CN204282203U - A kind of short steel arm energy dissipating support - Google Patents
A kind of short steel arm energy dissipating support Download PDFInfo
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- CN204282203U CN204282203U CN201420693854.8U CN201420693854U CN204282203U CN 204282203 U CN204282203 U CN 204282203U CN 201420693854 U CN201420693854 U CN 201420693854U CN 204282203 U CN204282203 U CN 204282203U
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- supporting surface
- short steel
- steel arm
- top board
- sliding seat
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Abstract
The utility model provides a kind of short steel arm energy dissipating support, comprises top board, sliding seat and base plate, and wherein top board has the first supporting surface and the second relative supporting surface; Sliding seat has the 3rd supporting surface of arc pit and the 4th relative supporting surface; In arc pit, be placed with sliding ball core, sliding ball core has planar slide face and arc sliding face; Base plate has the 5th supporting surface that contacts with the 4th supporting surface of sliding seat and the 6th supporting surface with point cantact to be fixed; The surrounding that 5th supporting surface of base plate is positioned at sliding seat is fixed with the shaft-like short steel arm extending to top board place, is provided with the container cavity of the termination holding short steel arm in the position that the second supporting surface of top board is corresponding with short steel arm.The flexural deformation of short firm arm of the present utility model and the friction of bottom friction pair, can provide certain equivalent stiffness and equivalent damping ratio, thus play the effect of absorption and dissipation seismic energy.
Description
Technical field
The utility model relates to building field, particularly relates to a kind of for bridge, can move and consume the short steel arm fixed bearing of kinetic energy when bridge moves while bearing bridge load with seismic wave.
Background technology
In bridge engineering, affect by the factor such as variations in temperature or earthquake, horizontal shear and vertical tension will be produced to whole bridge, above-mentioned various power can cause distortion or the displacement of stressed member, very large moment will be produced for some node center, discharge if do not take measures, very large harm will be produced to building structure.
Utility model content
An object of the present utility model to provide a kind of short steel arm energy dissipating support.It possesses enough supporting capacitys, resistance to tension, shear resistance, slip ability and excellent turning power, can improve the security performance of bridge.
The utility model further object be will by reducing or eliminating bridge and moving time the kinetic energy that produces.
Especially, the utility model provides a kind of short steel arm fixed bearing consumed energy, and comprising:
Top board, has and the first supporting surface of point cantact to be supported and the second relative supporting surface;
Sliding seat, has the 3rd supporting surface of arc pit and the 4th relative supporting surface; In described arc pit, be placed with sliding ball core, described sliding ball core has the planar slide face contacted with the second supporting surface of described top board and the arc sliding face contacted with the arc pit on the 3rd supporting surface of described sliding seat;
Base plate, has the 5th supporting surface that contacts with the 4th supporting surface of described sliding seat and the 6th supporting surface with point cantact to be fixed;
Wherein, the surrounding that 5th supporting surface of described base plate is positioned at described sliding seat is fixed with the shaft-like short steel arm extending to top board place, is provided with the container cavity of the termination holding described short steel arm in the position that the second supporting surface of described top board is corresponding with described short steel arm.
Further, between the planar slide face of described sliding ball core and the second supporting surface of described top board, between the arc sliding face of described sliding ball core and the 3rd supporting surface of described sliding seat and between the 4th supporting surface of described sliding seat and the 5th supporting surface of described base plate, the sliding layer improving friction factor is installed.
Further, the diameter of described sliding ball core is less than the diameter of described 3rd supporting surface, and the distance on planar slide face to the summit in arc sliding face of described sliding ball core is greater than the distance of described 3rd supporting surface to the summit of arc pit.
Further, described container cavity is rectangle and the width of its minor axis is identical with the diameter of the termination of described short steel arm.
Further, described container cavity is circular and its diameter is greater than the diameter of the termination of described short steel arm.
Further, the inner side the second supporting surface of described top board being positioned at described container cavity is provided with the first power consumption platform around described sliding seat.
Further, the inner side the 5th supporting surface of described base plate being positioned at described short steel arm is provided with the second power consumption platform around described sliding seat.
