一种确定斜拉桥合理成桥索力的综合方法探讨

A Comprehensive Method of Determining the Rational Completion Cable Forces of Cable-stayed Bridges

斜拉桥是一种高次超静定结构,索力的大小对结构的受力影响非常大,确定斜拉桥合理成桥状态的关键问题是如何控制斜拉索在成桥时的索力。围绕这一问题,在比较各种控制索力方法特点的基础上,介绍了综合刚性索法和自动调索法确定合理成桥索力的原理和步骤,通过算例证明,该方法概念明确、计算方便,所得结果满足要求。

Cable-stayed bridge is a high-order hyperstatic structure. The size of cable force greatly affects the stress of the structure. The key to determining the rational completion status of cable-stayed bridges is how to control cable force on completion status. As for this problem, and on the basis of comparing the characters of every method of cable force, the principle and steps of using synthesizing rigid cable method and self-adjusting cable method to determine the rational completion cable forces were presented. The examples testify that the conception of the method is distinct, and the calculation is convenient, and that the result meets the requirements.