Temporary pier component for aeroelastic model wind tunnel test in cable-stayed bridge construction period

Abstract

The utility model discloses a temporary pier member used for an aeroelastic model wind tunnel test in a cable-stayed bridge construction period, and relates to the technical field of aeroelastic model wind tunnel test in the cable-stayed bridge construction period, the temporary pier member comprises a base plate, a clamping assembly and a telescopic rod assembly, the base plate can be installed on a test steel plate through the clamping assembly, and the telescopic rod assembly is arranged on the base plate. The telescopic rod assembly can move on the test steel plate to support the bridge aeroelastic model, the telescopic rod assembly can adjust the position of the bridge aeroelastic model in the height direction of the main beam, and the bottom plate can move on the test steel plate to adjust the position of the bridge aeroelastic model in the span direction of the main beam. By adopting the temporary pier component for the aeroelastic model wind tunnel test in the cable-stayed bridge construction period, the height and the position of the temporary pier can be conveniently adjusted, and the influence of the position of the temporary pier on the buffeting response of a bridge in the construction period can be rapidly and clearly determined.

Description

Technical Field

[0001] This utility model relates to the field of wind tunnel testing technology for aeroelastic models during the construction period of cable-stayed bridges, and in particular to a temporary pier component for wind tunnel testing of aeroelastic models during the construction period of cable-stayed bridges. Background Technology

[0002] With the continuous development of my country's economy and the improvement of its infrastructure, the demand for long-span bridges in transportation is increasing. The increase in bridge span is accompanied by a decrease in the frequency of the bridge structure, thus making the wind resistance of bridge structures a growing concern. In particular, for long-span cable-stayed bridges constructed using cantilever construction, the frequency of the bridge structure is further lower than that of the completed bridge, exacerbating wind resistance issues, especially the frequent buffeting response in natural wind environments. In other words, the lower frequency of the bridge structure during construction results in a greater buffeting response, which can easily affect the normal progress of construction, and in severe cases, endanger the personal safety of construction workers and even lead to structural damage. Therefore, buffeting control during the construction of long-span cable-stayed bridges is essential.

[0003] Currently, commonly used buffeting control measures include installing mass-tuned dampers, wind-resistant cables, and temporary piers. Among these, temporary piers not only reduce buffeting response but also reduce static wind internal forces, and their effectiveness is relatively high, leading to their widespread use. To clarify the impact of temporary pier location on bridge buffeting response during construction, two methods are typically used: one is through bridge buffeting calculations, achieved numerically. This method is advantageous due to its low cost and high efficiency, but requires a highly accurate buffeting force model to ensure the accuracy of the calculation results. The other method is to use aeroelastic model wind tunnel tests. While this method can provide accurate and reliable bridge buffeting response results, it suffers from drawbacks such as high cost and long development time.

[0004] In existing aeroelastic model wind tunnel tests, steel frames with a certain rigidity are usually used to simulate temporary pier components. These frames are fixed to the predetermined temporary pier locations by welding and connected to the bridge aeroelastic model. Then, the bridge's buffeting response is measured through wind tunnel tests.

[0005] However, in the above-mentioned test process, in order to clarify the impact of the temporary pier position on the bridge's flutter response during the construction period, it is necessary to move the temporary pier position multiple times. Moreover, due to the bridge's alignment, the height of the main beam will change. Therefore, the traditional method of setting temporary pier components not only requires welding the temporary pier components multiple times, but also requires replacing temporary pier components of different heights according to the changes in the bridge alignment. The operation is quite cumbersome and greatly increases the cycle of the aeroelastic model wind tunnel test.

[0006] It is evident that designing a temporary pier component that can be quickly repositioned is a problem that urgently needs to be solved. Utility Model Content

[0007] The purpose of this invention is to provide a temporary pier component for wind tunnel testing of aeroelastic models during the construction period of cable-stayed bridges, in order to solve the problems existing in the above-mentioned related technologies, facilitate the adjustment of the height and position of the temporary pier, and help to quickly determine the impact of the position of the temporary pier on the bridge's flutter response during the construction period.

