CN211522845U

CN211522845U - Inhaul cable limiting rigidity difference combined rubber damping support

Info

Publication number: CN211522845U
Application number: CN201922287240.5U
Authority: CN
Inventors: 袁万城; 钟海强; 贺金海; 党新志; 杨肖
Original assignee: Tongji University
Current assignee: Tongji University
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-09-18
Anticipated expiration: 2029-12-17

Abstract

The application discloses spacing rigidity difference of cable makes up rubber shock mount comprises top plate and shrouding, stromatolite district, slip district, cable from top to bottom, and wherein the cable runs through the reservation pore of top plate from top to bottom, and the stromatolite district is formed by rubber layer and the coincide of stiffening plate, and the slip district has a plurality of frictional layers of constituteing by sliding steel plate, tetrafluoro slide and stiffening plate. The shock absorption and isolation device is characterized in that the vertical bearing capacity is not changed, the friction layer can slide and displace, the horizontal rigidity of the support is reduced, and the displacement capacity of the support is improved, so that the period is prolonged, and the purpose of shock absorption and isolation is achieved; the sliding surface has certain energy consumption capacity; the cable is tensioned under the action of strong shock, so that the limiting capacity is realized; after the earthquake, the support has certain self-restorability, and can be quickly repaired and replaced. The device can also adapt to larger displacement of the upper structure in a normal use state, and adjust horizontal force and bending moment applied to the abutments with different rigidities.

Description

Inhaul cable limiting rigidity difference combined rubber damping support

Technical Field

The utility model belongs to bridge engineering, antidetonation field, thereby concretely relates to have and can take place local slip in whole type combination cross-section, the earthquake and can reduce rigidity and increase power consumption ability, can also strain the rubber support who restricts the displacement of roof beam body through the cable when major earthquake.

Background

From Wenchuan earthquake, people pay more and more attention to the earthquake resistance of bridges. The earthquake damage shows that the middle-small span bridge adopts more plate type rubber supports, the plate type rubber supports have overlarge shearing rigidity and overlow horizontal deformation capacity and energy consumption capacity, and cannot adapt to the larger displacement requirement in the earthquake, and the large earthquake action, particularly when near fault velocity pulse exists, is easy to damage, so that the displacement of the beam body is overlarge, further the beam body is collided and even falls, and the improvement is needed.

Therefore, the shock absorption and isolation support with larger deformability is provided for people, wherein the widely applied lead core rubber support is as follows: on the basis of the laminated rubber support, one or more lead rods are added inside the laminated rubber support, and the lead rods are subjected to shearing plastic deformation, so that the rigidity is reduced, the structural period is prolonged, and meanwhile, the laminated rubber support has a good energy consumption effect.

However, the lead support has high temperature sensitivity, and needs to be carefully considered when used in a low-temperature environment; the lead core support still cannot restrict the displacement of the beam body under the action of large shock; in addition, the lead support is easy to pollute the environment in the manufacturing, using and maintaining processes, and the waste lead treatment after the support is replaced is also a non-trivial environmental problem.

Considering that the plate type rubber support in the medium and small span bridge is widely applied, the shock absorption and isolation performance and the displacement capability of the support are improved on the premise of keeping the original advantages of the plate type rubber support; further, it is desirable to be able to limit the displacement of the superstructure under high shock.

Disclosure of Invention

For solving above-mentioned problem, this application is on plate rubber support basis, place certain area's tetrafluoro slide and slip steel sheet formation slip district on a plurality of layers of stiffening steel sheet, rubber layer and stiffening steel sheet stromatolite bond on every side and form the lamination zone, relative slip can take place between tetrafluoro slide and the slip steel sheet, and on this basis, set up a plurality of strings that run through roof from top to bottom, certain length, the deformation range of support body can effectively be retrained to the cable, form the spacing rigidity difference combination rubber shock mount of cable.

