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Method for determining grinder transverse static displacement of long-span bridge structure

A bridge structure and static displacement technology, which is applied to determine the load effect of long-span bridge structural members and the field of determining the lateral static displacement of the main beam of the long-span bridge structure, can solve the problem of less monitoring and analysis work, and the unknown change law of the lateral static displacement of the main beam member. And other issues

Inactive Publication Date: 2014-07-02
SOUTHEAST UNIV
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Problems solved by technology

However, there is little monitoring and analysis work on the lateral static displacement of main girder components at present, and the change law of the lateral static displacement of main girder components under real environmental conditions is still unknown. method for lateral displacement of main girder under conditions

Method used

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  • Method for determining grinder transverse static displacement of long-span bridge structure
  • Method for determining grinder transverse static displacement of long-span bridge structure
  • Method for determining grinder transverse static displacement of long-span bridge structure

Examples

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Embodiment

[0117] Take the main girder transverse static displacement analysis of Sutong Bridge as an example below to illustrate the specific implementation process of the present invention.

[0118] (1) Sutong Bridge is a bridge across the Yangtze River connecting Nantong and Zhenjiang. It adopts a double-tower and double-cable-plane cable-stayed bridge structure system, in which the main girder is in the form of a streamlined flat steel box girder, and the longitudinal design dimension of the main span reaches 1088m , this design dimension makes the main girder members have obvious lateral displacement effect at the mid-span under the action of wind load in the transverse bridge direction. Based on the bridge structural health monitoring system, long-term monitoring and data collection are carried out for the three-dimensional wind field and GPS displacement response at the mid-span of the main girder. The specific monitoring instrument layout is as follows figure 1 As shown, the samp...

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Abstract

The invention discloses a method for determining girder transverse static displacement of a long-span bridge structure. The method comprises the following steps that step (1) GPS displacement in a girder span and monitoring data of a three-dimensional wind field are collected; step (2) vector decomposition and mean processing are conducted on the monitoring data, and transverse static displacement and transverse static wind speed data are acquired; step (3) main correlative components of the transverse displacement intervened by the transverse static wind speed are fitted by the adoption of the 3-order Fourier series; step (4) discrete components of the transverse static displacement are fitted by the adoption of the mean - variance model; step (5) the fitting transverse static displacement of the girder members of the long-span bridge structure is determined. According to the method, a mathematical modeling method is adopted based on the monitoring data, and the transverse static displacement of the girder members of the long-span bridge structure can be more accurately determined.

Description

technical field [0001] The invention belongs to the field of load effect analysis of structural members of long-span bridges, and relates to a method for determining the load effect of structural members of long-span bridges, in particular to a method for determining the lateral static displacement of main girders of long-span bridge structures. Background technique [0002] The cable-bearing long-span bridge structure system has been widely used in bridge design types. Due to its lightness and softness, the main girder members will have obvious lateral displacement responses when they are subjected to large wind loads. According to Xu Fuyou et al. Static wind response research shows that the lateral static displacement of the main beam member at the mid-span position will reach 1.2m when subjected to a static wind speed of 40m / s. This lateral displacement size seriously affects the normal use and safety performance of long-span bridge structures during operation. Therefore...

Claims

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Application Information

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IPC IPC(8): G01M9/00
Inventor 丁幼亮王高新谢辉宋永生
Owner SOUTHEAST UNIV
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