Further, described sliding seat is fixed by shear pin and described base plate.
Further, described top board and described base plate have the tensile device preventing described top board and described base plate from mutually departing from level and longitudinal direction in the arranged outside being positioned at described short steel arm.
Steel of the present utility model short steel arm fixed bearing owing to have employed short steel arm configuration between top board and base plate, when being subject to seismic wave and affecting, top board can drive sliding ball core, sliding seat to slide relative to base plate together, and drive the termination of short firm arm to move together by container cavity, because short firm arm roots is fixed on base plate, so short firm arm can occur bending and deformation.Short firm arm is subject to the load perpendicular to its axis during in end, moment of flexure distribution triangular in shape.The short firm arm cross section of design is circular, and its radius is directly proportional to 1/3 power of short firm arm axle line coordinates, can ensure that all cross sections normal stress of short firm arm reaches yield strength so simultaneously, get the hang of.The flexural deformation of short firm arm and the friction of bottom friction pair, certain equivalent stiffness and equivalent damping ratio can be provided, thus change the intrinsic frequency of bridge superstructure, extend the natural vibration period of bridge superstructure, reduce the seismic response of bridge superstructure, effective isolation seismic energy is transmitted, and plays the effect of absorption and dissipation seismic energy.
Further, tensile device of the present utility model when earthquake degree is much larger than design degree, once short firm arm fractures, can ensures the globality of bearing, avoid scattering of whole steel short steel arm fixed bearing at extreme displacement place.
Steel of the present utility model short steel arm fixed bearing, compared with laminated rubber bearing of the prior art, bears vertical load ability more greatly, can bear vertical load 1000KN ~ 60000KN.Large corner 0.01rad ~ 0.05rad can be realized.And sheet-type support only has 25 years service life, and the service life of steel short steel arm fixed bearing is 100 years.Steel short steel arm fixed bearing integral rigidity is large, and ensure that the stationarity of bridge construction, is that neoprene bearing cannot be accomplished.
Compared with conventional ball type bearing, the short firm arm short steel arm fixed bearing of this programme has the feature of girder falling, also has large equivalent damping ratio (can reach 46%) energy dissipation capacity strong.By the perfect combination of three road anti-vibration defense lines and glissando, for bridge provides reliable safety assurance, shear pin, short firm arm can be changed, for the recycling of shaking rear support provides conveniently.
According to hereafter by reference to the accompanying drawings to the detailed description of the utility model specific embodiment, those skilled in the art will understand above-mentioned and other objects, advantage and feature of the present utility model more.
Accompanying drawing explanation
Hereinafter describe specific embodiments more of the present utility model with reference to the accompanying drawings by way of example, and not by way of limitation in detail.Reference numeral identical in accompanying drawing denotes same or similar parts or part.It should be appreciated by those skilled in the art that these accompanying drawings may not be drawn in proportion.In accompanying drawing:
Fig. 1 is the schematic half sectional view of the short steel arm fixed bearing according to the utility model embodiment, and the top of its short-and-medium steel arm is received chamber and limits completely;
Fig. 2 can do the dynamic structural representation of transverse direction or vertical shift in the horizontal plane according to the top of the short-and-medium steel arm of the utility model embodiment;
Fig. 3 is can the structural representation of movement in all directions of horizontal plane according to the top of the short-and-medium steel arm of the utility model embodiment.
Detailed description of the invention
As shown in Figure 1, short steel arm energy dissipating support of the present utility model can comprise the top board 10 had with the first supporting surface 11 of point cantact to be supported and the second relative supporting surface 12 in general manner; With the sliding seat 20 of the 3rd supporting surface 21 with the 4th relative supporting surface 22 with arc pit, can place sliding ball core 40 in the arc pit of this sliding seat 20, this sliding ball core 40 has the planar slide face 41 contacted with the second supporting surface 12 of top board 10 and the arc sliding face 42 contacted with the arc pit on the 3rd supporting surface 21 of sliding seat 20; And there is the base plate 30 of the 5th supporting surface 31 that contacts with the 4th supporting surface 22 of sliding seat 20 and the 6th supporting surface 32 with point cantact to be fixed; Wherein, be positioned at the shaft-like short steel arm 50 being fixed with around sliding seat 20 and extending to top board 10 place at the 5th supporting surface 31 of base plate 30, be provided with the container cavity 13 of the termination holding short steel arm in the position that the second supporting surface 12 of top board 10 is corresponding with short steel arm 50.
