软基中拱桥桥台位移分析及优化方案

Optimization plan and displacement analysis of arch bridge abutment in soft ground

基于工程实例对软基中某无铰拱桥桥台位移进行有限元分析,讨论分析过程中特殊非线性的处理方法,并在原设计基础上对桥台进行优化分析。研究结果表明:优化后桥台位移减小,且与实测值吻合,结构内力分布更加均匀,结构处于安全状态,从而也证明本文分析的合理性,所提出的优化变更方案是切实可行的,达到了预期的效果,对同类工程问题具有参考价值。

Based on project example, the displacement of a hingless arch bridge abutment which is in soft ground was analyzed by using finite element software. A processing method of special nonlinear problem was discussed in the analysis process, and the original design was optimized. The results show that the displacement of the abut- ment is decreases after optimization, and it is consistent with the measured value. Meanwhile the internal force distribution is more uniform, and the structure is under a safe state. The analysis in this paper is reasonable, and the optimization program is feasible, which has obtained the expected effect. The results have reference value for similar projects.