CN222975646U - A planar isotropic SMA cable shock-absorbing bearing - Google Patents
A planar isotropic SMA cable shock-absorbing bearing Download PDFInfo
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- CN222975646U CN222975646U CN202421981026.4U CN202421981026U CN222975646U CN 222975646 U CN222975646 U CN 222975646U CN 202421981026 U CN202421981026 U CN 202421981026U CN 222975646 U CN222975646 U CN 222975646U
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- sma cable
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Abstract
本实用新型提供了一种平面各向同性SMA拉索减震支座，包括顶板和底板，顶板与底板之间设置有支座主体，支座主体顶端上固定连接有钢垫板，顶板底端固定安装有不锈钢板，钢垫板上固定安装有四氟板，四氟板顶端紧贴不锈钢板，顶板顶端上设置有安装槽，安装槽内设置有SMA拉索，SMA拉索两端固定安装有锚头，底板上两侧通过螺栓固定安装有锚板，螺栓上固定安装用于卡住锚头的卡块。本实用新型在现有支座基础上增设SMA拉索，可防止落梁及减少震后梁体残余位移，显著提升桥梁地震韧性，在大位移下能够提供水平递增刚度，有效减轻梁体惯性力对墩柱的冲击作用，SMA拉索变形能力强，能够很好适应强震引发的墩梁大位移。
The utility model provides a planar isotropic SMA cable shock-absorbing bearing, including a top plate and a bottom plate, a bearing body is arranged between the top plate and the bottom plate, a steel pad is fixedly connected to the top of the bearing body, a stainless steel plate is fixedly installed at the bottom end of the top plate, a polytetrafluoroethylene plate is fixedly installed on the steel pad, the top of the polytetrafluoroethylene plate is tightly attached to the stainless steel plate, a mounting groove is arranged on the top of the top plate, an SMA cable is arranged in the mounting groove, anchor heads are fixedly installed at both ends of the SMA cable, anchor plates are fixedly installed on both sides of the bottom plate by bolts, and a clamping block for clamping the anchor head is fixedly installed on the bolts. The utility model adds an SMA cable on the basis of the existing bearing, which can prevent the beam from falling and reduce the residual displacement of the beam body after the earthquake, significantly improve the seismic toughness of the bridge, can provide horizontal incremental stiffness under large displacement, effectively reduce the impact of the inertia force of the beam body on the pier column, and the SMA cable has strong deformation ability and can well adapt to the large displacement of the pier and beam caused by strong earthquakes.
Description
Technical Field
The utility model belongs to the technical field of bridge engineering, and particularly relates to a planar isotropic SMA inhaul cable damping support.
Background
The earthquake fracture zone is very developed at the intersection of the Pacific earthquake zone and the Himalayan earthquake zone in China, and the earthquake activity in China has the characteristics of shallow earthquake source, high intensity, high frequency, wide distribution and the like. The bridge is used as an important node in a traffic system, and is extremely easy to damage under the action of strong shock, and the main damage comprises beam falling, support damage, overlarge residual displacement of the main beam, bending and shearing damage of pier columns and the like.
The middle and small span bridge mainly adopts plate rubber support, basin-type support, ball steel support and the like, and the supports are difficult to play roles of preventing beam falling, balancing upper and lower inertia forces and self-resetting after earthquake under the strong earthquake action.
Nickel-titanium Shape Memory Alloy (SMA) is used as an intelligent material, and has super-elastic effect in a certain temperature range, namely the material has good self-resetting performance after unloading. Meanwhile, the nickel-titanium SMA material has good deformability, and the fracture strain is more than 10%. Compared with wires, the SMA inhaul cable is convenient to anchor and can provide large resistance.
Therefore, the rectangular SMA inhaul cable arranged between the top and the bottom plates of the support can play roles in preventing beam falling, consuming energy, reducing residual displacement of the post-earthquake beam body and balancing the inertial force of the upper and lower structures.
Disclosure of utility model
The utility model aims to solve the technical problems of the prior art and provides a planar isotropic SMA inhaul cable damping support which has the advantages of large displacement capacity, strong directional adaptability, simple structure and convenient installation and replacement, and can effectively reduce Liang Tizhen post residual displacement, prevent beam falling and balance the inertial force of an upper structure and a lower structure.
In order to solve the technical problems, the technical scheme is that the planar isotropic SMA inhaul cable damping support is arranged between a main beam and a cover beam and comprises a top plate and a bottom plate, the main beam is fixedly connected with the top plate through bolts, the cover beam is fixedly connected with the bottom plate through bolts, and a support main body is arranged between the top plate and the bottom plate.
