斜拉桥的索力测试及其参数识别

The Cable Tension Measurement and Parameter Identification for Cable-Stayed Bridge

对采用频率法测定斜拉桥索力时的若干问题诸如索的刚度 ,索的垂度 ,索的边界条件等因素对索力测试精度的影响进行了比较详尽的分析 ,并通过索力标定、对索的参数进行识别 ,最后通过番禺大桥的实测表明根据所测频率基于振动原理所获的索力在一般情况下具有相当的精度 ,可以满足斜拉桥施工控制的需要。

This paper deals with problems for cable tension measurement of cable_stayed bridges using frequency method.In this method parameters of the cables such as rigidity, sag, and boundary condition are necessary in order to determine the cable force from the measured frequencies, In this paper, an approach to identify some of those parameters is presented. It has been shown that the cable tension force can be obtained by this approach with a higher accuracy. And this will meet the needs of construction control of cable_stayed bridge.