CN211596377U - Take subtract isolation bearing of cable - Google Patents
Take subtract isolation bearing of cable Download PDFInfo
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- CN211596377U CN211596377U CN201922223783.0U CN201922223783U CN211596377U CN 211596377 U CN211596377 U CN 211596377U CN 201922223783 U CN201922223783 U CN 201922223783U CN 211596377 U CN211596377 U CN 211596377U
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Abstract
The utility model provides a take subtract isolation bearing of cable. Comprises an upper support plate, a lower support plate, a spherical plate and a buffer unit; the spherical panel is arranged between the upper support plate and the lower support plate; the upper support plate and the lower support plate are connected through a buffer unit; the buffer unit comprises a stay cable, a slide block and a buffer piece; two ends of the buffer part are respectively connected with the two inhaul cables through the sliding blocks; the buffer unit transversely penetrates through the upper support plate, and two ends of the buffer unit are connected to the lower support plate; or the buffer unit transversely penetrates through the lower support plate, and two ends of the buffer unit are connected to the upper support plate; or a combination of the two. The utility model discloses introduced the buffer unit, the rigidity of buffer unit changes constantly under the earthquake action, can effectively avoid resonating to can utilize the hysteresis energy consumption. The initial tension of the inhaul cable is adjusted, the sliding requirement of the support can be met, and the use of a shear key between the upper support plate and the lower support plate can be avoided by utilizing the larger initial tension. The buffer unit is matched with the spherical plate for plane friction, and has self-resetting capability.
Description
Technical Field
The utility model relates to a bridge subtracts isolation technology field, concretely relates to take subtracting isolation bearing of cable.
Background
Recent earthquake disasters show that once an earthquake causes serious damage to a traffic line, possible lives and properties and indirect economic losses are more and more huge. The bridge is used as an important throat of a traffic network, and the anti-seismic performance of the bridge is related to whether the whole traffic life line is smooth or not, so that the speed of anti-seismic disaster relief and post-disaster reconstruction is influenced. Therefore, the study of seismic resistance of bridge structures has been a hot issue of attention of scholars.
The bridge seismic design method goes through the traditional strength seismic theory, ductility seismic theory, seismic reduction and isolation technical theory and other stages. The traditional strength anti-seismic theory only designs the strength of the structure, and requires that the structure has enough strength under the action of earthquake to ensure that the structure is not seriously damaged, and the structure adopting the anti-seismic design method usually needs higher initial cost. The ductile seismic theory resists the action of an earthquake by plastic deformation (forming plastic hinges) at selected locations in the structure, and this design allows a large amount of seismic energy to be transmitted to important components of the structure, and since the structure requires plastic deformation at specific locations to consume the seismic energy, damage to the structural components is inevitable and repair work after an earthquake is troublesome. The seismic isolation and reduction technical theory is that on the premise of ensuring that the structure has enough rigidity when in normal use, the flexible support is adopted to prolong the structure period, reduce the internal force response of the structure in earthquake, and meanwhile, energy dissipation elements such as dampers are adopted to limit the structure displacement. The seismic isolation and reduction technology is a simple, convenient, economic and advanced engineering seismic resistance means. By selecting a proper seismic isolation and reduction device and a proper setting position, the internal force distribution of the structure can be effectively controlled.
The shock absorption and isolation support widely used in the bridge structure at present mainly comprises the following types: a basin-type rubber support, a lead core rubber support, a friction pendulum type shock insulation support and the like.
The basin-type rubber support uses the elastic rubber block in the semi-closed steel basin cavity, has the property of fluid in a three-dimensional stress state, and realizes the rotation of an upper structure; meanwhile, the horizontal displacement of the upper structure is realized by the low friction coefficient between the polytetrafluoroethylene plate on the middle steel plate and the stainless steel plate on the upper seat plate. The pot type rubber support has the advantages of large bearing capacity, large horizontal displacement, small friction coefficient, large corner, low building height of the support, steel saving and the like. However, the rubber in the support member is easily aged and needs to be replaced frequently, which increases the cost of the support; in order to meet the normal use of the rubber support, a stop block type shear key is often arranged around the support, and under the action of an actual earthquake, the support is clamped with the stop blocks on two sides and cannot normally move; moreover, it is difficult to achieve self-reset after a shock.
