提高斜拉索索力估算精度的方法

振动法是测量实际索力的首选方法，但其测试精度会受到外界环境因素如温度、风和桥面对拉索作用等的影响。本文围绕如何将外界环境因素的影响降至最小，从测量时机的选取、数据处理方法的选择等方面，综合运用随机振动、风工程、非线性和误差分析理论，提出了提高拉索索力估算精度的实用改进方法，得出了一些有意义的结论。并通过哈尔滨松花江斜拉桥实例进行验证对比，结果表明，该方法具有较高的精度。

A method to enhance the estimation accuracy of stay cable tension

Vibration method is the primary method to measure the actual cable tension, but its accuracy will be influenced by external environment, such as temperature, wind and the effects of bridge on cable system and so on. This paper discusses how to minimize the influence of the external environment. From the time of measurement to the method of signal disposal, the random vibration theories, wind engineering theories, nonlinear analysis and error analysis theories are used simultaneously, and a useful method to enhance the estimation accuracy of stay cable tension is presented. Finally, by the analysis of the Songhua River's cable-stayed bridge in Harbin, the aforementioned method is evaluated.