FLAC^(3D)在土石坝地震反应分析中的应用  

Application of FLAC^(3D) in Seismic Response Analysis of Embankment Dam

作　　者：杨星[1,2] 余挺[3] 杨贵[1,2] 

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098 [2]河海大学岩土工程科学研究所,江苏南京210098 [3]中国水电顾问集团成都勘测设计研究院,四川成都610072

出　　处：《水力发电》2012年第1期34-36,53,共4页Water Power

基　　金：江苏省博士后基金(1001011B);河海大学中央高校基金(2010B07814)

摘　　要：利用FLAC3D动力弹塑性模型对土石坝进行了地震反应分析,着重讨论了FLAC3D进行土石坝地震反应分析时的地震波滤波和基线校正、动力边界条件设置、瑞利阻尼参数确定等关键问题,并用FISH语言实现了坝体初始剪切模量和体积模量随平均主应力的非线性变化。分析结果表明,在地震荷载作用下,该土石坝发生了22.3 cm的竖向永久变形,坝顶加速度放大了2.9倍。The seismic response analysis of embankment dam under earthquake loading by using FLAC3D dynamic elasto- plastic model is performed herein. Some key issues are specially discussed, including baseline correction and filtering, dynamic boundary condition setting and Raleigh damping parameters setting. The non-linear changes of dam＇s initial shear modulus and initial bulk modulus with mean effective stress are also calculated by FISH. The results show that the embankment dam occur a 22.3 cm vertical permanent deformation and 2.9 times enlargement of dam crest acceleration under earthquake loading

关 键 词：土石坝 地震荷载 地震反应分析 FLAC3D 

分 类 号：TV641[水利工程—水利水电工程] P315.63[天文地球—地震学]