In order to achieve the purpose, the technical scheme is as follows:

a inhaul cable limiting rigidity difference combined rubber shock absorption support is characterized by comprising an upper top plate (1), anchor bolts (2), a shear block (3), an upper sealing plate (4), a lower top plate (11), a lower sealing plate (12), a plurality of inhaul cables (13), a laminated area (14) and a sliding area (15); the laminated layer (14) is formed by laminating a rubber layer (9) and a stiffening steel plate (8), and the rubber layer and the stiffening steel plate are vulcanized and bonded; a plurality of friction layers (5) are arranged in the sliding area (15), each friction layer consists of a sliding steel plate (6), a tetrafluoro sliding plate (7) and a stiffening steel plate (8), the tetrafluoro sliding plate (7) is reliably bonded with the sliding steel plate (6), and the tetrafluoro sliding plate (7) and the stiffening steel plate (8) can relatively slide;

the upper sealing plate (4) and the lower sealing plate (12) are respectively and reliably connected with an external structure through an upper top plate (1) and a lower top plate (11);

go up a plurality of tunnels of reservation of roof (1), roof (11) down, each cable (13) pass the reservation tunnel of roof (1), roof (11) down, and cable (13) subassembly and last roof (1), (11) form to be connected to guarantee that the relative displacement of roof (1), roof (11) down takes place too big shear deformation within the design specified range, avoid the rubber support. This application sets up the cable of a plurality of roof, certain length about running through, the deformation range of support body can effectively be retrained to the cable, forms the spacing rigidity difference combination rubber shock mount of cable.

By way of example only, the upper top plate (1) and the lower top plate (11) are provided with bolt holes and are connected with embedded parts of external structures (such as beam bottoms and pier tops); it may also be achieved by welding. The beam bottom, pier top, etc. are merely examples, are not limiting, and are applicable to the utility model discloses the support scene at all.

Furthermore, an auxiliary mechanism is arranged between the upper top plate (1) and the upper sealing plate (4) and between the lower top plate (11) and the lower sealing plate (12) so as to ensure the integrity between the support body and the top plate.

The auxiliary mechanism is structurally realized: adopting an anchor bolt (2) and a shear block (3); the upper top plate (1) is positioned on the upper side of the upper sealing plate (4) and is in close contact with the upper sealing plate, the upper top plate (1) is provided with a bolt hole, and an anchor bolt (2) is adopted to form bolting with the upper sealing plate;

grooves are formed in one side of the joint of the upper top plate (1) and the upper sealing plate (4), the anti-shearing blocks (3) are placed in the grooves, the anti-shearing blocks (3) are tightly contacted with the upper top plate (1) and the upper sealing plate (4), and the anti-shearing blocks have the function of transferring shearing force between the upper top plate (1) and the upper sealing plate (4);

the same structure and mechanism are as follows:

lower roof (11) are located shrouding (12) downside down, and both in close contact with, and the bolt hole is seted up to lower roof (11), adopts anchor bolt (2) and lower shrouding to form the bolt joint, and lower roof (11) all set up the groove with one side of shrouding (12) department of meeting down, places anti-shear block (3) in the groove, and anti-shear block (3) and lower roof (11), lower shrouding (12) in close contact with, the shear force between roof (11) and lower shrouding (12) under its function is for the transmission.

The inhaul cable limiting rigidity difference combined rubber shock absorption support is characterized by further comprising a rubber protective layer (10); the rubber protective layer (10) surrounds the outer part of the support, namely the rubber protective layer (10) surrounds the periphery of the stiffening steel plate (8) and the plane of the upper sealing plate (4) and the lower sealing plate (12).

In this application, upper and lower roof adopts the steel sheet, and shape and size can be adjusted according to the design needs, and the support is placed and is prevented to drop under the earthquake action in the recess of upper and lower roof.

In this application, upper and lower roof has the bolt hole, can reliably be connected with the built-in fitting at the bottom of the roof beam, mound top.

