Support system and bridge structure loading experiment device

Abstract

The utility model relates to the field of bridge structure loading experiments, and discloses a support system and a bridge structure loading experiment device.The support system comprises a horizontal displacement mechanism used for providing displacement for transverse horizontal movement of a loading beam body; and the supporting and rotating mechanism is slidably carried on the horizontal displacement mechanism and is used for supporting the loading beam body and providing rotation amount for rotation of the loading beam body. According to the support system, horizontal sliding of the horizontal displacement mechanism is used for simulating translation of the bridge structure mounting seat, vertical bending rotation of the bridge structure mounting seat is simulated in combination with the supporting rotation mechanism, and the support system can be closer to actual engineering application scenes.

Description

Technical Field

[0001] The utility model relates to the field of bridge structure loading experiments, in particular to a support system and a bridge structure loading experiment device. Background Art

[0002] The inclination and deflection of a bridge are important indicators for evaluating structural performance. They can reflect the stiffness and stability of the bridge and are used to evaluate changes in the overall deformation and load-bearing capacity of the bridge. In order to evaluate the mechanical properties of a bridge structure in the laboratory, it is necessary to perform a loading test on the bridge with the aid of a loading test device to obtain the mechanical performance data of the bridge under a specific load.

[0003] At present, there are many patents related to loading test platforms, such as patent CN103115828B discloses a composite torsion test device for components, which simulates the composite torsion performance of structural components under horizontal earthquakes, and solves the problem that it is difficult to simultaneously control the spatial forces that are not in the same plane acting on the components in such experiments; patent CN104568571B designs an automatic control device and automatic control method for bridge static load test, and invents a bridge static load test loading control device that matches the bridge static load test standard, which is a method for automatically controlling bridge static load test that can simultaneously achieve synchronous balanced loading and dynamic automatic balance. However, the above-mentioned experimental platforms do not take into account the problem of variable support conditions of structural components during loading (such as horizontal sliding of bridge mounting seats and vertical bending and rotation of bridge structure mounting seats). Summary of the invention

[0004] The utility model aims to provide a support system and a bridge structure loading test device to solve the problem that the existing test platforms do not take into account the variable support conditions of the structural components during the loading process.

[0005] In order to achieve the above utility model purpose, the technical solution adopted by the utility model is:

[0006] In a first aspect, the utility model provides a support system, the support system comprising:

[0007] A horizontal displacement mechanism, used to provide displacement for the lateral horizontal movement of the loading beam;

[0008] The supporting rotation mechanism is slidably mounted on the horizontal displacement mechanism and is used to support the loading beam and provide a rotation amount for the rotation of the loading beam.

[0009] Preferably, the horizontal displacement mechanism comprises: two guide rails, and a movable slider is slidably connected to the guide rails.

[0010] Preferably, the supporting rotation mechanism includes: a pair of mounting seats, the two mounting seats are respectively mounted on corresponding movable sliders, a connecting rod is provided between the two mounting seats, both ends of the connecting rod are rotatably connected to the mounting seats, a steering slider is sleeved on the connecting rod, and the steering slider is used to connect the loading beam body.

[0011] Preferably, a plurality of connecting bolts for connecting the loading beam body are provided on the top of the steering slider.

[0012] Preferably, both ends of the connecting rod are respectively passed through corresponding mounting seats, and a first limiting ring is provided on the connecting rod located outside each mounting seat.

[0013] Preferably, second limiting rings are provided on the connecting rods located on both sides of the steering slider, and a plurality of steel balls are provided between each second limiting ring and the side wall of the steering slider.

[0014] In a second aspect, the utility model provides a bridge structure loading test device, the device comprising:

[0015] Loading platform;

[0016] At least two groups of support systems are provided, each group of support systems is installed on the loading platform, a loading beam is provided above the support system, and the top of each group of support systems is connected to the loading beam.

[0017] Preferably, the device further comprises:

[0018] An experimental trolley, the experimental trolley being placed on the surface of the loading beam body;

[0019] The transmission system is arranged on the loading platform at one end of the loading beam body and is used for pulling the experimental trolley to move on the surface of the loading beam body.