The support is characterized in that a rubber plate is fixedly arranged on the top end of the support body, a steel backing plate is arranged on the rubber plate, a stainless steel plate is arranged at the bottom end of the top plate, a tetrafluoro plate is fixedly arranged on the steel backing plate, and the top end of the tetrafluoro plate is tightly attached to the stainless steel plate. The stainless steel plate is contacted with the tetrafluoro plate, so that the friction coefficient of the support is lower in the sliding process.
The top plate is provided with a plurality of mounting grooves, SMA inhaul cables are arranged in the mounting grooves, and the number of the SMA inhaul cables is calculated and determined according to the anti-seismic requirement.
The SMA inhaul cable is characterized in that anchor heads are fixedly mounted at two ends of the SMA inhaul cable, anchor plates are fixedly mounted on two sides of the bottom plate through a plurality of bolts, the size and the number of the bolts are selected according to the transmitted shearing force value, and the number of the bolts is more than that of the SMA inhaul cable.
And a clamping block is fixedly arranged on the bolt and used for clamping the anchor head.
Preferably, the support main body is a plate-type rubber support, a basin-type rubber support, a ball steel support, a high damping rubber support, a lead rubber support or a friction pendulum support, and the device can be used for reinforcing the existing bridge.
Preferably, the mounting groove is the rectangle groove, the SMA cable cross section is the rectangle, and the SMA cable can not take place to roll, is difficult to break away from the mounting groove, and the steadiness is good.
Compared with the prior art, the utility model has the following advantages:
According to the bridge girder and bridge girder support, the SMA inhaul cable is additionally arranged on the basis of the existing support, so that girder falling can be prevented, residual displacement of a girder body after earthquake is reduced, the earthquake toughness of the bridge is remarkably improved, horizontal incremental rigidity can be provided under large displacement, the impact of the inertia force of the girder body on a pier column is effectively reduced, the deformation capacity of the SMA inhaul cable is high, the bridge girder and girder support can be well adapted to large displacement caused by strong earthquake, the direction adaptability of the bridge girder and bridge girder support is high, and the earthquake resistance of the bridge girder under the condition of multidimensional strong earthquake can be effectively improved.
The utility model is described in further detail below with reference to the drawings and examples.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a mounting structure diagram of the present utility model.
Fig. 3 is a schematic view of the installation direction of the present utility model.
Fig. 4 is a schematic view of the use state of the present utility model.
Fig. 5 is a schematic diagram of the horizontal constitutive relationship of the present utility model.
Reference numerals illustrate:
1-top plate, 2-bottom plate, 3-anchor plate;
4-SMA inhaul cable, 5-anchor head, 6-main beam;
7-a bent cap, 8-a bolt and 9-a stainless steel plate;
10-tetrafluoro plate, 11-steel backing plate, 12-rubber plate;
13-steel basin.
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the utility model, which is therefore not limited to the specific embodiments disclosed below.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
As shown in fig. 1-5, the utility model provides a planar isotropic SMA cable shock mount, which is arranged between a main beam 6 and a cover beam 7, and comprises a top plate 1 and a bottom plate 2, wherein the main beam 6 is fixedly connected with the top plate 1 through bolts, the cover beam 7 is fixedly connected with the bottom plate 2 through bolts, and a mount main body is arranged between the top plate 1 and the bottom plate 2.
The support is characterized in that a rubber plate 12 is fixedly arranged on the top end of the support body, a steel base plate 11 is arranged on the rubber plate 12, a stainless steel plate 9 is fixedly arranged at the bottom end of the top plate 1, a tetrafluoro plate 10 is fixedly arranged on the steel base plate 11, and the top end of the tetrafluoro plate 10 is tightly attached to the stainless steel plate 9. The stainless steel plate 9 is contacted with the tetrafluoro plate 10, so that the friction coefficient of the support seat is lower in the sliding process.
A plurality of mounting grooves are formed in the top end of the top plate 1, SMA inhaul cables 4 are arranged in the mounting grooves, and the number of the SMA inhaul cables 4 is calculated and determined according to the anti-seismic requirement.
The two ends of the SMA inhaul cable 4 are fixedly provided with anchor heads 5, the two sides of the bottom plate 2 are fixedly provided with anchor plates 3 through a plurality of bolts 8, the size and the number of the bolts 8 are selected according to the transmitted shearing force value, and the number of the bolts 8 is more than that of the SMA inhaul cables 4.
And a clamping block is fixedly arranged on the bolt 8 and used for clamping the anchor head 5.
