CN203270440U - Two-degree of freedom energy-absorbing anti-falling-beam device - Google Patents
Two-degree of freedom energy-absorbing anti-falling-beam device Download PDFInfo
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- CN203270440U CN203270440U CN 201320318872 CN201320318872U CN203270440U CN 203270440 U CN203270440 U CN 203270440U CN 201320318872 CN201320318872 CN 201320318872 CN 201320318872 U CN201320318872 U CN 201320318872U CN 203270440 U CN203270440 U CN 203270440U
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- steel pipe
- absorption type
- falling
- type anti
- freedom energy
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Abstract
The utility model discloses a two-degree of freedom energy-absorbing anti-falling-beam device. The two-degree of freedom energy-absorbing anti-falling-beam device comprises a base fixed on a pier or on a bent cap and a force-deformation member. The force-deformation member comprises a circular steel pipe. A plastic area M is formed by opening holes disposed at specific positions of the steel pipe. The anti-falling-beam device is simple in construction and is convenient in machining and manufacture. The plastic area is formed by the opening holes, and states of the plastic area can be divided into an elastic state, a plastic area and a damaged state with a clear stress mode. The circular cross-section steel pipe is adopted by the force-deformation member with the cross-section being symmetric in all directions, and bidirectional stress is achieved. According to layout forms and shapes of the opening holes, a reasonable stress state can be determined. Additionally, a buffer cushion is arranged on a frange plate close to the side of a main beam so that an impact force is reduced and is fixed on the pier or on the bent cap by a high-strength bolt so that the buffer cushion is convenient in installation and replacement. The anti-falling-beam device adopts ordinary bridges made of steel without any specific requirement of material and welding and the cost is low.
Description
Technical field
The utility model relates to a kind of anticollision device, collision-prevention device of double freedom bridge, particularly a kind of energy-absorption type circular cross-section girder steel anti-fall girder apparatus.
Background technology
Can not ignore the impact of earthquake in bridge design, particularly going its geological process in high earthquake intensity has been the major control effect.At present, the main seismic measures of large span bridge has the methods such as the damper of installation and vibration absorption and isolation support, and the small bridge seismic measures arranges the methods such as anti-fall girder apparatus and plastic hinge.The bridge anti-fall girder apparatus can be divided into block form and the form that is connected according to arrangement form.The block form can be divided into concrete block and steel block, and connected form can be divided into wire rope and connect and steel structure connection.Can be divided into energy-absorption type and non-energy-absorption type according to the anti-fall girder apparatus operating principle again.
At present, domestic small bridge seismic measures mainly block to be set as main, is not also established the method for designing of its structure, and it is subjected to force mode is non-energy-absorption type, and its effect is limited when earthquake.And, also exist to change inconvenience, structure relative complex, the plastic strain position is uncertain, destruction mode is indefinite, can only single load bearing etc. shortcoming.Damper and vibration absorption and isolation support are expensive, and the small bridge One's name is legion is difficult to large-scale application.
For above-mentioned deficiency, need that design and development goes out that convenient, the stressed and failure mode of a kind of simple structure, installation and replacing is clear and definite, convenient processing and manufacture, bridge anti-fall girder apparatus that cost is low, large-scale promotion application is in small bridge.
The utility model content
In view of this, the purpose of this utility model be to provide that convenient, the stressed and failure mode of a kind of simple structure, installation and replacing is clear and definite, convenient processing and manufacture, double freedom energy-absorption type anti-fall girder apparatus that cost is low.
The purpose of this utility model is achieved through the following technical solutions: a kind of double freedom energy-absorption type anti-fall girder apparatus comprises the base that is fixed on bridge pier or bent cap and the stress deformation member that is arranged on base; Described stress deformation member is comprised of round steel pipe, and the round steel pipe sidewall arranges perforate and forms plastic region M.
Further, described perforate all is arranged on same level.
Further, the thickness of steel pipe of described plastic region is less than the wall thickness of other positions.
Further, described perforate is multilayer and vertically is arranged on the horizontal plane of differing heights.
Further, described near cushion pad minimizing impact force is set on the steel pipe walls of girder one side.
Further, described steel pipe adopts common bridge steel plate manufacturing.
Further, described base is fixed on bridge pier or bent cap removably by bolt.
The beneficial effects of the utility model are: double freedom energy-absorption type anti-fall girder apparatus of the present utility model comprises the base that is fixed on bridge pier or bent cap and the stress deformation member that is arranged on base; Described stress deformation member is comprised of round steel pipe, and the round steel pipe sidewall arranges perforate and forms plastic region M.This anti-fall girder apparatus simple structure is convenient to processing and manufacturing; The stress deformation member has adopted the circular cross-section steel pipe, and bidirectional stress has been realized respectively to symmetry in the cross section; Form plastic region in the perforate of round steel pipe ad-hoc location, can I large according to external force be divided into elastic stage, plastic state, collapse state, be subjected to force mode clear and definite; Opening area hour is in unidirectional state when seismic forces, and seismic forces becomes gradually that when reaching certain value greatly, plastic strain absorbs energy, destroyed protection bridge pier during the power value of overstepping the extreme limit.And can be according to arrangement form and the shape in hole, the drag of change structure; In addition, near girder one side, cushion pad being set, can reduce impact force; Be fixed on bridge pier or bent cap with high-strength bolt, it is convenient to install and change; This anti-fall girder apparatus material can adopt common bridge steel plate manufacturing, to material and the welding without any specific (special) requirements, can realize low cost.