The lead core rubber support is formed by inserting one or more lead rods into a common plate type rubber support, and the horizontal shearing resistance of the support is increased by adding the lead rods, so that the damping performance of the support is well improved. The lead rubber support bears vertical load and horizontal load, so that the lead generates hysteresis damping plastic deformation and provides horizontal restoring force through rubber. The lead core rubber support has a plump hysteresis curve, so that the lead core rubber support has a good damping effect. However, rubber is hardened at low temperature, the lead causes irreparable pollution to the environment in the production and use processes, the stability of a single lead is poor, and the lead is subjected to fatigue shear failure under the action of temperature and traffic load (low cycle fatigue), so that the damping performance of the support is greatly reduced.
The friction pendulum type shock insulation support is essentially a friction damping support, and the working principle of the friction pendulum type shock insulation support is that a swing sliding block at the center of the support generates swing displacement along a concave spherical surface of a lower support plate during earthquake, the self-vibration period of the structure is prolonged by utilizing a pendulum mechanism, the earthquake energy is consumed by utilizing the friction force between sliding layers, so that the effect of the earthquake force is reduced, and the support after the earthquake has certain self-resetting capability under the action of the gravity of an upper structure. However, the general friction pendulum type support can lift the upper structure under the action of earthquake, and the damage of a pavement layer or a track structure can be caused. Furthermore, it may happen that the stop means on one side are sheared and the stop means on the other side are not sheared, which will result in the superstructure always swinging on one side of the initial position.
When the stay cable is used for seismic isolation and reduction, the stay cable is generally directly anchored between an upper seat plate and a lower seat plate of the support, the stay cable does not have the capability of variable rigidity work, and the earthquake force transmitted to the lower structure is very large due to the large rigidity of the stay cable, so that the lower structure is possibly damaged.
At present, the problems still exist in China due to the fact that more bridge seismic isolation and reduction supports are used:
the pot type rubber support has the following defects: 1) the rubber in the support member is easy to age and needs to be replaced frequently; 2) under the action of an actual earthquake, the situation that the support is clamped with the stop blocks at the two sides and cannot move normally occurs sometimes; 3) and the self-resetting function after the earthquake is not achieved.
The lead core rubber support has the following defects: 1) the rubber has hardening phenomenon under the condition of low temperature; 2) the lead core causes irreparable pollution to the environment in the production and use processes; 3) the stability of a single lead core is poor, and the lead core can generate fatigue shearing damage under the action of temperature and traffic load (low cycle fatigue), so that the damping performance of the support is greatly reduced.
The friction pendulum type support has the following defects: 1) the problem of beam lifting exists under the action of earthquake; 2) it may happen that the one-sided shear member is not sheared off and the superstructure is swung only one-sided in the initial position.
The defects of the guy cable application are as follows: the capability of variable rigidity work is not provided.
In conclusion, an earthquake reduction and isolation support with a guy cable is urgently needed to solve the problems in the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a take isolation bearing of subtracting of cable to solve the current isolation bearing that subtracts easy ageing, do not possess after shaking from reset function, have "lift roof beam" phenomenon scheduling problem.
In order to achieve the purpose, the utility model provides a seismic isolation and reduction support with a guy cable, which comprises an upper support plate, a lower support plate, a spherical plate and a buffer unit; the spherical panel is arranged between the upper support plate and the lower support plate; the upper support plate and the lower support plate are connected through a buffer unit; the buffer unit comprises a stay cable, a sliding block and a buffer piece; two ends of the buffer part are respectively connected with the two inhaul cables through the sliding blocks; the buffer unit transversely penetrates through the upper support plate, and two ends of the buffer unit are connected to the lower support plate; or the buffer unit transversely penetrates through the lower support plate, and two ends of the buffer unit are connected to the upper support plate; or a combination of the two.