Short steel arm fixed bearing of the present utility model is generally integrally mounted the tie point place at bridge superstructure and bridge substructure.It is contacted with bridge superstructure by first supporting surface 11 of top board 10 and is fixed, and to be contacted and fix by the 6th supporting surface 32 of base plate 30 with bridge substructure.When being subject to seismic wave and affecting, top board 10 can drive sliding ball core 40, sliding seat 20 slides relative to base plate 30 together, and drive the termination of short firm arm 50 to move together by container cavity 13, because short firm arm 50 root is fixed on base plate 30, so short firm arm 50 can occur bending and deformation.Short firm arm 50 is subject to the load perpendicular to its axis during in end, moment of flexure distribution triangular in shape.Short firm arm 50 cross section of design is circular, and its radius is directly proportional to 1/3 power of short firm arm 50 axis coordinate, can ensure that all cross sections normal stress of short firm arm 50 reaches yield strength simultaneously and gets the hang of like this.The flexural deformation of short firm arm 50 and the friction of bottom friction pair, certain equivalent stiffness and equivalent damping ratio can be provided, thus change the intrinsic frequency of bridge superstructure, extend the natural vibration period of bridge superstructure, reduce the seismic response of bridge superstructure, effective isolation seismic energy is transmitted, and plays the effect of absorption and dissipation seismic energy.
As shown in Figure 2, in an embodiment of the present utility model, the container cavity 13 on top board 10 can be rectangle and the width of its minor axis is identical with the diameter of the termination 51 of short steel arm 50.Under this structure, the termination 51 of short steel arm 50 can be moved at the long axis direction of container cavity 13 when short steel arm fixed bearing moves, improve short steel arm fixed bearing displacement in the direction in which, the kinetic energy reducing now short steel arm fixed bearing further to utilize displacement and bear.When the distance of top board 10 movement exceedes the length on this container cavity 13 long axis direction, the sidewall of container cavity 13 can contact with the termination 51 of short steel arm 50, thus is absorbed further kinetic energy by the distortion of short steel arm 50.The major axis of concrete container cavity, towards that direction, can be determined according to the movement requirement of concrete bridge, generally with the axis direction of bridge floor or perpendicular to axis direction for standard.
Further, as shown in Figure 3, the container cavity 13 on top board 10 can be greater than the diameter of the termination 51 of short steel arm 50 for circular and its diameter.Short steel arm fixed bearing can realize the movement of the maximum restriction of bridge floor under this structure, and is the movement of any direction in the horizontal plane, and this moves and can first consume a part of kinetic energy.When this move the sidewall of container cavity 13 is contacted with the termination 51 of short steel arm 50 time, short steel arm 50 can utilize the kinetic energy bending and again eliminate short steel arm fixed bearing and bear, thus reduces further the infringement that bridge is subject to.
As shown in Figure 1, for eliminating the kinetic energy that short steel arm fixed bearing bears, in an embodiment of the present utility model, the first power consumption platform 14 of inner side setting around sliding seat 20 of container cavity 13 can be positioned on the second supporting surface 12 of top board 10.When top board relative sliding ball core 40 is when mobile, first this first power consumption platform 14 contacts with sliding seat 20 and is blocked by sliding seat 20, thus consumes a part of kinetic energy.