In this application, the cable link up in upper and lower roof, and the free stroke of cable can be adjusted according to the allowable support displacement of design, and the quantity of cable can be adjusted according to the support size of design and design abutment internal force.

In the application, the stiffening steel plate is a whole and is shared by the laminated area and the sliding area, so that the support displacement coordination is ensured.

In the present application, the sliding steel plate may be made of any material that can slide relative to the tetrafluoro sliding plate.

In this application, the frictional layer both can select the contact surface of tetrafluoro skateboard and sliding steel plate as sliding friction surface, also can select the contact surface of tetrafluoro skateboard and stiffening steel plate as sliding friction surface.

In this application, the tetrafluoro slide size of sliding region is unanimous with the sliding steel plate size, and the shape and the size of overlapping region and sliding region can be adjusted according to the design needs.

In the application, the tetrafluoro slide plate is a friction plate in the technical scheme and is used for forming relative sliding with a sliding steel plate. It is not exhaustive, and the tetrafluoro skateboard can be replaced by various panels made of wear-resistant materials such as modified polytetrafluoroethylene boards, modified ultra-high molecular weight ethylene boards and the like.

In the application, the thinning and layering of the single-layer friction layer in the sliding region along the thickness direction comprise the thicknesses and positions of the sliding steel plate and the tetrafluoro sliding plate, and can be adjusted according to design requirements;

in the application, the number of layers of the friction layer in the sliding area can be adjusted according to design requirements.

The working principle of this application does:

the structure of the inhaul cable limiting rigidity difference combined rubber shock absorption support is similar to that of a plate type rubber support, and the vertical bearing capacity of the support is not changed;

on the horizontal direction, the frictional layer has in the difference combination rubber shock mount's of the spacing rigidity difference of cable sliding region, and relative slip can take place on this layer promptly, and the horizontal deformation of support can be provided jointly by the shearing deformation of rubber and the frictional layer sliding friction deformation in the sliding region to use the same stiffened steel plate jointly through overlapping region and sliding region, coordinate two kinds of deformations, the wholeness and the displacement adaptability of support also obtain improving.

The shear rigidity of the support is reduced, the period of the bridge is prolonged, the structural earthquake dynamic response is reduced, the earthquake reduction and isolation effect is achieved, and the effect can be adjusted by adjusting the size of the sliding area and the number of friction layers;

under the action of an earthquake, a plurality of friction layers can slide simultaneously and are restrained by the rubber layers of the laminated layer so as not to cause overlarge and unstable interlayer displacement, and therefore, the energy-consuming capacity is certain under the action of reciprocating horizontal force;

under the strong shock effect, when the support displacement surpassed the free stroke of cable, the cable played a role, can restrict the further relative displacement of support, avoided falling roof beam, roof beam body collision, expansion joint destruction etc..

After the earthquake, the rubber has elastic restoring force and is easy to restore to the initial state, and the bridge is ensured to have the function of serving as an earthquake relief and rush repair main road.

The internal force borne by the abutment can be adjusted by adjusting the size of the sliding area under the normal working state, and the large displacement of the upper structure caused by the temperature action and the like is adapted.

This application mainly provides following advantage:

1. the utility model provides a spacing rigidity difference of cable combination rubber shock mount places tetrafluoro slide and slip steel sheet through on a plurality of layers of stiffening steel sheet at plate rubber support for the support has the slip ability, and is retrained by lamination zone rubber layer and can not lead to the too big unstability of displacement between the layer. Because the sliding area and the laminated area share the stiffening steel plate, the sliding deformation and the rubber shearing deformation can be coordinated, the support displacement adaptability is further improved, and the support can adapt to larger displacement under the normal use state and the earthquake action.

