CN114354111A - Vehicle-bridge coupling vibration test structure - Google Patents
Vehicle-bridge coupling vibration test structure Download PDFInfo
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- CN114354111A CN114354111A CN202210013532.3A CN202210013532A CN114354111A CN 114354111 A CN114354111 A CN 114354111A CN 202210013532 A CN202210013532 A CN 202210013532A CN 114354111 A CN114354111 A CN 114354111A
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Abstract
The invention discloses a vehicle-bridge coupling vibration test structure which comprises two test sections and two lead sections, wherein the two test sections and the two lead sections are manufactured according to a preset scale ratio, the two test sections are arranged in parallel, two ends of one lead section are respectively butted with one ends of the two test sections, and two ends of the other lead section are respectively butted with the other ends of the two test sections; the experimental section comprises a bridge, a telescopic supporting structure, an adjustable support, a pressure testing device and a connecting plate, wherein the pressure testing device is in contact with the bottom surface of the bridge, the connecting plate is connected with the bottom surface of the pressure testing device, the top of the adjustable support is connected with the bottom surface of the connecting plate, the bottom of the adjustable support is in contact with the top of the telescopic supporting structure, and the bottom of the telescopic supporting structure is fixed. The invention has high test precision and convenient and economic test.
Description
Technical Field
The invention relates to the technical field of bridges, in particular to a vehicle-bridge coupling vibration testing structure.
Background
The vehicle is one of the main live loads borne by a highway bridge, and a coupled vibration system is formed between the vehicle and the bridge when the vehicle passes through the bridge. The power action makes the bridge generate vibration inevitably, and has profound influence on the safety of the bridge. At present, a numerical simulation method is adopted to test the vehicle-bridge coupling vibration effect of different bridge types, but the precision of the numerical simulation is difficult to verify. The vehicle-bridge coupling vibration effect is also tested through a real bridge experiment, but a large amount of manpower and material resources are required to be invested. Therefore, a vehicle-bridge coupling vibration testing structure with high testing precision, convenient testing and economy is needed.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a vehicle-bridge coupling vibration test structure which is high in test precision, convenient and economical to test.
In order to solve the technical problems, the invention is realized by the following technical scheme:
a vehicle-bridge coupling vibration test structure comprises two test sections and two lead sections, wherein the two test sections are manufactured according to a preset scale ratio, the two test sections are arranged in parallel, two ends of one lead section are respectively butted with one ends of the two test sections, and two ends of the other lead section are respectively butted with the other ends of the two test sections; the experimental section comprises a bridge, a telescopic supporting structure, an adjustable support, a pressure testing device and a connecting plate, wherein the pressure testing device is in contact with the bottom surface of the bridge, the connecting plate is connected with the bottom surface of the pressure testing device, the top of the adjustable support is connected with the bottom surface of the connecting plate, the bottom of the adjustable support is in contact with the top of the telescopic supporting structure, and the bottom of the telescopic supporting structure is fixed.
Further, scalable bearing structure is including fixed pipe, flexible pipe, first backup pad, second backup pad and jack, fixed socle portion is fixed, adjacent two fixed pipe passes through first backup pad is connected, the lower extreme activity of flexible pipe sets up in the fixed pipe, adjacent two flexible pipe passes through the second backup pad is connected, adjustable support's bottom with the top contact of second backup pad, adjacent two set up one between the flexible pipe the jack, the bottom of jack is fixed on the first backup pad, the top is fixed in the second backup pad.
Further, the test section also comprises a bottom plate, the bottom plate is fixed, and the bottom of the telescopic supporting structure is fixed on the bottom plate.
Further, adjustable support includes screw rod and nut, the bottom of screw rod is connected scalable bearing structure's top, nut screw-thread fit is in on the nut, the top of nut with the bottom surface of connecting plate is connected.
Further, a cushion pad is arranged between the pressure testing device and the connecting plate.
Further, the connection section comprises a connection panel and a support piece, the bottom of the support piece is fixed, and the top of the support piece is connected to the bottom of the connection panel.
Furthermore, anti-collision limiting devices are arranged on the two sides of the bridge and the guide panel.
Furthermore, a plurality of lanes are arranged on the bridge and the guide panel.
Furthermore, sand is spread on the bridge and the guide panel.
Further, the bridges of the two test sections comprise any combination of box girder bridges, hollow slab bridges, T-beam bridges or arch bridges.
