CN114354111A - Vehicle-bridge coupling vibration test structure - Google Patents

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

A Vehicle-Axle Coupling Vibration Test Structure

technical field

The invention relates to the technical field of bridges, in particular to a vehicle-bridge coupled vibration test structure.

Background technique

Vehicles are one of the main live loads that highway bridges bear. When vehicles pass through bridges, a coupled vibration system is formed between vehicles and bridges. This dynamic action makes the bridge inevitably vibrate, which has a profound impact on the safety of the bridge. At present, more numerical simulation methods are used to test the vehicle-bridge coupled vibration effect on different bridge types, but the accuracy of numerical simulation is difficult to verify. There is also a real bridge experiment to test the vehicle-bridge coupled vibration effect, but it requires a lot of manpower and material resources. Therefore, there is an urgent need for a vehicle-axle coupled vibration test structure with high test accuracy, convenient and economical test.

SUMMARY OF THE INVENTION

Aiming at the problems existing in the prior art, the present invention provides a vehicle-axle coupling vibration test structure with high test accuracy, convenient and economical test.

In order to solve the above-mentioned technical problems, the present invention is realized through the following technical solutions:

A vehicle-bridge coupled vibration test structure, comprising two test sections and two lead sections made according to a preset scale ratio, wherein the two test sections are arranged in parallel, and two ends of one of the lead sections are arranged in parallel. They are respectively butted with one end of the two test sections, and the two ends of the other connecting section are respectively butted with the other ends of the two test sections; the test sections include a bridge, a telescopic support structure, an adjustable support A seat, a pressure test device and a connecting plate, the pressure testing device is in contact with the bottom surface of the bridge, the connecting plate is connected to the bottom surface of the pressure testing device, and the top of the adjustable support is in contact with the bottom surface of the connecting plate. The bottom surface is connected, the bottom of the adjustable support is in contact with the top of the telescopic support structure, and the bottom of the telescopic support structure is fixed.

Further, the telescopic support structure includes a fixed pipe, a telescopic pipe, a first support plate, a second support plate and a jack, the bottom of the fixed pipe is fixed, and two adjacent fixed pipes pass through the first support plate The lower end of the telescopic tube is movably arranged in the fixed tube, two adjacent telescopic tubes are connected through the second support plate, the bottom of the adjustable support and the top of the second support plate contact, a jack is arranged between two adjacent telescopic tubes, the bottom of the jack is fixed on the first support plate, and the top is fixed on the second support plate.

Further, the test section further includes a bottom plate, the bottom plate is fixed, and the bottom of the retractable support structure is fixed on the bottom plate.

Further, the adjustable support includes a screw rod and a nut, the bottom of the screw rod is connected to the top of the retractable support structure, the nut is threadedly fitted on the nut, and the top of the nut is connected to the The bottom side of the board is connected.

Further, a buffer pad is also arranged between the pressure testing device and the connecting plate.

Further, the connecting section includes a connecting panel and a support, the bottom of the support is fixed, and the top of the support is connected to the bottom of the connecting panel.

Further, both sides of the bridge and the connecting panel are provided with anti-collision limiting devices.

Further, a plurality of lanes are arranged on the bridge and the connecting panel.

Further, sand is spread on the bridge and the access panel.

Further, the bridges of the two test sections include any combination of box girder bridges, hollow slab bridges, T-beam bridges or arch bridges.

Compared with the prior art, the present invention has at least the following beneficial effects: a vehicle-axle coupling vibration test structure provided by the present invention, two test sections and two lead sections are made according to a preset scale ratio, The test section and the two connecting sections form a closed-loop lane. By controlling the telescopic height of the retractable support structure, the longitudinal slope of the bridge can be adjusted, and by controlling the height of the adjustable support, the cross slope of the bridge can be adjusted. During the test, the test vehicle is placed on the closed-loop lane formed by the two test sections and the two connecting sections. After applying the corresponding counterweight to the test vehicle according to the test requirements, the test vehicle is controlled to move along the closed-loop lane, and the pressure test is used. The device measures the change of the support reaction force, and then can test and analyze the coupled vibration between the vehicle and the bridge. Compared with the traditional method of using numerical simulation to test the vehicle-bridge coupled vibration effect on different bridge types, the present invention has higher test accuracy, convenient test and good economy.

