动态规划方法在斜拉桥模型索力优化中的应用

本文提出动态规划的方法来进行斜拉桥索力优化。介绍了实际试验模型的调整及模型的制作过程,详细介绍了模型试验方法,通过实验模拟斜拉桥整个施工流程,研究桥梁的工作状态,得到斜拉桥施工过程中节点位移变化,将试验结果与动态规划理论结果进行对比。建立斜拉桥有限元模型,与实验模型进行对比。研究表明：将用动态规划方法计算出来的斜拉桥主梁的竖向位移与各阶段理想竖向位移进行比较,发现二者相差很小,优化后内力分布更均匀,弯矩减小。说明了动态规划方法可以应用于斜拉桥索力优化。

Application of dynamic programming method in cable force optimization of cable-stayed bridge model

This paper presents a dynamic programming method to optimize the cable forces of cable-stayed bridges. This paper discusses the basic concept of dynamic planning, introduces the adjustment of the actual test model and the making process of the model, and introduces the model test method in detail. Through simulating the whole construction process of the cable-stayed bridge, the working state of the bridge is studied, and the node displacement changes in the construction process of the cable-stayed bridge are obtained. The test results are compared with the dynamic planning results. A single tower cable-stayed bridge model is established, and the dynamic programming method is used to optimize the cable force, which is compared with the original model. The results show that the vertical displacement of the main girder calculated by dynamic programming method is compared with the ideal vertical displacement of each stage, and the difference between the two is very small, the internal force distribution is more uniform after optimization, and the bending moment is reduced. The dynamic programming method can be applied to the optimization of cable forces.