为研究大跨独塔斜拉桥索力优化方法,以某已建独塔斜拉桥为研究背景,建立其有限元模型以进行相关计算分析。首先介绍了索力优化的一般方法以及基于影响矩阵的索力优化的相关定义。对结构输入索力初值后,并施加一定的约束条件,利用影响矩阵对索力进行调整计算。计算结果表明:利用此种方法可以在满足预设约束条件下方便地得到多组索力优化结果。优化结果亦能根据实际需要进行再优化。通过简单的延伸,此法还能应用在梁式桥预应力优化以及吊杆拱桥吊杆力优化等更为广泛的工程实践中。 In order to study the method of cable force optimization for large span single tower cable-stayed bridge, a finite element model was established based on a built single tower cable-stayed bridge to carry out relevant calculation and analysis. Firstly, the general methods of cable force optimization and related definitions of cable force optimization based on impact matrix are introduced. After inputting the initial value of the cable force to the structure, and applying certain constraints, the influence matrix is ​​used to adjust and calculate the cable force. The calculation results show that this method can easily obtain multiple sets of cable force optimization results under the precondition constraints. Optimization results can be re-optimized according to actual needs. With a simple extension, this method can also be applied to a wider range of engineering practices such as prestressing optimization of beam bridges and boom force optimization of boom arches.