考虑刚度退化的架空直立式码头抗震性能分析

SEISMIC ANALYSIS OF OVERHEAD VERTICAL WHARF CONSIDERING STIFFNESS DEGRADATION

三峡水库的建成运行提高了库区诱发地震的概率,同时由于架空直立式码头在使用过程中各构件会出现退化,因此展开考虑刚度退化的架空直立式码头抗震研究是至关重要的。本文以实际工程为例,利用Ansys建立三维有限元模型,采用瞬态动力学方法对码头刚度退化过程中的三种状态进行抗震分析。结果表明,随着码头构件刚度的退化,码头结构的最大水平位移不断增加,码头结构桩、立柱的内力先增大后减小,为同类工程的设计奠定基础。

The construction and operation of the Three Gorges Reservoir increase the probability of earthquake induced by the reservoir area,meanwhile the deterioration of the vertical pier construction happens in the service course,so it is important to carry out seismic research of the vertical pier under the stiffness degradation.Based on an engineering case study,this paper uses Ansys to build a three-dimensional finite element model to analyze the three kinds of conditions in the course of pier stiffness degradation.The results show that the maximum horizontal displacement of the wharf structure increases with the deterioration of the stiffness of the wharf members,and the internal forces of the wharf piles and columns firstly increase and then decrease,which lays the foundation for the design of similar projects.