Further, the second power consumption platform 33 of inner side setting around sliding seat 20 of short steel arm 50 can also be positioned on the 5th supporting surface 31 of base plate 30.After the movement of top board 10 relative sliding ball core 40 is blocked by the first power consumption platform 14, its kinetic energy can continue to promote sliding seat 20 opposed bottom 30 and move, when sliding seat 20 moves to the second power consumption platform 33, second power consumption platform 33 can consume the kinetic energy that a part of short steel arm fixed bearing bears equally, thus alleviates the infringement that bridge is subject to.The utility model progressively can consume by arranging the first power consumption platform 14 and the second power consumption platform 33 kinetic energy that short steel arm fixed bearing bears, and improves the shock resistance of short steel arm fixed bearing further.
In an embodiment of the present utility model, for improving the shock resistance of short steel arm fixed bearing, sliding seat 20 can be fixed by shear pin 70 and base plate 30.This shear pin 70 adopts steel material, utilizes the mode such as screw thread or bolt base plate 30 and sliding seat 20 to be fixed together.Short steel arm fixed bearing is under non-geological process or under geological process, when longitudinal and transverse bridge is all less than a certain design load to horizontal earthquake action, short steel arm fixed bearing is in normal operating condition, and the horizontal force suffered by bridge superstructure can be resisted by the shear pin 70 of the short steel arm fixed bearing horizontal relative displacement of restriction completely.When only exceeding this design load, shear pin 70 is cut off sliding seat 20 and just be there will be displacement, and is limited by other position limiting structure further.Also make top board 10 when relative sliding ball core 40 mobile by the setting of shear pin 70, prevent sliding seat 20 to move simultaneously.
In another embodiment of the present utility model, excessive and cause short steel arm fixed bearing to disperse for preventing short steel arm fixed bearing to be subject to kinetic energy on horizontal stroke, longitudinal direction.The tensile device that the arranged outside that can be positioned at short steel arm 50 on top board 10 and base plate 30 prevents top board 10 and base plate 30 from mutually departing from level and longitudinal direction.This tensile device can be the bolt directly connecting top board 10 and base plate 30, and its one end rear fixed by this bolt can have certain displacement relative to top board 10 or base plate 30, and this displacement is as the criterion with the normal displacement not affecting sliding seat 20.This tensile device can also be the wire rope directly connecting top board 10 and base plate 30, and after fixing, the length of wire rope is as the criterion can prevent top board 10 or base plate 30 relative separation.
In another embodiment of the present utility model, for the sliding effect between the contact surface that each parts improving short steel arm fixed bearing contact with each other, between the planar slide face 41 of sliding ball core 40 and the second supporting surface 12 of top board 10, between the arc sliding face 41 of sliding ball core 40 and the 3rd supporting surface 21 of sliding seat 20 and between the 4th supporting surface 22 of sliding seat 20 and the 5th supporting surface 31 of base plate 30, the sliding layer 60 reducing friction factor can be installed.This sliding layer 60 can be made up of the corrosion resistant plate contacted with each other and/or tetrafluoro plate.In this programme, corrosion resistant plate is arranged on top board 10 and base plate 30 side, and tetrafluoro plate is arranged on sliding ball core and sliding seat side.In order to enable tetrafluoro plate be stabilized on installed surface, can arrange on corresponding installed surface and groove being installed to place tetrafluoro plate.It should be noted that the tetrafluoro plate after installation has at least a part to need to expose outside this groove, to contact with corrosion resistant plate.
Further, for improving sliding effect, the area of sliding layer 60 can be less than the contact area of its two isolated contact surfaces.
As shown in Figure 1, in another embodiment of the present utility model, for making top board 10 relative sliding seat 20 have larger mobile space, the diameter of this sliding ball core 40 can be less than the diameter of the 3rd supporting surface 21.Further, the distance on the summit in 41 to the arc sliding face, planar slide face 42 of this sliding ball core 40 can be greater than the distance on the 3rd supporting surface 21 surface to the summit of its arc pit.Such structure can make the planar slide face 41 of the sliding ball core 40 be placed in arc pit protrude from the 3rd supporting surface 21, to push up from sliding seat 20 by top board 10, improves the sliding effect of top board 10.
So far, those skilled in the art will recognize that, although multiple exemplary embodiment of the present utility model is illustrate and described herein detailed, but, when not departing from the utility model spirit and scope, still can directly determine or derive other modification many or amendment of meeting the utility model principle according to content disclosed in the utility model.Therefore, scope of the present utility model should be understood and regard as and cover all these other modification or amendments.
