采用类桁架优化方法研究大跨桥梁的构形

Structural Topology Optimization of Configuration in Long-Span Bridge Based on Truss-Like Material Model

采用类桁架拓扑优化方法研究大跨桥梁的选型.通过求解应力约束体积最小类桁架结构拓扑优化问题,得到不同跨高比下桥梁结构的拓扑构形,验证了桥梁构形与跨高比有关.典型算例结果表明:文中方法在大跨桥梁选型中可以节约成本、提高结构性能和缩短设计周期.

The configuration of long-span bridge is studied by the topology optimization method based on truss-like material model.By solving topology optimization of truss-like structures with minimal volume under stress constraints,the bridge configurations are established under different span-depth ratio,it′s found that the configurations are related to the span-depth ratio.The calculation results indicates that the optimal config-urations are conducive to save the cost,improve the performance of structure and shorten the design cycle in typical long-span bridge structure.