Compared with the prior art, the invention has at least the following beneficial effects: according to the vehicle-bridge coupling vibration testing structure provided by the invention, two testing sections and two leading sections are manufactured according to a preset scale ratio, a closed-loop lane is formed by the two testing sections and the two leading sections, the longitudinal slope of the bridge can be adjusted by controlling the telescopic height of the telescopic supporting structure, and the transverse slope of the bridge can be adjusted by controlling the height of the adjustable support. During the test, the test vehicle is placed on the lane in which the two test sections and the two lead sections form a closed loop, after corresponding balance weights are applied to the test vehicle according to test requirements, the test vehicle is controlled to move along the closed loop lane, the pressure test device is used for measuring the change of the support reaction force, and then the coupling vibration between the vehicle and the bridge can be tested and analyzed. Compared with the traditional method for testing the vehicle-bridge coupling vibration effect on different bridge types by using a numerical simulation method, the method has the advantages of higher test precision, convenience in test and good economical efficiency.
Furthermore, the telescopic pipe is controlled to stretch by the jack, so that the height of the bridge is controlled, the longitudinal slope of the bridge can be conveniently adjusted, the structure is simple, and the cost is low.
Furthermore, the bottom of the telescopic supporting structure is fixed on the bottom plate, and the bottom plate is fixed on the ground, so that the structure is more reliable.
Furthermore, the adjustable support comprises a screw and a nut, the bottom of the screw is connected to the top of the telescopic supporting structure, the nut is in threaded fit with the nut, the top of the nut is connected with the bottom surface of the connecting plate, the bridge cross slope is adjusted by rotating the nut, and the adjustable support is simple in structure, good in adjusting precision and low in cost.
Further, still be provided with the blotter between pressure test device and connecting plate, play the cushioning effect, be favorable to improving overall structure's stability.
Furthermore, anti-collision limiting devices are arranged on the two sides of the bridge and the connecting and leading panel, and the test vehicle is prevented from falling.
Furthermore, a plurality of lanes are arranged on the bridge and the access panel, so that closed-loop loading of a plurality of test vehicles can be realized.
Furthermore, sand is spread on the bridge and the connecting panel, so that the roughness of the driveway is improved.
Furthermore, the bridges of the two test sections comprise any combination of box girder bridges, hollow slab bridges, T-beam bridges or arch bridges, and the vehicle-bridge coupling vibration test analysis of two different types of bridges can be synchronously realized.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a general schematic view of a vehicle-axle coupled vibration test structure according to the present invention;
FIG. 2 is a schematic diagram of a test section in a vehicle-axle coupled vibration test structure according to the present invention;
FIG. 3 is a schematic exploded view of a telescoping support structure for a test section of a vehicle-axle coupled vibration test structure according to the present invention;
FIG. 4 is a schematic view of an adjustable support of a test section in a vehicle-axle coupled vibration test structure according to the present invention;
fig. 5 is a schematic diagram of a lead section in a vehicle-bridge coupling vibration test structure according to the present invention.
In the figure: 1-test section; 10-a bridge; 11-a telescopic support structure; 110-a stationary tube; 111-telescoping tubes; 112-a first support plate; 113-a second support plate; 114-a jack; 12-an adjustable support; 120-screw rod; 121-a nut; 13-a pressure testing device; 14-a connecting plate; 15-a buffer pad; 16-a base plate; 2-a connecting section; 20-a leader panel; 21-a support; 3-anti-collision limiting device; 4-test vehicle.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As a specific embodiment of the present invention, as shown in fig. 1, a vehicle-bridge coupling vibration test structure includes two test sections 1 and two lead sections 2 manufactured according to a preset scale ratio, the two test sections 1 are arranged in parallel, the two lead sections 2 are curved runways, two ends of one lead section 2 are respectively butted with one ends of the two test sections 1, and two ends of the other lead section 2 are respectively butted with the other ends of the two test sections 1. In other words, one end of one of the two lead connecting sections 2 is butted with one end of one test section 1, and the other end is butted with one end of the other test section 1; one end of the other connecting and leading section 2 is in butt joint with the other end of one test section 1, and the other end of the other connecting and leading section is in butt joint with the other end of the other test section 1. That is to say, two test sections 1 and two leading sections 2 form a closed-loop lane, and the bridge surfaces of the test sections 1 and the leading sections 2 are flush.
