Method for transverse stiffness control over high-pier large-span concrete continuous girder bridge and bridge

Abstract

The invention relates to the technical field of high-pier long-span concrete bridges, in particular to a method for controlling the lateral stiffness of high-pier long-span concrete continuous girder bridges and bridges. The control method includes: a. determining the span of the continuous girder bridge and the height of the pier; b. setting Obtain the corresponding vehicle-bridge coupling dynamic response value under different bridge pier transverse line stiffness; c, compare and draw the curve of the bridge pier transverse line stiffness and the corresponding vehicle-bridge coupling dynamic response value; d, obtain the transverse stiffness limit of the continuous girder bridge; e. Determine the design parameters of continuous girder bridges that meet the requirements of the lateral stiffness limit. In this control method, by changing the transverse line stiffness of the bridge pier, the curve diagram of the corresponding vehicle-bridge coupling dynamic response value is obtained, and the lateral stiffness under the vehicle-bridge coupling dynamic response value that meets the requirements is selected to obtain the stiffness limit, and then the bridge design parameters, The stiffness of the continuous girder bridge is controlled to ensure the structural safety of the bridge during use and the safety, stability and comfort requirements of the train when it is running.

Description

technical field [0001] The invention relates to the technical field of high-pier long-span concrete bridges, in particular to a method for controlling the transverse stiffness of high-pier long-span concrete continuous beam bridges and the bridge. Background technique [0002] my country is a country with many mountains, and the area of ​​mountainous areas accounts for about 2 / 3 of the country's land area. The environment and geology of high-speed railway bridges in mountainous areas are complex, and the terrain changes frequently. When building a railway in this area, the line will inevitably cross deep ditches and deep valleys, and a large number of high-pier and long-span bridges need to be built. As an important part of the bridge structure, the bridge pier must ensure the safety, comfort, durability and good performance of the overall structure of the bridge. power performance. [0003] Stiffness control of long-span railway bridges with high piers is a complex issue. ...

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Problems solved by technology

[0013] The purpose of the present invention is to: in the prior art, when building high-pier and long-span concrete continuous bridges, because the transverse stiffness of the continuous beam bridge cannot be controlled, it can only be determined according to experience that the transverse stiffness of the continuous beam bridge may be insufficient, thereby affecting the bridge. To solve the problems of safety, driving safety, stability and comfort, a method for controlling the transverse stiffness of high-pier and long-span concrete continuous girder bridges and bridges is provided. The control method obtains the transverse stiffness of different bridge piers and the corresponding vehicles by changing the transverse stiffness of bridge piers. The curve diagram of the bridge coupling dynamic response value, and select the lateral stiffness under the vehicle-bridge coupling dynamic response value that meets the requirements to obtain the stiffness limit value, and then obtain the bridge design parameters according to the stiffness limit value, so that the stiffness of the continuous girder bridge can be controlled and ensured The structural safety of bridges during use, and the safety, stability and comfort requirements of trains running

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