东深供水工程矩形渡槽优化设计及受力分析

Optimum design and behavior analysis of rectangular flume of Dongshen Water-Supply Project

结合东深供水改造工程 ,采用混合离散变量优化方法 ,对钢筋混凝土矩形渡槽结构进行了优化设计 ,确定了满足基本设计条件的矩形渡槽方案。利用三维有限元技术 ,并考虑桩土相互作用规律 ,全面分析了矩形渡槽结构在动、静荷载作用下的整体受力性能。分析结果表明 ,矩形渡槽槽身在板件相交处应采用渐变过渡 ,以减小应力集中 ;在渡槽线路拐弯的地方 ,应加大纵向约束 ,以提高渡槽结构的抗震能力。三维有限元技术和基于解析法的优化设计方法相结合 。

In combination with the Dongshen water?supply project,the optimum design of the reinforced concrete rectangular flume was completed with the mixed discrete optimum method,the scheme of the flume satisfying the fundamental design demands was determined.Taking account of interaction between piles and soil,overall mechanical properties of the flume were analyzed with the three?dimension finite element method under static and dynamic loads. The study results indicated that, to reduce stress concentration, intersections of different plates of the flume should be transited gradually,and at the turning of the flume,longitudinal restrain should be strengthened to improve its earthquake resistance. So,the design and property analysis problem of the structure can be solved effectively through combination of the three?dimension finite element technology and the optimum design method.