关键词: 二阶段法, 中小跨径, 斜拉桥, 可变形初拉力, 索力优化

Abstract: Based on the theory of Influence Matrix, with the constraint optimization and the positive disposition analyses as its core, the "Two Stage Method" which is used for the cable tension optimization on short or medium span cable-stayed bridges is proposed. And then, an example is used to verify the correctness of this method. It can get the reasonable cable tensions without inverse analysis. This method can accelerate the solution procedure of cable tension optimization and it would be useful in the analysis of both the finished dead state and construction stage in short/medium span cable-stayed bridges.

Key words: Two Stage Method, short/medium span, cable-stayed bridge, variable form of cable tension, cable tension optimization