2. The device provided by the application fully embodies the principle of seismic isolation and reduction, namely embodies the balance relation between force and displacement, reduces the horizontal rigidity of the support by introducing the local sliding friction deformation of the support, and fully prolongs the structural period, thereby reducing the seismic response of the bridge; the over-large displacement of the beam body can be limited through the stay cable under the action of strong shock; and can be restored by the elastic restoring force of the rubber after the earthquake.

3. The device manufacturing process that this application provided is similar with plate rubber support, has characteristics such as production simple process, convenient to use, cost are lower.

4. The device that this application provided does not cause the weakening of vertical bearing capacity as the improvement to the board formula rubber support, and the size can be adjusted according to the design needs, if: the area of the sliding area can be adjusted, so that the normal use of the bridge structure and the load distribution under the action of earthquake can be adjusted, and the displacement under different conditions can be adapted; adjusting the free stroke of the stay cable according to the designed allowable displacement; and adjusting the section size and the number of the stay cables according to the internal force and the cable force of the abutment.

5. The device provided by the application is made of environment-friendly and durable materials, avoids the pollution of the lead support to the environment, and is favorable for sustainable development.

In summary, the sliding friction deformation of the sliding surface can be introduced while the vertical bearing capacity is not weakened, the coordination between the sliding friction deformation and the rubber shearing deformation is improved through the shared stiffening steel plate, and the displacement capacity of the support is improved; the horizontal rigidity of the support is reduced, the support is suitable for larger upper structure displacement in a normal use state, the structure period is prolonged, and the earthquake action borne by the structure is reduced; furthermore, the device can generate friction sliding on a plurality of sliding surfaces, and has certain energy consumption capacity during earthquake; furthermore, under the action of a large shock, the device has the limiting capacity by being tensioned through the stay cable; furthermore, the device has elastic restoring force and can be reset after an earthquake.

Can synthesize rigidity demand, the displacement demand of considering earthquake effect and normal use state to and require to carry out the size adjustment of this application device according to pier internal force distribution.

Description of the drawings:

the accompanying drawings are examples of the present application, in which:

FIG. 1 cross-sectional view of inhaul cable limiting rigidity difference combined rubber shock absorption support

FIG. 2 plan view of inhaul cable limiting rigidity difference combined rubber shock absorption support

FIG. 3 is an elevation view of a combination rubber damping support with inhaul cable limiting rigidity difference

Reference numbers in the figures: the structure comprises an upper top plate 1, an anchor bolt 2, a shear block 3, an upper sealing plate 4, a friction layer 5, a sliding steel plate 6, a tetrafluoro sliding plate 7, a stiffening steel plate 8, a rubber layer 9, a rubber protection layer 10, a lower top plate 11, a lower sealing plate 12, a guy cable 13, a laminated layer 14 and a sliding region 15.

Detailed Description

In order to make the technical spirit and advantages of the present application more clearly understood by examiners of the patent office and especially by the public, the applicant shall hereinafter describe in detail, by way of example, with reference to the accompanying drawings, but the description of the examples is not intended to limit the scope of the present application, and any equivalents in form only and not in substance, which are made according to the spirit of the present application shall be considered as the scope of the present application.

Example 1: referring to fig. 1-3, the inhaul cable limiting rigidity difference combined rubber shock absorption support is internally composed of an upper top plate 1, an upper sealing plate 4, a lower top plate 11, a lower sealing plate 12, inhaul cables 13, a lamination zone 14 and a sliding zone 15; the upper top plate 1 (or the lower top plate 11) and the upper sealing plate 4 (or the lower sealing plate 12) are reliably connected through the anchor bolts 2 and the shear blocks 3; the laminated area 14 is formed by laminating a rubber layer 9 and a stiffening steel plate 8, the sliding area 15 is provided with a plurality of friction layers 5, and each friction layer consists of a sliding steel plate 6, a tetrafluoro sliding plate 7 and a stiffening steel plate 8; a rubber protector 10 surrounds the exterior of the stiffening steel plates 8 and the

closure plates

4, 12.