That this device is compared with existing various anti-fall girder apparatus is practical, stress is clear and definite, failure mode is clear and definite, simple in structure, install change convenient, processing and manufacturing is simple, greatly reduce the cost of anti-fall girder apparatus, can be in large-scale application in small bridge.
Description of drawings
Below in conjunction with drawings and Examples, the utility model is further described.
Fig. 1 is the structural representation of anti-fall girder apparatus described in the utility model;
Fig. 2 is the top view of Fig. 1.
The specific embodiment
Below with reference to accompanying drawing, the utility model is elaborated, as shown in the figure: the double freedom energy-absorption type anti-fall girder apparatus of the present embodiment comprises the base 2 that is fixed on bridge pier or bent cap 1 and the stress deformation member that is arranged on base; Described stress deformation member is comprised of round steel pipe 3, and round steel pipe 3 sidewalls arrange perforate 4 and form plastic region M.Concrete, described perforate 4 all is arranged on same level, and is stressed even; The thickness of steel pipe of plastic region is less than the wall thickness of other positions, and distortion is easy, and buffering and energy-absorbing effect are obvious.When external force hour its opening area M belong to elastic stage, when external force becomes large gradually, plastic strain absorbs energy and reduces bridge pier internal force, the destroyed protection bridge pier in plastic zone during the external force value of overstepping the extreme limit.Simultaneously, primary structure member has adopted round steel pipe, but bidirectional stress.In the present embodiment, described total can adopt the manufacturing of common bridge steel plate material, and unmatchful material, welding, corrosion-resistant special requirement have reduced cost.
As to further improvement in the technical proposal, described perforate 4 is for multilayer and vertically be arranged on the horizontal plane of differing heights.Perforated is set to increase the area of plastic region M, to absorb more ability, crashproof effect is more obvious.
As to further improvement in the technical proposal, on the described close steel pipe walls of girder one side, cushion pad 5 is set.The buffering such as rubber cushion blocks block is set between anti-fall girder apparatus and bridge, can alleviates impact force, and can be fixed on bridge pier or bent cap is easy for installation, detachable replacing by high-strength bolt.
Explanation is at last, although with reference to preferred embodiment, the utility model is had been described in detail, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical solution of the utility model, and not breaking away from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of claim scope of the present utility model.
Claims (7)
1. double freedom energy-absorption type anti-fall girder apparatus is characterized in that: comprise being fixed on the base (2) on bridge pier or bent cap (1) and being arranged on stress deformation member on base; Described stress deformation member is comprised of round steel pipe (3), and round steel pipe (3) sidewall arranges perforate (4) and forms plastic region (M).
2. double freedom energy-absorption type anti-fall girder apparatus according to claim 1, it is characterized in that: described perforate (4) all is arranged on same level.
3. double freedom energy-absorption type anti-fall girder apparatus according to claim 2, it is characterized in that: the thickness of steel pipe of described plastic region is less than the wall thickness of other positions.
4. double freedom energy-absorption type anti-fall girder apparatus according to claim 2 is characterized in that: described perforate (4) is for multilayer and vertically be arranged on the horizontal plane of differing heights.
5. double freedom energy-absorption type anti-fall girder apparatus according to claim 1 and 2, is characterized in that: described near cushion pad (5) minimizing impact force is set on the steel pipe walls of girder one side.
6. double freedom energy-absorption type anti-fall girder apparatus according to claim 1 and 2, is characterized in that: the common bridge steel plate manufacturing of described steel pipe employing.
7. double freedom energy-absorption type anti-fall girder apparatus according to claim 1, it is characterized in that: described base (2) is fixed on bridge pier or bent cap (1) removably by bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320318872 CN203270440U (en) | 2013-06-04 | 2013-06-04 | Two-degree of freedom energy-absorbing anti-falling-beam device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320318872 CN203270440U (en) | 2013-06-04 | 2013-06-04 | Two-degree of freedom energy-absorbing anti-falling-beam device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203270440U true CN203270440U (en) | 2013-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320318872 Withdrawn - After Issue CN203270440U (en) | 2013-06-04 | 2013-06-04 | Two-degree of freedom energy-absorbing anti-falling-beam device |
Country Status (1)
| Country | Link |
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| CN (1) | CN203270440U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103255706A (en) * | 2013-06-04 | 2013-08-21 | 招商局重庆交通科研设计院有限公司 | Double-freedom-degree energy absorption type girder-falling-resisting device |
-
2013
- 2013-06-04 CN CN 201320318872 patent/CN203270440U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103255706A (en) * | 2013-06-04 | 2013-08-21 | 招商局重庆交通科研设计院有限公司 | Double-freedom-degree energy absorption type girder-falling-resisting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131106 Effective date of abandoning: 20150506 |
|
| RGAV | Abandon patent right to avoid regrant |