防汛墙的变形规律及其失效模式评判

本文采用有限元方法分析典型防汛墙结构变形规律，在采用比奥团结理论为基础的关口－太田本构关系的基础上，模拟土体的弹塑性性态及土体与墙体的共同作用，包括考虑因河床冲刷和河道疏浚引起的单元减少以及水位升降引起的荷载变化，及采用模糊数学的综合评判原理对防汛墙的失效模式进行了评判，分析得出导致墙体破坏的主要因素，成果可供防汛墙结构的安全性的监控和维护参考。

Research into the Deformation and Failure Mode Evaluation of Flood Control Wall in Shanghai

In this paper, the deformatiom of the type flood control wall in Shanghai is analysed with FEd. The constitutive model adopted was proposed by sekiguchi and Ohta, which could simulate the elasto-plastic behavior of soils, the action betwwen soil and structure, and the changes caused by the reduction of the elements and the fluctuation of the water level. Then evaluated the failure modes of the flood control wall with fuzzy comprehensive evaluation theory,and got the main factors leading to the failure. The results could be used as reference to the monitoring and maintenance of the wall.