[0008] To achieve the above objectives, this utility model provides the following solution:

[0009] This utility model provides a temporary pier component for wind tunnel testing of aeroelastic models during the construction period of a cable-stayed bridge. It includes a base plate, a clamping assembly, and a telescopic rod assembly. The base plate can be installed on a test steel plate through the clamping assembly. The telescopic rod assembly is set on the base plate to support the bridge aeroelastic model. The telescopic rod assembly can adjust the position of the bridge aeroelastic model along the height direction of the main beam. The base plate can move on the test steel plate to adjust the position of the bridge aeroelastic model along the span direction of the main beam.

[0010] Preferably, the telescopic rod assembly includes a vertically arranged upper support tube, a lower support tube, and a buckle, and the outer diameter of the upper support tube is smaller than the inner diameter of the lower support tube; the upper end of the upper support tube is used to connect with the bridge aeroelastic model, the lower end of the upper support tube can be slidably inserted into the lower support tube, and can be fixedly connected to the lower support tube by the buckle; the lower end of the lower support tube is fixed to the base plate.

[0011] Preferably, the buckle includes a connecting sleeve, a connecting plate, and a bolt fastener. The connecting sleeve has an opening along the axial direction, and two connecting plates are provided. The two connecting plates are fixed side by side at the opening of the connecting sleeve. The connecting sleeve can be sleeved on the lower support tube, and the bolt fastener can connect the two connecting plates so that the upper support tube and the lower support tube are fixedly connected.

[0012] Preferably, at least two sets of connecting holes are provided between the two connecting plates, and the two sets of connecting holes are arranged along the axial direction of the connecting sleeve; at least two sets of bolt fasteners are provided, and the two sets of bolt fasteners are provided in a one-to-one correspondence with the two sets of connecting holes.

[0013] Preferably, the telescopic rod assembly further includes a support base, and the lower support tube is fixedly connected to the base plate through the support base; the support base is a frustum-shaped base.

[0014] Preferably, both the upper support pipe and the lower support pipe are steel pipes.

[0015] Preferably, the clamping assembly includes a U-shaped clamp and a fixing screw. The U-shaped clamp can clamp the edges of the base plate and the test steel plate, and the fixing screw can pass through one side of the clamping surface of the U-shaped clamp and abut against the base plate to fix the base plate and the test steel plate.

[0016] Preferably, the base plate is a square plate; at least four sets of clamping components are provided, and the four sets of clamping components can clamp at the four right-angle positions near the base plate.

[0017] This utility model achieves the following technical advantages compared to related technologies:

[0018] This invention provides a temporary pier component for wind tunnel testing of aeroelastic models during the construction period of cable-stayed bridges. The component includes a base plate, a clamping assembly, and a telescopic rod assembly. During wind tunnel testing of aeroelastic models during the construction period of cable-stayed bridges, the bridge aeroelastic model is connected to the test steel plate via the temporary pier component provided by this invention. The telescopic rod assembly allows adjustment of the position of the bridge aeroelastic model along the height direction of the main beam. Furthermore, since the temporary pier component provides this invention fixes the base plate to the test steel plate via the clamping assembly, when it is necessary to adjust the position of the bridge aeroelastic model along the span direction of the main beam, the clamping assembly is removed, and the base plate is moved to the desired position along the span direction of the main beam on the test steel plate. The position of the base plate is then fixed by the clamping assembly, thus achieving rapid repositioning of the temporary pier.

[0019] The temporary pier components provided by this utility model facilitate the adjustment of the height and position of the temporary piers, avoid the need to replace the temporary pier components to adjust the height, and avoid the need to repeatedly weld the temporary pier components to adjust the position. This greatly shortens the cycle of wind tunnel testing of the aeroelastic model during the construction period of cable-stayed bridges, and helps to quickly determine the impact of the temporary pier position on the bridge's flutter response during the construction period. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram illustrating the usage status of a temporary pier component for wind tunnel testing of a gaseous model during the construction period of a cable-stayed bridge, provided as an embodiment of this utility model.