Preferably, the bolster is spring and snakelike billet of parallelly connected setting, and snakelike billet cover is established in the spring.
Preferably, a plurality of first slideway holes are arranged on the upper support plate, and the axial direction of the first slideway holes is parallel to the plate surface of the upper support plate; two sides of the upper support plate are provided with first grooves for mounting rotating shafts, and the rotating shafts are perpendicular to the first slide way holes; the lower surface of the upper support plate is provided with a concave spherical surface.
Preferably, the lower support plate is provided with a plurality of second slide way holes, and the axial direction of the second slide way holes is parallel to the plate surface of the lower support plate; and second grooves for mounting rotating shafts are formed in two sides of the lower support plate, and the rotating shafts are perpendicular to the second slide way holes.
Preferably, the rotating shaft comprises a shaft core and a shaft sleeve sleeved on the shaft core, two ends of the shaft core are fixed in the first groove or the second groove, and the shaft sleeve can rotate around the shaft core.
Preferably, the lower surface of the upper support plate is provided with a first cable anchoring area for anchoring a cable; the upper surface of bottom suspension bedplate is equipped with the second cable anchor district that is used for the anchor cable.
Preferably, the spherical plate comprises a spherical sliding plate, a spherical crown lining plate and a plane sliding plate which are sequentially arranged from top to bottom; the spherical sliding plate is matched with the concave spherical surface, and the plane sliding plate can slide on the upper surface of the lower support plate; the spherical sliding plate and the plane sliding plate are both made of polytetrafluoroethylene materials.
Preferably, the inhaul cable is made of high-strength steel wires, and the sliding block and the spring are made of high-strength structural steel, so that the inhaul cable, the sliding block and the spring are in an elastic range in the using process.
Preferably, the snakelike billet adopts mild steel to make, and its rigidity that can adjust the buffer unit after surging effectively avoids resonating, and the mild steel has good hysteresis characteristic after entering the plasticity state moreover, can absorb seismic energy in a large number in the deformation process of plasticity hysteresis.
Preferably, the buffer unit penetrates through a first slideway hole of the upper support plate, and the guy cable is anchored in a second guy cable anchoring area of the lower support plate by bypassing the rotating shaft on the upper support plate; or the buffer unit penetrates through a second slide way hole of the lower support plate, and the inhaul cable is anchored in the first inhaul cable anchoring area of the upper support plate by bypassing the rotating shaft on the lower support plate.
Use the technical scheme of the utility model, following beneficial effect has:
(1) the utility model discloses in, upper bracket board, bottom suspension bedplate, spherical plate and buffer unit adopt materials such as steel and polymer, avoid using rubber and lead, do not have the problem that rubber is ageing, lead pollutes seriously and lead fatigue failure. The steel belongs to various same-property materials, has high tensile, compression and shear resistance, and has mature manufacturing technology; the polymer material is preferably polytetrafluoroethylene, and forms a movable friction pair with the stainless steel plate, so that the high-performance stainless steel plate has good sliding friction performance. The ball panel and the lower support plate adopt a plane type friction pendulum, so that the problem of 'lifting a beam' is effectively avoided.
(2) The utility model discloses in, introduced the buffer unit who comprises cable, slider, spring and snakelike billet. The snakelike billet adopts mild steel preparation, and its rigidity that can adjust the buffer unit after surging effectively avoids resonating, and it has good hysteresis characteristic after getting into the plastic state moreover, can absorb seismic energy in a large number in the deformation process of plasticity hysteresis. The spring adopts the screw type, connects in parallel with snakelike billet, provides the restoring force. The inhaul cable is connected in series with a parallel system formed by the inhaul cable and the inhaul cable, and the relative displacement of the upper structure and the lower structure is limited. The initial tension of the inhaul cable is adjusted, the sliding requirement of the support can be met, and the use of a shear key between the upper support plate and the lower support plate can be avoided by utilizing the larger initial tension. The buffer unit is matched with the spherical plate for plane friction, and has certain self-resetting capability.