Specifically, referring to fig. 1, 2, 3 and 4, the test segment 1 includes a bridge 10, a telescopic supporting structure 11, an adjustable support 12, a pressure testing device 13 and a connecting plate 14, wherein the pressure testing device 13 is in contact with the bottom surface of the bridge 10, the connecting plate 14 is connected to the bottom surface of the pressure testing device 13, and preferably, a cushion pad 15 is further disposed between the pressure testing device 13 and the connecting plate 14, in this embodiment, the cushion pad 15 is a rubber pad, and the cushion pad 15 is connected to the connecting plate 14 and the pressure testing device 13 by bonding. The top of the adjustable support 12 is connected to the bottom of the connecting plate 14, the bottom of the adjustable support 12 is connected to the top of the telescopic support 11, the bottom of the telescopic support 11 is fixed, preferably, a bottom plate 16 is fixed on the ground, and the bottom of the telescopic support 11 is fixed on the bottom plate 16.
In a preferred embodiment, a plurality of lanes are arranged on the bridge 10, so that closed-loop loading of a plurality of test vehicles 4 can be realized. Sand may be spread on the bridge 10 and the access panels 20 to selectively simulate road roughness. The bridges 10 of the two test sections 1 comprise any combination of a box girder bridge, a hollow slab bridge, a T-girder bridge or an arch bridge, that is, the bridge 10 of one test section 1 can be in any form of the box girder bridge, the hollow slab bridge, the T-girder bridge or the arch bridge, the bridge 10 of the other test section 1 can also be in any form of the box girder bridge, the hollow slab bridge, the T-girder bridge or the arch bridge, the bridges 10 of the two test sections 1 can form bridges of different types, and vehicle-bridge coupling vibration test analysis of the two bridges of different types can be synchronously realized. In the present invention, the bridge 10 can be made of different materials, such as organic glass, steel, aluminum alloy, etc.
Preferably, the telescopic support structure 11 and the adjustable support 12 are removable and movable, so that the span number and the span of the bridge can be conveniently adjusted.
Referring to fig. 2 and 3, the telescopic supporting structure 11 includes a fixed pipe 110, a telescopic pipe 111, a first supporting plate 112, a second supporting plate 113, and a jack 114, specifically, the bottom of the fixed pipe 110 is fixed on the bottom plate 16, and in this embodiment, the bottom of the fixed pipe 110 is fixed on the bottom plate 16 by welding. Two adjacent fixed tubes 110 are connected by a first support plate 112, and in this embodiment, the first support plate 112 and the fixed tubes 110 are connected by welding. The lower ends of the telescopic pipes 111 are movably arranged in the fixed pipe 110, two adjacent telescopic pipes 111 are connected through a second support plate 113, in this embodiment, the second support plate 113 is connected with the telescopic pipes 111 in a welding manner. The bottom of the adjustable support 12 is in contact with the top of the second support plate 113, a jack 114 is arranged between two adjacent telescopic pipes 111, the bottom of the jack 114 is fixed on the first support plate 112, and the top is fixed on the second support plate 113. That is, the height of the bridge 10 is controlled by controlling the expansion and contraction of the telescopic pipes 111 through the lifting and lowering of the jacks 114, so that the longitudinal slope of the bridge can be effectively simulated.
In this embodiment, the bottom plate 16 is a metal plate with bolt holes, and can be connected to the ground by bolts. The fixed pipe 110 and the telescopic pipe 111 are metal square pipes, and the diameter of the fixed pipe 110 is larger than that of the telescopic pipe 111 so that the telescopic pipe 111 can be inserted into the fixed pipe 110.
Referring to fig. 2, 3 and 4, the adjustable support 12 includes a screw 120 and a nut 121, specifically, the bottom of the screw 120 is connected to the top of the second support plate 113, the nut 121 is screwed on the nut 121, the top of the nut 121 is connected to the bottom of the connecting plate 14, and in this embodiment, the top of the nut 121 is connected to the bottom of the connecting plate 14 by welding. That is, the height of the bridge can be adjusted by rotating the nut 121, thereby facilitating the adjustment of the cross slope of the bridge.
As shown in fig. 1 and 5, the connecting section 2 includes a connecting panel 20 and a support 21, specifically, the bottom of the support 21 is fixed on the ground, and the top of the support 21 is connected to the bottom of the connecting panel 20. In this embodiment, the guiding panel 20 is a metal panel, the supporting member 21 is a frame-shaped member made of a metal material, and the supporting member 21 can be removed and moved. Preferably, the connecting panel 20 is provided with the same number of lanes as the number of lanes on the bridge 10, and sand is also spread on the connecting panel 20.
