基于波动理论的进水塔塔背回填高度仿真分析  

Wave-motion theory based simulation analysis on height of backfill for rear of intake tower

作　　者：陈震[1] 何双华[1] 

机构地区：[1]华北水利水电学院土木与交通学院,河南郑州450011

出　　处：《水利水电技术》2012年第2期35-37,57,共4页Water Resources and Hydropower Engineering

基　　金：国家自然科学基金资助项目(50879065);华北水利水电学院高层次人才科研启动项目(001331)

摘　　要：以波动理论为基础,采用粘弹性人工边界模拟地震波的远域能量逸散效应,用ABAQUS有限元软件分析地震荷载作用下,塔背回填高度对进水塔结构动力响应的影响。塔背回填处与进水塔塔背接触位置为结构几何突变部位,塔背回填高度对进水塔结构的应力集中区域影响明显。因此存在一个合理的塔背回填高度,其不仅可降低塔背地震荷载的放大效应,也能有效缓解局部区域的应力集中,对结构的整体抗震设计有利。Based on the wave-motion theory,the seismic wave far-field energy dissipation is simulated with the visco-elastic artificial boundary,and then the impact from the height of the backfill for the rear of intake tower on the dynamic response of the tower structure under seismic load is analyzed herein.The position of the interface between the backfilling and the rear of intake tower is just the location of the structural geometric catastrophe,while the height of the backfill for the tower rear has a significant impact on the stress concentration zone of the tower structure.Therefore,there must be a reasonable height for the backfilling of the tower rear,which can not only decrease the amplification effect of seismic load on the tower rear,but also can effectively alleviate the local stress concentration therein and then be favorable to the seismic design of the whole structure concerned.

关 键 词：进水塔 波动理论 塔背回填高度 人工边界 有限元分析 

分 类 号：TV7[水利工程—水利水电工程]