摘要
建立了双曲拱桥的全桥平面有限元模型,对其主要病害进行数值模拟,分析了在主拱跨中损伤、拱脚损伤、拱脚竖向位移和拱脚水平位移四种病害情况下全桥的内力及结构位移的变化,通过遗传算法对全桥损伤(包括损伤位置和损伤程度)进行识别,结果表明遗传算法对双曲拱桥的主要病害识别有较好的精度.方法和结论对双曲拱桥的维修加固都有一定的参考价值.
This paper builds a plane model of a whole double-convex arch bridge based on the FEM, simulates the main damages of a double-convex arch bridge in numerical method and analyzes the internal forces and structural displacements in four damage models,such as damages in the arch crown,damages in the springing, and displacements of the springing. It gives damage identification to the whole double-convex arch bridge with Genetic Algorithm （GA）. Results indicate that the GA method of damage identification has a good precision. Methods and results are valuable for the maintenance and reinforcement of double-convex arch bridges.
出处
《武汉理工大学学报（交通科学与工程版）》
2009年第4期659-662,共4页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
国家西部交通建设科技项目资助(批准号:200731822330)
关键词
双曲拱桥
有限元分析
遗传算法
病害分析
诊断
double-convex arch bridge
FEA
genetic algorithm
damage analysis
damage diagnosis
