岩基断层对混凝土重力坝地震响应的影响分析  

Influence Analysis of Faults in Rock Foundation on the Seismic Response of Concrete Gravity Dam

作　　者：燕柳斌[1] 陈志[1] 苏国韶[1] 

机构地区：[1]广西大学土木建筑工程学院,广西南宁530004

出　　处：《水力发电》2011年第7期23-26,共4页Water Power

基　　金：广西自然科学基金项目(0832023)

摘　　要：为探讨岩基中断层对混凝土重力坝响应的影响规律,根据正交实验设计原理,采用基于有限单元法的振型分解反应谱法,分析单组断层的倾角、厚度、弹性模量、泊松比、与坝体相对位置等多种因素对混凝土重力坝地震响应的影响规律。研究表明,影响因素的强弱顺序依次断层的倾角、与坝体相对位置、弹性模量、厚度及泊松比。在含断层岩基的重力坝抗震设计中,应着重考虑断层的倾角、与坝体相对位置对重力坝的影响。In order to explore the influences of the faults in rock foundation on the seismic response of concrete gravity dam, the influences caused by the factors of fault dip, thickness, elastic modulus, Poisson＇s ratio and relative position to dam are studied respectively by using FEM-based modal response spectrum method according to orthogonal experimental design theory. The results show that the factors having influence to seismic response by strong to weak order is dip, relative position to dam, elastic modulus, thickness and Poisson＇s ratio. The fauh dip and relative position to dam should be emphatically considered in the aseismic design of gravity dam which founds on the rock base with faults.

关 键 词：重力坝 地震响应 振型分解反应谱法 断层 

分 类 号：TV312[水利工程—水工结构工程]