Further, the present invention controls the expansion and contraction of the telescopic tube through the jack, thereby controlling the height of the bridge, so as to facilitate the adjustment of the longitudinal slope of the bridge, with simple structure and low cost.

Further, in the present invention, the bottom of the telescopic support structure is fixed on the bottom plate, and the bottom plate is fixed on the ground, and the structure is more reliable.

Further, the adjustable support of the present invention includes a screw rod and a nut, the bottom of the screw rod is connected to the top of the retractable support structure, the nut is threaded on the nut, the top of the nut is connected with the bottom surface of the connecting plate, and the bridge is connected by rotating the nut. The adjustment of the cross slope has the advantages of simple structure, good adjustment precision and low cost.

Further, a buffer pad is also arranged between the pressure testing device and the connecting plate, which plays a buffering role and is beneficial to improve the stability of the overall structure.

Further, an anti-collision limiting device is provided on both sides of the bridge and the connecting panel to prevent the test vehicle from falling.

Further, multiple lanes are arranged on the bridge and the access panel, which can realize the closed-loop loading of multiple test vehicles.

Further, bridges and splice panels are sprinkled with sand to improve the roughness of the driveway.

Further, the bridges of the two test sections include any combination of box girder bridges, hollow slab bridges, T-beam bridges or arch bridges, which can simultaneously realize the vehicle-bridge coupled vibration test analysis of two different types of bridges.

In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

In order to illustrate the technical solutions in the specific embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the specific embodiments. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. , for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

Fig. 1 is the overall schematic diagram of a kind of vehicle-axle coupling vibration test structure of the present invention;

2 is a schematic diagram of a test section in a vehicle-axle coupled vibration test structure of the present invention;

Fig. 3 is a disassembled schematic diagram of the telescopic support structure of the test section in a vehicle-bridge coupled vibration test structure of the present invention;

4 is a schematic diagram of an adjustable support of a test section in a vehicle-axle coupled vibration test structure of the present invention;

FIG. 5 is a schematic diagram of a lead section in a vehicle-axle coupled vibration test structure of the present invention.

In the figure: 1- test section; 10- bridge; 11- telescopic support structure; 110- fixed pipe; 111- telescopic pipe; 112- first support plate; 113- second support plate; 114- jack; 12- can Adjusting support; 120-screw; 121-nut; 13-pressure test device; 14-connection plate; 15-buffer pad; 16-bottom plate; 2-connection section; 20-connection panel; 21-support piece; 3 - Anti-collision limit device; 4- Test vehicle.

Detailed ways

In order to make the purposes, 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. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts 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-axle coupled vibration test structure includes two test sections 1 and two lead sections 2 made according to a preset scale ratio. The test section 1 is arranged in parallel, and the two lead sections 2 are curved runways. The two ends of one lead section 2 are respectively butted with one end of the two test sections 1, and the two ends of the other lead section 2 are respectively connected with the two test sections. 1 is docked at the other end. In other words, among the two lead sections 2, one end of one lead section 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 lead section 2 is butted with one end of the other lead section 1 The other end of one test section 1 is butted, and the other end is butted with the other end of the other test section 1 . That is to say, the two test sections 1 and the two lead sections 2 form a closed-loop lane, and the bridge decks of the test sections 1 and the lead sections 2 are flush.

Specifically, as shown in FIG. 1 , FIG. 2 , FIG. 3 and FIG. 4 , the test section 1 includes a bridge 10 , a retractable support structure 11 , an adjustable support 12 , a pressure test device 13 and a connecting plate 14 . The pressure test device 13 is in contact with the bottom surface of the bridge 10, and the connecting plate 14 is connected to the bottom surface of the pressure testing device 13. Preferably, a buffer pad 15 is also provided between the pressure testing device 13 and the connecting plate 14. The rubber pad and the buffer pad 15 are connected with the connecting plate 14 and the pressure testing device 13 by means of bonding. The top of the adjustable support 12 is connected to the bottom surface of the connecting plate 14, the bottom of the adjustable support 12 is connected to the top of the telescopic support structure 11, and the bottom of the telescopic support structure 11 is fixed, preferably, a bottom plate 16 is fixed on the ground , the bottom of the retractable support structure 11 is fixed on the bottom plate 16 .