As a preferred embodiment, as shown in fig. 1, 2 and 5, the bump stoppers 3 are mounted on both sides of the bridge 10 of the test section 1 and the lead panel 20 of the lead section 2. In the invention, the anti-collision limiting device 3 can be made of different materials, such as plastic, organic glass, steel and the like.
In the invention, the test vehicle 4 is a remote control test vehicle, the types of the test vehicles can be various, the weight of the vehicle can be adjusted by adding counterweights with different weights, and the speed and the running track of the vehicle can be controlled by a remote control device or a program.
When the test device is used, the test vehicle 4 is placed on the test section 1 according to the test requirement, after the balance weight of the test vehicle 4 is allocated, the test vehicle 4 is controlled to run along a closed-loop lane formed by the test section 1 and the connecting section 2, the real-time support reaction force change is obtained through the pressure test device 13, and then the test analysis is carried out on the coupling vibration between the vehicle and the bridge.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The vehicle-bridge coupling vibration testing structure is characterized by comprising two test sections (1) and two lead sections (2) which are manufactured according to a preset scale ratio, wherein the two test sections (1) are arranged in parallel, two ends of one lead section (2) are respectively in butt joint with one ends of the two test sections (1), and two ends of the other lead section (2) are respectively in butt joint with the other ends of the two test sections (1); test section (1) includes bridge (10), scalable bearing structure (11), adjustable support (12), pressure test device (13) and connecting plate (14), pressure test device (13) with the bottom surface contact of bridge (10), connecting plate (14) are connected the bottom surface of pressure test device (13), the top of adjustable support (12) with the bottom surface of connecting plate (14) is connected, the bottom of adjustable support (12) with the top contact of scalable bearing structure (11), the bottom of scalable bearing structure (11) is fixed.
2. The vehicle-bridge coupling vibration testing structure according to claim 1, wherein the telescopic supporting structure (11) comprises a fixed pipe (110), a telescopic pipe (111), a first supporting plate (112), a second supporting plate (113) and a jack (114), the fixed pipe (110) is fixed at the bottom, two adjacent fixed pipes (110) are connected through the first supporting plate (112), the lower end of the telescopic pipe (111) is movably arranged in the fixed pipe (110), two adjacent telescopic pipes (111) are connected through the second supporting plate (113), the bottom of the adjustable support (12) is in contact with the top of the second supporting plate (113), one jack (114) is arranged between two adjacent telescopic pipes (111), and the bottom of the jack (114) is fixed on the first supporting plate (112), the top part is fixed on the second supporting plate (113).
3. A vehicle-bridge coupled vibration test structure according to claim 2, wherein said test section (1) further comprises a base plate (16), said base plate (16) being fixed, and the bottom of said telescopic support structure (11) being fixed on said base plate (16).
4. A vehicle-bridge coupled vibration test structure according to claim 1, wherein said adjustable support (12) comprises a screw (120) and a nut (121), the bottom of said screw (120) is connected to the top of said telescopic supporting structure (11), said nut (121) is screw-fitted on said nut (121), and the top of said nut (121) is connected to the bottom surface of said connecting plate (14).
5. A vehicle-bridge coupled vibration testing structure according to claim 1, characterized in that a cushion pad (15) is further arranged between the pressure testing device (13) and the connecting plate (14).
6. A vehicle-bridge coupled vibration test structure according to claim 1, wherein the lead segment (2) comprises a lead panel (20) and a support member (21), the bottom of the support member (21) is fixed, and the top of the support member (21) is connected to the bottom of the lead panel (20).
7. A vehicle-bridge coupling vibration test structure according to claim 6, characterized in that the bridge (10) and the lead panel (20) are provided with anti-collision limiting devices (3) on both sides.
8. A vehicle-bridge coupled vibration test structure according to claim 6, characterized in that a plurality of driveways are provided on the bridge (10) and the access panel (20).
9. A vehicle-bridge coupled vibration test structure according to claim 8, wherein said bridge beam (10) and said access panel (20) are sand-coated.
10. A vehicle-bridge coupled vibration test structure according to claim 1, wherein the bridges (10) of two test sections (1) comprise any combination of box girder bridges, hollow slab bridges, T-beam bridges or arch bridges.
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| CN202210013532.3A CN114354111A (en) | 2022-01-06 | 2022-01-06 | Vehicle-bridge coupling vibration test structure |
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| Title |
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| 谢青;韩万水;刘修平;陈笑;刘焕举;: "基于模型修正的实体车-桥耦合分析系统建立及验证" * |
| 邓露;段林利;何维;冀伟;: "中国公路车-桥耦合振动车辆模型研究" * |
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