Tension test method for stay cable steel strand of partially cable-stayed bridge

A cable-stayed bridge cable steel and testing method technology, applied in the direction of tension measurement, etc., can solve the problems of short cable, low tension accuracy of cable steel strands, and difficult to accurately identify the bending stiffness of cable steel strands, etc. To achieve the effect of convenient testing process

Inactive Publication Date: 2011-07-13
ZHEJIANG UNIV
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Problems solved by technology

However, the epoxy steel strands of some cable-stayed bridge cables are bound together by cable clamps at both ends, and the length of the cables is relatively short. The influence of bending stiffness and boundary constraints on the natural frequency cannot be ig

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  • Tension test method for stay cable steel strand of partially cable-stayed bridge
  • Tension test method for stay cable steel strand of partially cable-stayed bridge
  • Tension test method for stay cable steel strand of partially cable-stayed bridge

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[0015] The test method provided by the present invention uses a section of the steel strand in a part of the cable-stayed bridge cable steel strand as the test section of the steel strand to test the fundamental frequency and bending rigidity of the section of the steel strand. Fundamental frequency, bending stiffness, length, quality parameters, according to the calculation theory of free vibration of cable considering the influence of bending stiffness, calculate the tension of some cable-stayed bridge cables; the test process of the fundamental frequency includes the following steps:

[0016] (1) Select any length of the steel strand in the cable-stayed bridge cable as the test section steel strand, and fix the two ends of the test section steel strand by connecting rigid bodies between the two ends;

[0017] (2) Use an acceleration sensor and a matching acquisition instrument to measure the fundamental frequency of the steel strand in the test section.

[0018] The bending stiffn...

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Abstract

The invention provides a tension test method for a stay cable steel strand of a partially cable-stayed bridge. A steel strand of a certain length is fixed in the stay cable steel strand of the partially cable-stayed bridge, and the fundamental frequency and bending stiffness of the steel strand are tested, so that the tension of the stay cable steel strand can be calculated based on the cable free vibration computation theory considering the influence of bending stiffness according to the fundamental frequency, bending stiffness, length and quality parameters of the steel strand. By utilizing the test method, the high-precision tension test result of the steel strand can be obtained; and moreover, the test process is convenient, and the test method meets the requirement of tension test in the construction process and operation period of the stay cable steel strand of the partially cable-stayed bridge.

Description

technical field [0001] The invention relates to a tension test method for steel strands of cables of partial cable-stayed bridges. Background technique [0002] The use of steel cables as a tension member can not only give full play to the use efficiency of high-strength materials, but also facilitate the design and construction of bridges. Steel cables have been widely used in arch bridges, cable-stayed bridges and suspension bridges since they were first used in the Brooklyn bridge in the United States in 1883. Due to the small cross-section of the tower body of some cable-stayed bridges, the cables pass through the bridge tower in the form of separate wire tubes, and each separate wire tube passes through an epoxy steel hinge wire. The epoxy steel strands are constructed by tensioning one by one. After the tensioning is completed, they are connected into a whole through cable clamps and put on the outer protective sleeve. Therefore, the bending stiffness and boundary co...

Claims

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Application Information

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IPC IPC(8): G01L5/04
Inventor 谢旭申永刚孙良凤
Owner ZHEJIANG UNIV
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