动态规划方法在斜拉桥模型索力优化中的应用  

Application of Dynamic Programming Method in Cable Force Optimization of Cable-stayed Bridge Model

作　　者：方有亮[1] 武铮 张颖[1] FANG You-liang;WU Zheng;ZHANG Ying(College of Civil Engineering and Architecture,Hebei University,Baoding 071002,China)

机构地区：[1]河北大学建筑工程学院,保定071000

出　　处：《科学技术与工程》2020年第29期12131-12136,共6页Science Technology and Engineering

基　　金：河北省建设科技项目(2019-07-02)。

摘　　要：提出动态规划的方法来进行斜拉桥索力优化。研究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。实验与理论结果表明: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。First of all,the dynamic programming method was proposed to optimize cable forces of cable-stayed bridges.Then,the adjustment of the actual test model and the production process of the model were introduced,and the model test method was introduced in detail.Furthermore,the whole construction process of the cable-stayed bridge was simulated through the experiment,and the working state of the bridge was studied.In the process of cable-stayed bridge construction,the change of node displacement was obtained.Finally,the experimental results were compared with the theoretical results of dynamic programming.Comparing the vertical displacement of the main girder of the cable-stayed bridge calculated by the dynamic programming method with the ideal vertical displacement of each stage,it is found that the difference between the experimental result and theoretical result is very small.After optimization,the internal force is distributed more evenly and the bending moment is reduced.It shows that the dynamic programming method can be applied to the cable force optimization of cable-stayed bridge.

关 键 词：动态规划 斜拉桥 索力优化 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]