In this embodiment, the support main part is board-like rubber support, basin-type rubber support, ball steel support, high damping rubber support, lead core rubber support or friction pendulum support, and this device can be used to the reinforcement of current bridge.
In this embodiment, the mounting groove is the rectangle groove, SMA cable 4 cross section is the rectangle, and SMA cable 4 can not take place to roll, is difficult to break away from the mounting groove, and the steadiness is good.
When the device is applied to bridges adopting basin-type rubber supports, the steel basin 13 is fixedly arranged on the top end of the bottom plate 2, the rubber plate 12 is arranged on the top end of the steel basin 13, the steel backing plate 11 is arranged on the top end of the rubber plate 12, the tetrafluoro plate 10 is adhered to the steel backing plate 11, the top end of the tetrafluoro plate 10 is tightly attached to the stainless steel plate 9, and the stainless steel plate 9 is contacted with the tetrafluoro plate 10, so that the friction coefficient of the supports in the sliding process is lower.
Under the action of strong vibration, the top plate 1 is subjected to plane displacement relative to the bottom plate 2, as shown in fig. 4.
The SMA inhaul cable 4 is forced to deform, the rigidity of the SMA inhaul cable 4 is lower when the displacement is smaller in the stretching process, the shock absorption support can play a role in shock absorption and energy consumption, and when the displacement is larger, the horizontal rigidity is larger and increases progressively, and large constraint force can be provided to limit the relative displacement of the pier beams, as shown in figure 5.
Because the SMA inhaul cable 4 has super-elastic effect, the residual displacement of the support can be effectively reduced.
The SMA inhaul cable 4 has strong deformability, and the length of the SMA inhaul cable 4 is obviously increased through rectangular layout, so the device can adapt to the large displacement of the pier beam caused by strong shock, thereby achieving the effects of preventing beam falling, reducing residual displacement of a support after shock, reducing pier column impact and balancing the inertia force of the main beam and the pier column.
The device has strong directional adaptability and can be applied to linear bridges, curved bridges and inclined bridges.
The device has simple structure and convenient installation and replacement of the SMA inhaul cable 4, and can ensure the quick recovery of the bridge function after earthquake.
The above description is only of the preferred embodiments of the present utility model, and is not intended to limit the present utility model. Any simple modification, variation and equivalent variation of the above embodiments according to the technical substance of the utility model still fall within the scope of the technical solution of the utility model.
Claims (3)
1. The planar isotropic SMA inhaul cable shock mount is arranged between a main beam (6) and a cover beam (7) and is characterized by comprising a top plate (1) and a bottom plate (2), wherein the top plate (1) is fixedly connected with the main beam (6), and a mount main body is arranged between the top plate (1) and the bottom plate (2) and fixedly connected with the cover beam (7);
A rubber plate (12) is fixedly arranged on the top end of the support main body, a steel base plate (11) is arranged on the rubber plate (12), a stainless steel plate (9) is fixedly arranged at the bottom end of the top plate (1), a tetrafluoro plate (10) is fixedly arranged on the steel base plate (11), and the top end of the tetrafluoro plate (10) is tightly attached to the stainless steel plate (9);
be provided with many mounting grooves on roof (1) top, be provided with SMA cable (4) in the mounting groove, SMA cable (4) both ends fixed mounting has anchor head (5), both sides are through a plurality of bolts (8) fixed mounting anchor board (3) on bottom plate (2), fixed mounting has the fixture block on bolt (8), the fixture block is used for blocking anchor head (5).
2. The planar isotropic SMA cable shock mount of claim 1, wherein the mount body is a plate rubber mount, a bowl rubber mount, a ball steel mount, a high damping rubber mount, a lead rubber mount, or a friction pendulum mount.
3. A planar isotropic SMA cable shock mount according to claim 1 wherein the mounting groove is a rectangular groove and the SMA cable (4) is rectangular in cross section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421981026.4U CN222975646U (en) | 2024-08-15 | 2024-08-15 | A planar isotropic SMA cable shock-absorbing bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421981026.4U CN222975646U (en) | 2024-08-15 | 2024-08-15 | A planar isotropic SMA cable shock-absorbing bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222975646U true CN222975646U (en) | 2025-06-13 |
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ID=95977542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421981026.4U Active CN222975646U (en) | 2024-08-15 | 2024-08-15 | A planar isotropic SMA cable shock-absorbing bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222975646U (en) |
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2024
- 2024-08-15 CN CN202421981026.4U patent/CN222975646U/en active Active
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