基于损伤模型的输泄水塔地震响应分析

摘要

输泄水塔结构属于高耸水下建筑物，其地震安全性至关重要。以某水电站输泄水塔为例，采用ABAQUS有限元仿真技术进行了地震时程分析。针对输泄水塔部分嵌入地下、锁扣板设置的结构特点，建立了输泄水塔-库水-地基的三维动力有限元附加质量模型。考虑混凝土材料的非线性损伤特性，应用动力时程分析法分析了输泄水塔结构在静力荷载与地震叠加作用下的动力特性及应力变形分布情况，可为同类工程的设计与研究提供参考。%The water transport and drain tower belongs to high underwater structure and their seismic safety is very important. Taking a water transport and drain tower in a hydropower station as study case, the seismic analysis is performed with ABAQUS finite element simulation technology. In view of the structure characteristics of tower with a part embedded into ground and arranging locking plates, the three-dimensional dynamic model of tower-reservoir water-foundation with added water mass is established. By considering the nonlinear damage characteristic of concrete, the dynamic characteristics and stress and deformation distribution of water transport and drain tower under the joint action of static and seismic loads are analyzed with time-history analysis method. The results provide some directive advice for the design and research of other similar projects.