汶川地震紫坪铺进水塔的动态响应研究  

Dynamic Response Analysis of Zipingpu Intake Tower under Wenchuan Earthquake Action

作　　者：李宁[1] 李骞[1] 任堂 雷光宇[1] 

机构地区：[1]西安理工大学岩土工程研究所,西安710048 [2]中水北方勘测设计研究有限责任公司水工处,天津300222

出　　处：《地下空间与工程学报》2014年第5期1127-1134,共8页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金(51179153);国家自然科学基金创新群体(40821001)

摘　　要：作为高耸塔式结构的进水塔在强地震作用下的抗震稳定性具有非常重要的地位。采用时程分析法,辅以反应谱分析法,对地震荷载曲线的确定进行了研究。在研究过程中分析了两种方法共三种地震荷载曲线,通过对比结果得出时程分析法所确定的地震荷载曲线的准确性。根据该曲线进行紫坪铺1#进水塔的5.12汶川地震稳定性时程分析。针对低周往返地震荷载作用下,塔体结构与塔背山体以及地基岩体间薄弱面在张开、闭合、滑移过程中的应力释放和应力调整规律,引入动态接触单元,采用弹性连接和动态接触两种方法研究高耸进水塔结构在地震荷载作用下的抗震性能,确定塔体的整体抗震稳定性是可以保证的。采用动态接触研究进水塔-岩体联合动力相互作用是十分必要的。Time history analysis method was adopted to determine the seismic load curve, assisted by reaction spectrum analytical method. The contrast results indicated that the seismic load curve determined by time history a- nalysis method was aeeurate. Time history analysis on seismic stability of Zipingpu intake tower under the Wenchuan earthquake 512 was studied according to the curve. Based on the rules of stress release and stress adjustment for the weak interface between the tower structure and mountain body on the back of the tower as well as foundation rock mass, which is in the whole process of opening, closing and slipping under low cyclic earthquake loading. By introducing dynamic contact element, the elastic connection method and dynamic contact method were used to research dy- namic response of the high-rise intake tower structures under seismic loads. The results show that the seismic stability of the tower structure in whole can be guaranteed.

关 键 词：塔式结构 时程分析 反应谱分析 接触单元 抗震稳定性 

分 类 号：TV671[水利工程—水利水电工程]