[0022] In the diagram: 01-Test steel plate, 02-Bridge aeroelastic model, 1-Base plate, 2-Upper support pipe, 3-Lower support pipe, 4-Snap fastener, 5-Support seat, 6-U-shaped clamp, 7-Fixing screw. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] The purpose of this invention is to provide a temporary pier component for wind tunnel testing of aeroelastic models during the construction period of cable-stayed bridges, in order to solve the problems existing in related technologies, facilitate the adjustment of the height and position of the temporary pier, and help to quickly determine the impact of the position of the temporary pier on the bridge's flutter response during the construction period.

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figure 1 As shown, this embodiment provides a temporary pier component for wind tunnel testing of aeroelastic models during the construction period of a cable-stayed bridge. It includes a base plate 1, a clamping assembly, and a telescopic rod assembly. The base plate 1 can be installed on the test steel plate 01 through the clamping assembly. The telescopic rod assembly is set on the base plate 1 to support the bridge aeroelastic model 02. The telescopic rod assembly can adjust the position of the bridge aeroelastic model 02 along the height direction of the main beam. The base plate 1 can move on the test steel plate 01 to adjust the position of the bridge aeroelastic model 02 along the span direction of the main beam.

[0027] It should be noted that the test steel plate 01 refers to the supporting steel plate used to arrange temporary pier components in the wind tunnel test of the aeroelastic model during the construction period of the cable-stayed bridge, which extends along the span direction of the main beam; the bridge aeroelastic model 02 refers to the aeroelastic model designed at a certain scale according to the actual size and structural form of the cable-stayed bridge in the wind tunnel test of the aeroelastic model during the construction period of the cable-stayed bridge. Since the traditional temporary pier components are welded to the test steel plate 01, when it is necessary to adjust the position of the bridge aeroelastic model 02 along the span direction of the main beam, it is necessary to re-weld the temporary pier components. However, by using the temporary pier components provided in this embodiment, the position of the temporary pier can be quickly changed by moving the base plate 1 on the test steel plate 01 along the span direction of the main beam to the required position, and then fixing the position of the base plate 1 by the clamping assembly.

[0028] In this embodiment, the telescopic rod assembly includes a vertically arranged upper support pipe 2, a lower support pipe 3, a buckle 4, and a support base 5. The outer diameter of the upper support pipe 2 is smaller than the inner diameter of the lower support pipe 3. In this embodiment, both the upper support pipe 2 and the lower support pipe 3 are steel pipes. The upper end of the upper support pipe 2 is used to connect with the bridge aeroelastic model 02, and the lower end of the upper support pipe 2 can be slidably inserted into the lower support pipe 3 and can be fixedly connected to the lower support pipe 3 through the buckle 4. The lower end of the lower support pipe 3 is fixed to the base plate 1 through the frustum-shaped support base 5. The lower support pipe 3, the support base 5, and the base plate 1 are welded together. In use, a steel pipe is used to simulate a temporary pier. The upper support pipe 2 and the lower support pipe 3 are connected by the buckle 4, which can realize the expansion and contraction of the temporary pier along the height direction of the main beam.

[0029] In this embodiment, the buckle 4 includes a connecting sleeve, a connecting plate, and a bolt fastener. The connecting sleeve has an opening along the axial direction, and two connecting plates are provided. The two connecting plates are fixed side by side at the opening of the connecting sleeve. The connecting sleeve can be sleeved on the lower support pipe 3, and the bolt fastener can connect the two connecting plates so that the upper support pipe 2 and the lower support pipe 3 are fixedly connected.

[0030] Furthermore, in this embodiment, at least two sets of connecting holes are provided between the two connecting plates, and the two sets of connecting holes are arranged along the axial direction of the connecting sleeve; at least two sets of bolt fasteners are provided, and the two sets of bolt fasteners are provided in a one-to-one correspondence with the two sets of connecting holes.