(3) The utility model discloses in, adopt the design of recess-axis of rotation, can change the sliding friction in cable and slide drill way into the stiction of cable and axis of rotation, avoided the cable wire because of with the sliding friction in slide drill way too early destruction.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
FIG. 1 is a three-dimensional view of a mount;
FIG. 2 is an exploded view of the support;
FIG. 3 is a cut-away three-dimensional view;
FIG. 4 is a buffer unit;
wherein, 1-upper support plate, 11-first bolt hole, 12-first cable anchoring area, 13-first slideway hole, 14-first groove, 15-concave spherical surface, 2-lower support plate, 21-second bolt hole, 22-second cable anchoring area, 23-second slideway hole, 24-second groove, 3-rotating shaft, 4-cable, 5-sliding block, 6-spring, 7-serpentine steel bar, 8-spherical panel, 81-spherical sliding plate, 82-plane sliding plate.
Detailed Description
The embodiments of the invention will be described in detail hereinafter with reference to the accompanying drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.
Example 1:
referring to fig. 1 to 4, the seismic isolation and reduction support with the guy cable comprises an upper support plate 1, a lower support plate 2, a spherical plate 8 and a buffer unit; the ball panel 8 is arranged between the upper support plate 1 and the lower support plate 2; the upper seat plate 1 and the lower seat plate 2 are connected by a cushion unit.
The buffer unit comprises a stay cable 4, a sliding block 5 and a buffer piece; two ends of the buffer part are respectively connected with two inhaul cables 4 through sliding blocks 5; the buffer unit crosses the upper support plate 1, and both ends of the buffer unit are connected to the lower support plate 2; and the buffer unit transversely penetrates through the lower support plate 2, and two ends of the buffer unit are connected to the upper support plate 1. The bolster is spring 6 and snakelike billet 7 of parallel arrangement, and snakelike billet 7 cover is established in spring 6.
The stay cable 4 is made of high-strength steel wires, and the sliding block 5 and the spring 6 are made of high-strength structural steel, so that the stay cable 4, the sliding block 5 and the spring 6 are all in an elastic range in the using process. The snake-shaped steel bar 7 is made of mild steel, and the mild steel has good hysteretic characteristic after entering a plastic state and can absorb a large amount of seismic energy in the plastic hysteretic deformation process.
A plurality of first slideway holes 13 are formed in the upper support plate 1, and the axial direction of the first slideway holes 13 is parallel to the plate surface of the upper support plate 1; two sides of the upper support plate 1 are provided with first grooves 14 for mounting the rotating shaft 3, and the rotating shaft 3 is perpendicular to the first slideway hole 13; the lower surface of upper bracket board 1 is equipped with concave spherical surface 15, still is equipped with first bolt hole 11 on the face of upper bracket board 1 for connect bridge superstructure. The lower surface of the upper support plate 1 is provided with a first cable anchoring area 12 for anchoring a cable 4.
A plurality of second slide way holes 23 are formed in the lower support plate 2, and the axial direction of each second slide way hole 23 is parallel to the plate surface of the lower support plate 2; two sides of the lower support plate 2 are provided with second grooves 24 for mounting the rotating shaft 3, and the rotating shaft 3 is perpendicular to the second slideway holes 23. The plate surface of the lower support plate 2 is also provided with a second bolt hole 21 for connecting a bridge lower structure. The upper surface of the lower seat plate 2 is provided with a second cable anchoring area 22 for anchoring the cable 4. The upper support plate 1 and the lower support plate 2 are both made of stainless steel plates.
