斜拉桥主梁横截面拓扑优化研究

摘要

由于斜拉桥主梁受力条件复杂,设计时都是根据经验拟定初始结构尺寸,进行多次试算而取得满足条件的较优结构形式.结合军山长江斜拉桥工程,在分析传统的渐进结构拓扑优化法奇异性问题的基础上,提出了能保证收敛的双向渐进结构优化法,并对斜拉桥主梁横截面进行拓扑优化研究.%For complicated stress condition of the main beam of cable stayed bridge, the initial structure dimension is commonly determined according to experience in design and the relatively optimum structure that satisfies the requirement is obtained through several calculations. In this paper, combined with Junshan Yangtze River cable stayed bridge project, through analyzing singular problems of traditional evolutionary structural topological optimization, the bi-directional evolutionary structural optimization that can ensure convergence is advanced. Thus the topological optimization of beam cross section of cable stayed bridge is studied.