Claims (9)
1. a short steel arm energy dissipating support, is characterized in that comprising:
Top board, has and the first supporting surface of point cantact to be supported and the second relative supporting surface;
Sliding seat, has the 3rd supporting surface of arc pit and the 4th relative supporting surface; In described arc pit, be placed with sliding ball core, described sliding ball core has the planar slide face contacted with the second supporting surface of described top board and the arc sliding face contacted with the arc pit on the 3rd supporting surface of described sliding seat;
Base plate, has the 5th supporting surface that contacts with the 4th supporting surface of described sliding seat and the 6th supporting surface with point cantact to be fixed;
Wherein, the surrounding that 5th supporting surface of described base plate is positioned at described sliding seat is fixed with the shaft-like short steel arm extending to top board place, is provided with the container cavity of the termination holding described short steel arm in the position that the second supporting surface of described top board is corresponding with described short steel arm.
2. short steel arm energy dissipating support as claimed in claim 1, is characterized in that,
Between the planar slide face of described sliding ball core and the second supporting surface of described top board, between the arc sliding face of described sliding ball core and the 3rd supporting surface of described sliding seat and between the 4th supporting surface of described sliding seat and the 5th supporting surface of described base plate, the sliding layer improving friction factor is installed.
3. short steel arm energy dissipating support as claimed in claim 1, is characterized in that,
The diameter of described sliding ball core is less than the diameter of described 3rd supporting surface, and the distance on planar slide face to the summit in arc sliding face of described sliding ball core is greater than the distance of described 3rd supporting surface to the summit of arc pit.
4. short steel arm energy dissipating support as claimed in claim 1, is characterized in that,
Described container cavity is rectangle and the width of its minor axis is identical with the diameter of the termination of described short steel arm.
5. short steel arm energy dissipating support as claimed in claim 1, is characterized in that,
Described container cavity is circular and its diameter is greater than the diameter of the termination of described short steel arm.
6. short steel arm energy dissipating support as claimed in claim 1, is characterized in that,
The inner side second supporting surface of described top board being positioned at described container cavity is provided with the first power consumption platform around described sliding seat.
7. short steel arm energy dissipating support as claimed in claim 1, is characterized in that,
The inner side 5th supporting surface of described base plate being positioned at described short steel arm is provided with the second power consumption platform around described sliding seat.
8. short steel arm energy dissipating support as claimed in claim 1, is characterized in that,
Described sliding seat is fixed by shear pin and described base plate.
9. short steel arm energy dissipating support as claimed in claim 1, is characterized in that,
Described top board and described base plate have the tensile device preventing described top board and described base plate from mutually departing from level and longitudinal direction in the arranged outside being positioned at described short steel arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420693854.8U CN204282203U (en) | 2014-11-09 | 2014-11-09 | A kind of short steel arm energy dissipating support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420693854.8U CN204282203U (en) | 2014-11-09 | 2014-11-09 | A kind of short steel arm energy dissipating support |
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| CN204282203U true CN204282203U (en) | 2015-04-22 |
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| CN201420693854.8U Expired - Fee Related CN204282203U (en) | 2014-11-09 | 2014-11-09 | A kind of short steel arm energy dissipating support |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105113656A (en) * | 2015-09-16 | 2015-12-02 | 北京市建筑设计研究院有限公司 | Universal horizontal elastic support |
| CN105178173A (en) * | 2015-07-02 | 2015-12-23 | 河北航科工程检测设备技术有限公司 | Movable support with seismic isolation and reduction functions |
-
2014
- 2014-11-09 CN CN201420693854.8U patent/CN204282203U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105178173A (en) * | 2015-07-02 | 2015-12-23 | 河北航科工程检测设备技术有限公司 | Movable support with seismic isolation and reduction functions |
| CN105113656A (en) * | 2015-09-16 | 2015-12-02 | 北京市建筑设计研究院有限公司 | Universal horizontal elastic support |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20171109 |