As a preferred embodiment, multiple lanes are provided on the bridge 10 , so that multiple test vehicles 4 can be loaded in a closed loop. Sand can be sprinkled on the bridge 10 and the access panel 20 to selectively simulate the roughness of the road surface. The bridges 10 of the two test sections 1 include any combination of box girder bridges, hollow slab bridges, T girder bridges or arch bridges, that is, the bridges 10 of one of the test sections 1 can be box girder bridges, hollow slab bridges, T girder bridges Any form of bridge or arch bridge, the bridge 10 of the other test section 1 can also be any form of box girder bridge, hollow slab bridge, T-beam bridge or arch bridge, and the bridges 10 of the two test sections 1 can be composed of different types. For bridges, the vehicle-bridge coupled vibration test analysis of two different types of bridges can be realized simultaneously. In the present invention, the bridge 10 can be made of different materials, such as plexiglass, steel, aluminum alloy and so on.

Preferably, the telescopic support structure 11 and the adjustable support 12 can be dismantled and moved, so the span number and span of the bridge can be easily adjusted.

2 and 3, the telescopic support structure 11 includes a fixed pipe 110, a telescopic pipe 111, a first support plate 112, a second support plate 113 and a jack 114. Specifically, the bottom of the fixed pipe 110 is fixed on the bottom plate 16, in this embodiment, the bottom of the fixing tube 110 is fixed on the bottom plate 16 by welding. Two adjacent fixing pipes 110 are connected by a first supporting plate 112 . In this embodiment, the first supporting plate 112 and the fixing pipe 110 are connected by welding. The lower end of the telescopic tube 111 is movably arranged in the fixed tube 110, and two adjacent telescopic tubes 111 are connected by a second support plate 113. In this embodiment, the second support plate 113 and the telescopic tube 111 are connected by welding. 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 tubes 111, the bottom of the jack 114 is fixed on the first support plate 112, and the top is fixed on the second support on board 113. That is to say, the expansion and contraction of the telescopic tube 111 is controlled by the lifting and lowering of the jack 114, and the height of the bridge 10 is further controlled, 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, which can be connected to the ground through bolts. The fixed tube 110 and the telescopic tube 111 are metal square tubes, and the diameter of the fixed tube 110 is larger than that of the telescopic tube 111 , so that the telescopic tube 111 can be inserted into the fixed tube 110 .

2, 3 and 4, the adjustable support 12 includes a screw rod 120 and a nut 121. Specifically, the bottom of the screw rod 120 is connected to the top of the second support plate 113, and the nut 121 is screwed on the nut 121. , the top of the nut 121 is connected with the bottom surface of the connecting plate 14 . In this embodiment, the top of the nut 121 and the bottom surface of the connecting plate 14 are connected 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.

1 and 5 , the lead section 2 includes a lead 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 lead panel 20 . In this embodiment, the connecting panel 20 is a metal panel, the support 21 is a frame-shaped member made of metal material, and the support 21 can also be removed and moved. Preferably, the access panel 20 is provided with the same number of lanes as the number of lanes on the bridge 10 , and sand is also scattered on the access panel 20 .

As a preferred embodiment, as shown in FIG. 1 , FIG. 2 and FIG. 5 , anti-collision limiting devices 3 are installed on both sides of the bridge 10 of the test section 1 and the connecting panel 20 of the connecting section 2 . In the present invention, the anti-collision limiting device 3 can be made of different materials, such as plastic, plexiglass, steel and the like.

In the present invention, the test vehicle 4 is a remote control test vehicle, which can be of various types. The weight of the vehicle can be adjusted by adding counterweights of different weights, and the speed and running track of the vehicle can be controlled by a remote control device or program.

When the present invention is in use, the test vehicle 4 is placed on the test section 1 according to the test requirements, and after the counterweight of the test vehicle 4 is adjusted, the test vehicle 4 is controlled to drive along the closed-loop lane formed by the test section 1 and the lead-in section 2 , obtain the real-time support and reaction force changes through the pressure testing device 13, and then test and analyze the coupled vibration between the vehicle and the bridge.