[0020] The beneficial effects of the utility model are mainly embodied in:

[0021] The support system of the utility model utilizes the horizontal sliding of the horizontal displacement mechanism to simulate the translational movement of the bridge structure mounting seat, and combines with the support rotation mechanism to realize the simulation of the vertical bending rotation of the bridge structure mounting seat, which can be closer to the actual engineering application scenario. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of a support system provided by one embodiment of the utility model;

[0023] Figure 2 It is a schematic diagram of the overall layout structure of a bridge structure loading test device provided by one embodiment of the utility model;

[0024] Legend: 1. Transmission system; 2. Support system; 3. Loading beam; 4. Loading platform; 5. Experimental trolley; 201. Guide rail; 202. Moving slider; 203. Mounting seat; 204. Connecting rod; 205. Steering slider; 206. Connecting bolt; 207. First limiting ring; 208. Second limiting ring; 209. Steel ball. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] Embodiment 1

[0027] Figure 1 is a schematic diagram of the overall structure of a support system provided by an embodiment of the utility model, such as Figure 1 As shown, this embodiment provides a support system, and the support system 2 includes: a horizontal displacement mechanism and a support rotation mechanism; wherein the horizontal displacement mechanism is used to provide a displacement amount for the lateral horizontal movement of the loading beam 3; the support rotation mechanism is slidably mounted on the horizontal displacement mechanism, and is used to support the loading beam 3 and provide a rotation amount for the rotation of the loading beam 3.

[0028] In this embodiment, the horizontal displacement mechanism includes: two guide rails 201, and a movable slider 202 is slidably connected to the guide rails 201. The two guide rails 201 extend along the length direction of the loading beam body 3, and the horizontal sliding of the horizontal displacement mechanism can simulate the translation of the bridge structure mounting seat 203. The cross section of the guide rail 201 of this embodiment is Ω-shaped, which is conducive to limiting the out-of-plane displacement of the movable slider 202, so that it can travel straight along the guide rail 201 during operation and is not easy to derail.

[0029] In this embodiment, the supporting rotation mechanism includes: a pair of mounting seats 203, the two mounting seats 203 are respectively mounted on the corresponding movable sliders 202, a connecting rod 204 is provided between the two mounting seats 203, both ends of the connecting rod 204 are rotatably connected to the mounting seats 203, and a steering slider 205 is sleeved on the connecting rod 204, and the steering slider 205 is used to connect the loading beam body 3.

[0030] During the loading test, since the steering slider 205 can rotate on the connecting rod 204, the vertical bending rotation of the bridge structure mounting seat 203 can be simulated.

[0031] Therefore, the support system 2 of this embodiment utilizes the horizontal sliding of the horizontal displacement mechanism to simulate the translational movement of the bridge structure mounting seat 203, and combines the support rotation mechanism to realize the simulation of the vertical bending rotation of the bridge structure mounting seat 203, which can be closer to the actual engineering application scenario.

[0032] As a further optimization of this embodiment, a plurality of connecting bolts 206 for connecting the loading beam body 3 are provided on the top of the steering slider 205. Four connecting bolts 206 can be provided. The steering slider 205 and the loading beam body 3 are assembled by using the connecting bolts 206. The assembly operation is simple and convenient.

[0033] As a further optimization of this embodiment, the two ends of the connecting rod 204 are respectively passed through the corresponding mounting seats 203, and a first limiting ring 207 is provided on the connecting rod 204 located outside each mounting seat 203. The first limiting ring 207 can be used to achieve longitudinal limitation of the connecting rod 204 to prevent the connecting rod 204 from longitudinal displacement.

[0034] Secondly, a second limiting ring 208 is provided on the connecting rod 204 located on both sides of the steering slider 205. The second limiting ring 208 can prevent the steering slider 205 from moving axially along the connecting rod 204, and a plurality of steel balls 209 are provided between each second limiting ring 208 and the side wall of the steering slider 205. The setting of the steel balls 209 can reduce the friction between the contact surface between the second limiting ring 208 and the steering slider 205. Rolling steel balls 209 are encapsulated in the steering slider 205 to reduce the friction between the contact surface between the steering slider 205 and the cross bar.

[0035] In this embodiment, in order to reduce the friction between the rail and the movable slider 202 , a rolling steel ball 209 is also disposed between the guide rail 201 and the movable slider 202 to reduce the friction between the two.

[0036] Embodiment 2

[0037] Figure 2 It is a schematic diagram of the overall layout structure of a bridge structure loading test device provided by one embodiment of the utility model, such as Figure 2 As shown, this embodiment provides a bridge structure loading test device, the device comprising: a loading platform 4 and at least two groups of support systems of embodiment 1;

[0038] Each group of support systems 2 is installed on the loading platform 4 , a loading beam 3 is provided above the support system 2 , and the top of each group of support systems 2 is connected to the loading beam 3 .