The rotating shaft 3 comprises a shaft core and a shaft sleeve sleeved on the shaft core, two ends of the shaft core are fixed in the first groove 14 or the second groove 24, and the shaft sleeve can rotate around the shaft core.
The spherical panel 8 comprises a spherical sliding plate 81, a spherical crown lining plate and a plane sliding plate 82 which are arranged from top to bottom in sequence; the spherical sliding plate 81 is matched with the concave spherical surface 15, and the plane sliding plate 82 can slide on the upper surface of the lower support plate 2; the spherical sliding plate 81 and the plane sliding plate 82 are both made of polytetrafluoroethylene materials.
The number of the buffer units is equal to the sum of the number of the first slideway holes 13 and the number of the second slideway holes 23, the first slideway holes 13 and the second slideway holes 23 are vertically arranged, the buffer units penetrate through the first slideway holes 13 of the upper support plate 1, and the guy cables 4 are anchored in the second guy cable anchoring area 22 of the lower support plate 2 by bypassing the rotating shafts 3 on the upper support plate 1; the buffer unit passes through the second slideway hole 23 of the lower support plate 2, and the guy cable 4 is anchored in the first guy cable anchoring area 12 of the upper support plate 1 by bypassing the rotating shaft 3 on the lower support plate 2.
When the seismic isolation and reduction support with the stay cable is used for fixing the support, the stay cable is initially tensioned and then anchored in the stay cable anchoring area, and the horizontal force in a normal use state is resisted by certain initial tension and static friction force between the planar sliding plate and the lower support plate. When the cable anchor is used for sliding the support, the cable in a loose state is anchored in the cable anchoring area, and a certain displacement allowance is reserved so as to ensure that the support can freely slide in a normal use state.
The shock absorption and isolation support with the inhaul cable introduces the design of the buffer unit and the groove-rotating shaft. The snakelike billet adopts mild steel preparation, and its rigidity that can adjust the buffer unit after surging effectively avoids resonating, and it has good hysteresis characteristic after getting into the plastic state moreover, can absorb seismic energy in a large number in the deformation process of plasticity hysteresis. The spring adopts the screw type, connects in parallel with snakelike billet, provides the restoring force. The inhaul cable is connected in series with a parallel system formed by the inhaul cable and the inhaul cable, and the relative displacement of the upper structure and the lower structure is limited. The initial tension of the inhaul cable is adjusted, the sliding requirement of the support can be met, and the use of a shear key between the upper support plate and the lower support plate can be avoided by utilizing larger initial tension. The buffer unit is matched with the spherical plate for plane friction, and has certain self-resetting capability. The design of the groove and the rotating shaft can convert the sliding friction between the inhaul cable and the opening of the slideway into the static friction between the inhaul cable and the rotating shaft, and the early damage of the steel cable caused by the sliding friction between the inhaul cable and the opening of the slideway is avoided.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A shock absorption and isolation support with a guy cable is characterized by comprising an upper support plate, a lower support plate, a spherical plate and a buffer unit; the spherical panel is arranged between the upper support plate and the lower support plate; the upper support plate and the lower support plate are connected through a buffer unit;
the buffer unit comprises a stay cable, a sliding block and a buffer piece; two ends of the buffer part are respectively connected with the two inhaul cables through the sliding blocks;
the buffer unit transversely penetrates through the upper support plate, and two ends of the buffer unit are connected to the lower support plate; or the buffer unit transversely penetrates through the lower support plate, and two ends of the buffer unit are connected to the upper support plate; or a combination of the two.
2. The support with the inhaul cable for seismic mitigation and isolation as claimed in claim 1, wherein the buffer member is a spring and a snake-shaped steel bar which are arranged in parallel, and the snake-shaped steel bar is sleeved in the spring.