The tetrafluoro slide plate 7 is bonded with the sliding steel plate 6 and can slide relative to the stiffening steel plate 8.

The lamination zone 14, the sliding zone 15 share the same stiffening plate 8 in each layer.

In the production process of the sliding steel plate 6, the contact surface of the sliding steel plate 6 and the tetrafluoro sliding plate 7 needs to be polished smoothly without coating a binder, and the contact surface of the sliding steel plate 6 and the stiffening steel plate needs to be roughened and coated with the binder for integral vulcanization bonding.

In the production process, the contact surfaces of the stiffening steel plates 8, the rubber layer 9 and the tetrafluoro sliding plate 7 need to be roughened and coated with a binder for integral vulcanization and bonding.

The device is characterized in that holes are reserved in an upper top plate 1 and a lower top plate 11, and the holes are reliably connected with reserved pieces embedded in a bridge, a pier and a platform through bolts.

Each bundle of the guy cable 13 passes through the reserved hole of the upper top plate 1 and the reserved hole of the lower top plate 11 respectively.

As a further variation of the embodiments of the present application, the tetrafluoro slide plate of each friction layer may be replaced with other materials that facilitate sliding friction.

As a further variation of the embodiments of the present application, the friction layer in the sliding region may be one or more, forming a combined cross-section with the lamination region.

As another alternative to the embodiment of the present application, the sliding steel plate may be replaced with another material that can slide relative to the tetrafluoro sliding plate.

As still another variation of the embodiment of the present application, the positions, thicknesses and sizes of the sliding steel plate and the tetrafluoro sliding plate may be changed.

As another alternative to the embodiment of the present application, the frictional sliding surface may be replaced by the contact surface between the tetrafluoro slider and the sliding steel plate, and the contact surface between the tetrafluoro slider and the stiffening steel plate may be polished smooth and may not be coated with the adhesive, while the non-sliding surface may be roughened and coated with the adhesive.

As a further variation of the embodiments of the present application, the anchor bolts and shear blocks may be replaced with other reliable anchoring devices.

As a further variation of the embodiment of the present application, the number, cross-sectional dimension, and free stroke of the cables can all be adjusted.

As another alternative to the embodiment of the present application, the sliding steel plate may be replaced with another material that facilitates the sliding of the tetrafluoro slider.

As a further variation of the embodiments of the present application, the bonding between the stiffening steel plates and the rubber layer and the tetrafluoro slider may be varied.

When the support is designed by the simplest support example of a highway beam bridge, firstly, the area of the support is determined according to the vertical counter force of the support in the normal use state, and the horizontal rigidity and the thickness of the support are determined by using finite element software on the premise of meeting the requirement of allowing the support to displace in the normal use state and ensuring that the sufficient seismic reduction and isolation effect can be exerted under the action of an earthquake, so that the size of a sliding area is determined; simultaneously, the size of the sliding area can be adjusted to adjust the pier internal force with different rigidity, so that the pier internal force is as uniform as possible under the conditions of normal use or earthquake action. Further, under the action of strong shock, an allowable displacement value is determined according to design requirements such as no beam falling, beam body collision, expansion joint damage and the like, the free stroke of the guy cable is determined according to the allowable displacement value, and the number and the section size of the guy cable are determined according to the design abutment internal force, the support size and the guy cable internal force.

This application is spacing rigidity difference combination rubber shock mount of cable has four effects when the earthquake takes place:

horizontal rigidity is reduced, the period is increased, the excellent period of a field can be staggered, and seismic isolation and reduction effects are achieved;

the sliding area can consume seismic energy to a certain extent through friction sliding, and cannot cause instability under the constraint of the laminated area.

Under the action of strong shock, the support shifts to reach the free stroke of the stay cable, and the stay cable is tensioned to limit further displacement, so that the relative displacement between the beam body and the lower structure is reduced, and damages such as beam falling, beam body collision, expansion joints and the like are avoided;

after the earthquake, the support can be restored to be close to the original shape by the elastic restoring force of the rubber.