Finally, it should be noted that the above-mentioned embodiments are only specific implementations of the present invention, and are used to illustrate the technical solutions of the present invention, but not to limit them. The protection scope of the present invention is not limited thereto, although referring to the foregoing The embodiment has been described in detail the present invention, and those of ordinary skill in the art should understand: any person skilled in the art who is familiar with the technical field of the present invention can still modify the technical solutions described in the foregoing embodiments within the technical scope disclosed by the present invention. Or can easily think of changes, or equivalently replace some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be covered in the present invention. within the scope of protection. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (10)

1. A vehicle-bridge coupled vibration test structure, characterized in that it comprises two test sections (1) and two lead sections (2) made according to a preset scale ratio, wherein the two test sections (1) Parallel arrangement, the two ends of one of the connecting sections (2) are respectively butted with one end of the two test sections (1), and the two ends of the other connecting section (2) are respectively connected to the two test sections (1). The other end of the test section (1) is butted; the test section (1) includes a bridge (10), a telescopic support structure (11), an adjustable support (12), a pressure test device (13) and a connecting plate (14), 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 the adjustable support ( The top of 12) is connected with the bottom surface of the connecting plate (14), the bottom of the adjustable support (12) is in contact with the top of the telescopic support structure (11), and the telescopic support structure (11) bottom fixed. 2 . The vehicle-axle coupled vibration test structure according to claim 1 , wherein the telescopic support structure ( 11 ) comprises a fixed tube ( 110 ), a telescopic tube ( 111 ), a first support plate ( 2 . 3 . 112), a second support plate (113) and a jack (114), the bottom of the fixing pipe (110) is fixed, and two adjacent fixing pipes (110) are connected through the first support plate (112), so The lower end of the telescopic tube (111) is movably arranged in the fixed tube (110), two adjacent telescopic tubes (111) are connected by the second support plate (113), and the adjustable support (110) 12) The bottom is in contact with the top of the second support plate (113), a jack (114) is arranged between two adjacent telescopic tubes (111), and the bottom of the jack (114) is fixed on the On the first support plate (112), the top is fixed on the second support plate (113). 3 . The vehicle-axle coupled vibration test structure according to claim 2 , wherein the test section ( 1 ) further comprises a bottom plate ( 16 ), the bottom plate ( 16 ) is fixed, and the telescopic support The bottom of the structure (11) is fixed on the bottom plate (16). 4. A vehicle-axle coupled vibration test structure according to claim 1, wherein the adjustable support (12) comprises a screw (120) and a nut (121), and the screw (120) has a The bottom is connected to the top of the retractable support structure (11), the nut (121) is threadedly fitted on the nut (121), and the top of the nut (121) is connected to the bottom surface of the connecting plate (14) connect. 5 . The vehicle-axle coupling vibration test structure according to claim 1 , wherein a buffer pad ( 15 ) is further provided between the pressure test device ( 13 ) and the connecting plate ( 14 ). 6 . 6. A vehicle-axle coupling vibration test structure according to claim 1, wherein the connecting section (2) comprises a connecting panel (20) and a support (21), and the support ( 21) is fixed at the bottom, and the top of the support (21) is connected to the bottom of the lead panel (20). 7. A vehicle-bridge coupled vibration test structure according to claim 6, wherein an anti-collision limiting device (3) is provided on both sides of the bridge (10) and the connecting panel (20). ). 8 . The vehicle-bridge coupled vibration test structure according to claim 6 , wherein a plurality of lanes are arranged on the bridge ( 10 ) and the connecting panel ( 20 ). 9 . 9 . The vehicle-bridge coupled vibration test structure according to claim 8 , wherein the bridge ( 10 ) and the connection panel ( 20 ) are sprinkled with sand. 10 . 10. A vehicle-bridge coupled vibration test structure according to claim 1, wherein the bridges (10) of the two test sections (1) comprise box girder bridges, hollow slab bridges, T-beam bridges or Any combination of arch bridges.

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