[0031] In this embodiment, the clamping assembly includes a U-shaped clamp 6 and a fixing screw 7. The U-shaped clamp 6 can clamp the edges of the base plate 1 and the test steel plate 01, and the fixing screw 7 can pass through one side of the clamping surface of the U-shaped clamp 6 and abut against the base plate 1 so that the base plate 1 and the test steel plate 01 are fixedly connected.

[0032] Furthermore, in this embodiment, the base plate 1 is a square plate; at least four sets of clamping components are provided, and the four sets of clamping components can clamp at the four right-angle positions near the base plate 1.

[0033] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A temporary pier component for wind tunnel testing of aeroelastic models during the construction period of a cable-stayed bridge, characterized in that: The device includes a base plate, a clamping assembly, and a telescopic rod assembly. The base plate can be mounted on a test steel plate via the clamping assembly. The telescopic rod assembly is disposed on the base plate to support the bridge aeroelastic model. The telescopic rod assembly can adjust the position of the bridge aeroelastic model along the height direction of the main beam. The base plate can move on the test steel plate to adjust the position of the bridge aeroelastic model along the span direction of the main beam.

2. The temporary pier component for wind tunnel testing of aeroelastic models during the construction period of a cable-stayed bridge according to claim 1, characterized in that: The telescopic rod assembly includes a vertically arranged upper support tube, a lower support tube, and a buckle, wherein the outer diameter of the upper support tube is smaller than the inner diameter of the lower support tube; the upper end of the upper support tube is used to connect with the bridge aeroelastic model, and the lower end of the upper support tube can be slidably inserted into the lower support tube and can be fixedly connected to the lower support tube by the buckle; the lower end of the lower support tube is fixed to the base plate.

3. The temporary pier component for wind tunnel testing of aeroelastic models during the construction period of a cable-stayed bridge according to claim 2, characterized in that: The buckle includes a connecting sleeve, a connecting plate, and bolt fasteners. The connecting sleeve has an opening along the axial direction. Two connecting plates are provided, and the two connecting plates are fixed side by side at the opening of the connecting sleeve. The connecting sleeve can be fitted onto the lower support tube, and the bolt fasteners can connect the two connecting plates to fix the upper support tube and the lower support tube in a fixed connection.

4. The temporary pier component for wind tunnel testing of aeroelastic models during the construction period of a cable-stayed bridge according to claim 3, characterized in that: At least two sets of connecting holes are provided between the two connecting plates, and the two sets of connecting holes are arranged along the axial direction of the connecting sleeve; at least two sets of bolt fasteners are provided, and the two sets of bolt fasteners are provided in a one-to-one correspondence with the two sets of connecting holes.

5. The temporary pier component for wind tunnel testing of aeroelastic models during the construction period of a cable-stayed bridge according to claim 2, characterized in that: The telescopic rod assembly also includes a support base, and the lower support tube is fixedly connected to the base plate through the support base; the support base is a frustum-shaped base.

6. The temporary pier component for wind tunnel testing of aeroelastic models during the construction period of a cable-stayed bridge according to claim 2, characterized in that: Both the upper support pipe and the lower support pipe are steel pipes.

7. The temporary pier component for wind tunnel testing of aeroelastic models during the construction period of a cable-stayed bridge according to claim 1, characterized in that: The clamping assembly includes a U-shaped clamp and a fixing screw. The U-shaped clamp can clamp the edges of the base plate and the test steel plate, and the fixing screw can pass through one side of the clamping surface of the U-shaped clamp and abut against the base plate to fix the base plate and the test steel plate.

8. The temporary pier component for wind tunnel testing of aeroelastic models during the construction period of a cable-stayed bridge according to claim 7, characterized in that: The base plate is a square plate; at least four sets of clamping components are provided, and the four sets of clamping components can clamp at the four right-angle positions near the base plate.

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