3. The seismic mitigation and isolation bearing with the inhaul cable according to claim 1, wherein a plurality of first slideway holes are formed in the upper bearing plate, and the axial direction of each first slideway hole is parallel to the plate surface of the upper bearing plate; two sides of the upper support plate are provided with first grooves for mounting rotating shafts, and the rotating shafts are perpendicular to the first slide way holes; the lower surface of the upper support plate is provided with a concave spherical surface.
4. The seismic mitigation and isolation bearing with the inhaul cable according to claim 1, wherein a plurality of second slideway holes are formed in the lower bearing plate, and the axial direction of each second slideway hole is parallel to the plate surface of the lower bearing plate; and second grooves for mounting rotating shafts are formed in two sides of the lower support plate, and the rotating shafts are perpendicular to the second slide way holes.
5. The support with the inhaul cable for seismic mitigation and isolation as claimed in claim 3 or 4, wherein the rotating shaft comprises a shaft core and a shaft sleeve sleeved on the shaft core, two ends of the shaft core are fixed in the first groove or the second groove, and the shaft sleeve can rotate around the shaft core.
6. The seismic mitigation and isolation bearing with the guy cable according to claim 5, wherein the lower surface of the upper bearing plate is provided with a first guy cable anchoring area for anchoring the guy cable; the upper surface of bottom suspension bedplate is equipped with the second cable anchor district that is used for the anchor cable.
7. The support with the inhaul cable for seismic mitigation and isolation as claimed in claim 3, wherein the spherical plate comprises a spherical sliding plate, a spherical crown lining plate and a planar sliding plate which are sequentially arranged from top to bottom; the spherical sliding plate is matched with the concave spherical surface, and the plane sliding plate can slide on the upper surface of the lower support plate; the spherical sliding plate and the plane sliding plate are both made of polytetrafluoroethylene materials.
8. The seismic mitigation and isolation bearing with the inhaul cable according to claim 2, wherein the inhaul cable is made of high-strength steel wires, and the sliding block and the spring are made of high-strength structural steel, so that the inhaul cable, the sliding block and the spring are in an elastic range in the use process.
9. The seismic mitigation and isolation bearing with the inhaul cable according to claim 2, wherein the snake-shaped steel bar is made of mild steel, and the snake-shaped steel bar can adjust the rigidity of the buffer unit after yielding, so that resonance is effectively avoided.
10. The support with the inhaul cable for seismic mitigation and isolation as claimed in any one of claims 6 to 9, wherein the buffer unit penetrates through a first slideway hole of the upper support plate, and the inhaul cable is anchored to a second inhaul cable anchoring area of the lower support plate by bypassing a rotating shaft on the upper support plate; or the buffer unit penetrates through a second slide way hole of the lower support plate, and the inhaul cable is anchored in the first inhaul cable anchoring area of the upper support plate by bypassing the rotating shaft on the lower support plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922223783.0U CN211596377U (en) | 2019-12-12 | 2019-12-12 | Take subtract isolation bearing of cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922223783.0U CN211596377U (en) | 2019-12-12 | 2019-12-12 | Take subtract isolation bearing of cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211596377U true CN211596377U (en) | 2020-09-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922223783.0U Active CN211596377U (en) | 2019-12-12 | 2019-12-12 | Take subtract isolation bearing of cable |
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| CN (1) | CN211596377U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116254760A (en) * | 2023-05-06 | 2023-06-13 | 菏泽城建工程发展集团有限公司 | Cable shock attenuation spherical support with shear resistance transition steel sheet structure |
-
2019
- 2019-12-12 CN CN201922223783.0U patent/CN211596377U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116254760A (en) * | 2023-05-06 | 2023-06-13 | 菏泽城建工程发展集团有限公司 | Cable shock attenuation spherical support with shear resistance transition steel sheet structure |
| CN116254760B (en) * | 2023-05-06 | 2023-10-31 | 菏泽城建工程发展集团有限公司 | Cable shock attenuation spherical support with shear resistance transition steel sheet structure |
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