[0039] Secondly, the device also includes: an experimental vehicle 5 and a transmission system 1;

[0040] The experimental trolley 5 is placed on the surface of the loading beam body 3;

[0041] The loading platform 4 is arranged at one end of the loading beam 3 and is used to pull the experimental trolley 5 to move on the surface of the loading beam 3 .

[0042] In this embodiment, the loading platform 4 is welded by square steel pipes and steel plates. In order to reduce the vertical displacement of the loading platform 4 during loading, the square steel pipes are densely arranged at the mounting seat 203. The loading platform 4 is placed (fixed with bolts) on the laboratory floor. The loading platform 4 is connected to the support system 2 by bolts, and the support system 2 is connected to the loading beam body 3 by four connecting bolts 206 on the steering slider 205. The loading beam body 3 is made of Q235 steel plate with a thickness of 4mm, a length of 5m, and a width of 200mm. The side-to-mid span ratio of the three-span continuous beam is set to 1:1.5 (mid span 2.14m, side span 1.43m).

[0043] The loading experiment device of this embodiment can perform static load simulation experiments and dynamic load simulation experiments;

[0044] Specifically, the static load simulation experiment is:

[0045] A loading plate is placed on the loading beam 3. The loading plate is made of Q235 steel plate with a length of 180mm, a width of 160mm, and a thickness of 4mm. The concentrated load condition is applied at the actual loading position. The mass of each steel plate is about 1kg. In order to better simulate the uniformly distributed load, a rubber pad is laid on the surface of the beam with a cross-section of 5mm×100mm.

[0046] Then place weights and other heavy objects on the loading plate to conduct a static load simulation experiment.

[0047] The dynamic load simulation experiment is:

[0048] The horizontal displacement and angular displacement of each support system 2 are adjusted by auxiliary devices such as the first limiting ring 207 and the second limiting ring 208. The experimental trolley 5 is connected to the transmission device with a steel strand, and the experimental trolley 5 is pulled by the transmission system 1 to travel along the track of the loading beam body 3 to simulate the driving condition of a car on the bridge.

[0049] It should be noted that, for the above-mentioned various method embodiments, for the sake of simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that this application is not limited by the order of the actions described, because according to this application, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and units involved are not necessarily required by this application.

Claims

1. A support system, characterized in that: The support system (2) comprises: A horizontal displacement mechanism, used for providing a displacement for the lateral horizontal movement of the loading beam (3); The supporting rotation mechanism is slidably mounted on the horizontal displacement mechanism and is used to support the loading beam body (3) and provide a rotation amount for the rotation of the loading beam body (3).

2. The support system according to claim 1, characterized in that The horizontal displacement mechanism comprises: two guide rails (201), and a movable slider (202) is slidably connected to the guide rails (201).

3. The support system according to claim 2, characterized in that: The supporting rotation mechanism comprises: a pair of mounting seats (203), the two mounting seats (203) are respectively mounted on corresponding movable sliders (202), a connecting rod (204) is arranged between the two mounting seats (203), both ends of the connecting rod (204) are rotatably connected to the mounting seats (203), a steering slider (205) is sleeved on the connecting rod (204), and the steering slider (205) is used to connect the loading beam body (3).

4. The support system according to claim 3, characterized in that A plurality of connecting bolts (206) for connecting the loading beam body (3) are provided on the top of the steering slider (205).

5. The support system according to claim 3, characterized in that: Both ends of the connecting rod (204) are respectively passed through corresponding mounting seats (203), and a first limiting ring (207) is provided on the connecting rod (204) located outside each mounting seat (203).

6. The support system according to claim 3, characterized in that: The connecting rods (204) located on both sides of the steering slider (205) are provided with second limiting rings (208), and a plurality of steel balls (209) are provided between each second limiting ring (208) and the side wall of the steering slider (205).

7. A bridge structure loading test device, characterized in that: The device comprises: Loading platform (4); At least two groups of support systems according to any one of claims 1 to 6, each group of support systems (2) is installed on a loading platform (4), a loading beam (3) is provided above the support system (2), and the top of each group of support systems (2) is connected to the loading beam (3).

8. The bridge structure loading test device according to claim 7, characterized in that: The device also includes: An experimental trolley (5), the experimental trolley (5) being placed on the surface of the loading beam body (3); The transmission system (1) is arranged on a loading platform (4) at one end of the loading beam (3) and is used to pull the experimental trolley (5) to move on the surface of the loading beam (3).

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