effects of the present invention are:

1. The bearing of the present invention uses a shape memory alloy stranded wire, which can give full play to its superelasticity to consume the energy generated by the earthquake and the larger restoring force. Compared with the traditional rubber bearing, it has higher energy dissipation capacity and self-resetting. It can effectively control the residual deformation of the bearing and the structure after the earthquake; the shape memory alloy stranded wire and the laminated rubber bearing work together to achieve the purpose of composite isolation;

2. The use of shape memory alloy stranded wire makes the bearing more resistant to horizontal deformation, so that the bearing does not produce large deformation during the working stage; and compared with the traditional rubber bearing, the tensile strength is significantly improved, and it can resist Large vertical deformation;

3. In the present invention, shape memory alloy strands with different diameters can be used according to different working conditions, and the installation and disassembly are convenient, which can not only protect the stability and safety of the building structure and the wall, but also improve the building structure and the wall. The utilization rate of the body structure greatly reduces the difficulty of post-earthquake repair;

4. The shape memory alloy strands are symmetrically distributed on the front and rear sides of the laminated rubber bearing, which not only improves the tensile capacity and shear resistance of the bearing, but also eliminates the occurrence of relatively large differences due to the arrangement on the left and right sides of the laminated rubber bearing. When the large horizontal deformation occurs, the contact friction between the shape memory alloy stranded wire and the support is the problem.

5. The replaceable shape memory alloy composite rubber bearing of the present invention greatly improves the utilization rate of building structure, wall structure and bearing.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is the front view of Fig. 1;

Fig. 3 is the side view of Fig. 1;

Fig. 4 is the sectional view of Fig. 2;

in,

1- Upper connecting plate, 2- Lower connecting plate, 3- Inner sealing plate, 4- Connecting bolt holes, 5- Inner steel plate, 6- Inner rubber layer, 7- Shape memory alloy stranded wire, 8- High strength nut, 9- Laminated rubber mounts, 10-holes for fixing bolts.

Detailed ways

In order to better explain the present invention and facilitate understanding, the technical solutions and effects of the present invention will be described in detail below with reference to the accompanying drawings and through specific embodiments.

As shown in Figures 1-4, a replaceable shape memory alloy composite vibration isolation bearing includes an upper connecting plate 1, a lower connecting plate 2, a laminated rubber bearing 9 and a shape memory alloy stranded wire 7, namely SMA stranded wire , the upper connecting plate 1 and the lower connecting plate 2 are provided with fixing bolt holes 10, which are respectively fixed with the upper and lower surfaces of the laminated rubber support 9 through the fixing bolts; the upper connecting plate 1 and the lower connecting plate 2 are connected at the four corners The bolt hole 4 and the non-connecting surface of the laminated rubber support 9 are connected to the building structure wall by bolts. The inner sides of the upper connecting plate 1 and the lower connecting plate 2 on the front and rear sides of the laminated rubber support 9 are longitudinally welded with high-strength nuts 8 for inserting the shape memory alloy strands 7, and the shape memory alloy strands 7 pass through the upper A high-strength nut 8 on the connecting plate 1 and the lower connecting plate 2 is then fixed, so that the shape memory alloy stranded wire 7 forms an "M" shape; when the support is stretched and horizontally deformed, the shape memory alloy stranded wire 7 can be deformed , give full play to the superelasticity and energy dissipation capacity of the shape memory alloy, so as to achieve the effect of shock absorption and earthquake resistance; and the superelasticity of the shape memory alloy stranded wire 7 exerts a huge energy dissipation capacity, and can also provide a support through the huge restoring force generated. Certain self-reset capability. The high-strength nuts 8 are symmetrically distributed on both sides of the laminated rubber support 9 .

The laminated rubber bearing 9 is a shock-isolating rubber bearing 9 wrapped by a rubber protective layer on the outside, and an inner sealing plate 3, an inner steel plate 5 and an inner rubber layer 6 are arranged in parallel with the upper connecting plate 1 and the lower connecting plate 2 inside. , the inner steel plate 5 and the inner rubber layer 6 are arranged at intervals, both ends are sealed with the inner sealing plate 3, and the inner sealing plate 3, the inner steel plate 5 and the inner rubber are connected by vulcanization; the inner sealing plate 3 is provided with threaded holes , used for connection and fixation with the upper connecting plate 1 and the lower connecting plate 2.

The size of the shape memory alloy strand 7 is determined by the shape memory wire according to the force capacity of the building wall components and the actual situation, and is twisted according to the national steel strand twisting standard.

The diameter of the high-strength nut 8 is larger than that of the shape memory alloy stranded wire 7 .

The use method of the above-mentioned replaceable shape memory alloy composite vibration isolation bearing is as follows:

Bolts are used to connect the support to the wall. In this process, the shape memory alloy stranded wire 7 is ensured to be parallel to the outer surface of the building wall; when an earthquake occurs, the safety of the wall and things is protected, the main body of the structure is protected and the wall is improved. structural stability. After the earthquake, unscrew the bolt between the support and the wall, replace the damaged support or shape memory alloy stranded wire 7, replace with a new support or shape memory alloy stranded wire 7, and use it again.

Claims (5)

1. A replaceable shape memory alloy composite shock insulation support is characterized in that: the device comprises an upper connecting plate, a lower connecting plate, a laminated rubber support and a shape memory alloy stranded wire, namely an SMA stranded wire, wherein the upper connecting plate and the lower connecting plate are respectively fixed with the upper surface and the lower surface of the laminated rubber support through fixing bolts; high-strength nuts are welded on the inner sides of the upper connecting plate and the lower connecting plate on the front side and the rear side of the laminated rubber support along the longitudinal direction, and the shape memory alloy stranded wire sequentially penetrates through the high-strength nuts on the upper connecting plate and the lower connecting plate and then is fixed, so that the shape memory alloy stranded wire forms an M shape.

2. The replaceable shape memory alloy composite seismic isolation bearing of claim 1, wherein: the laminated rubber support is a shock insulation rubber support wrapped by a rubber protection layer, an inner sealing plate, an inner steel plate and an inner rubber layer are arranged in parallel with the upper connecting plate and the lower connecting plate, the inner steel plate and the inner rubber layer are arranged at intervals, two ends of the inner steel plate and the inner rubber layer are sealed in the inner sealing plate, and the inner sealing plate, the inner steel plate and the inner rubber are connected through vulcanization; the inner sealing plate is provided with a threaded hole for connecting and fixing the upper connecting plate and the lower connecting plate.

3. The replaceable shape memory alloy composite seismic isolation bearing of claim 1, wherein: the dosage size of the shape memory alloy stranded wire is determined by the shape memory wire according to the stress capability and the actual condition of the building wall component and is twisted according to the national steel stranded wire twisting standard.

4. The replaceable shape memory alloy composite seismic isolation bearing of claim 1, wherein: the diameter of the high-strength nut is larger than that of the shape memory alloy stranded wire.

5. The replaceable shape memory alloy composite seismic isolation bearing of claim 1, wherein: the memory alloy stranded wire of the support is parallel to the outer surface of the building wall.

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