In addition, can be according to the displacement demand, the pier internal force distribution demand of normally used rigidity demand, superstructure under the effect such as temperature, adjust the size in inside sliding region, and construction process is simple, and the maintenance of being convenient for change like plate rubber support is pollution-free to the environment, has sustainability and developability.

On the premise of ensuring the vertical bearing capacity of the support, the friction layer in the sliding area is allowed to slide relatively, and the displacement of the support is provided by the shearing deformation of the rubber and the sliding deformation of the friction layer, so that the horizontal rigidity of the support is reduced, and the support can adapt to larger deformation of an upper structure under the action of temperature in a normal use state; under the action of earthquake, the structure period can be prolonged, and sliding friction is generated in a constrained state, so that the energy consumption capability is certain, the dynamic response of the structure is reduced, and the seismic isolation and reduction effect is achieved; the cable is tensioned under the action of strong shock, so that the limiting capacity is realized; the support has self-recovery after earthquake. Further, the horizontal stiffness of the support can be adjusted by adjusting the size and number of sliding zones, making the forces in the substructure as uniform as possible.

The size, number, materials and shape of the friction layer of the sliding area can be adjusted according to specific conditions, and any equivalent changes which are made according to the conception of the application and are only in form but not substantial should be considered as the technical scope of the application.

The material, number, length and section size of the inhaul cable can be adjusted according to specific conditions, and any equivalent changes which are made according to the conception of the application and are only in form but not substantive should be regarded as the technical scope of the application.

The laminated area and the sliding area form a combined section, the same stiffening steel plate is used together, and the laminated area and the sliding area can be integrally deformed and have harmony; in addition, the support can be integrally processed, is simple and convenient to manufacture, can reduce the engineering cost input and the design and construction difficulty, and is particularly suitable for medium and small-span continuous highway bridges.

Claims

1. A inhaul cable limiting rigidity difference combined rubber shock absorption support is characterized by comprising an upper top plate (1), anchor bolts (2), a shear block (3), an upper sealing plate (4), a lower top plate (11), a lower sealing plate (12), a plurality of inhaul cables (13), a laminated area (14) and a sliding area (15); the laminated layer (14) is formed by laminating a rubber layer (9) and a stiffening steel plate (8), and the rubber layer and the stiffening steel plate are vulcanized and bonded; a plurality of friction layers (5) are arranged in the sliding area (15), each friction layer consists of a sliding steel plate (6), a tetrafluoro sliding plate (7) and a stiffening steel plate (8), the tetrafluoro sliding plate (7) is reliably bonded with the sliding steel plate (6), and the tetrafluoro sliding plate (7) and the stiffening steel plate (8) can relatively slide;

go up a plurality of pore ways of reservation of roof (1), roof (11) down, each cable (13) pass the reservation pore way of roof (1), roof (11) down, and cable (13) subassembly and last roof (1), roof (11) form to be connected down to guarantee that the relative displacement of roof (1), roof (11) down takes place too big shear deformation within the design specified range, avoid the rubber support.

2. The inhaul cable limiting rigidity difference combined rubber shock absorption support saddle as claimed in claim 1, wherein auxiliary mechanisms are arranged between the upper top plate (1) and the upper sealing plate (4) and between the lower top plate (11) and the lower sealing plate (12) to ensure the integrity between the support saddle body and the top plate;

the same structure and mechanism are as follows:

3. A stay limiting rigidity difference combined rubber shock absorption support according to claim 1 or 2, characterized in that the support further comprises a rubber protection layer (10);

the rubber protective layer (10) surrounds the outer part of the support, namely the rubber protective layer (10) surrounds the periphery of the stiffening steel plate (8) and the plane of the upper sealing plate (4) and the lower sealing plate (12).