混凝土重力坝的地震响应分析
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摘要
进行了某混凝土重力坝在多遇和罕遇地震荷载作用下的二维地震响应分析,比较了水位条件对大坝动力响应的影响。研究表明,在多遇地震荷载作用下,大坝应力应变关系基本处于弹性状态,在罕遇地震荷载作用下,最大地震动位移出现在大坝上侧,随着水位的上升,大坝上侧的位移和坝踵处动应力逐渐减小,而下游坝面折坡处的动应力基本不变。
Two-dimensional seismic responses of a concrete gravity dam under action of frequent and rare earthquakes were analyzed and influences of water level conditions on dynamic response of the dam were compared.The results show that under the frequent earthquake load the stress-strain relationship is basically in elastic deformation phase,while under the rare earthquake load,maximum seismic displacement occurs at the top of the dam,and with the increase of water level,displacement at top of the dam and dynamic stress at the dam heel decrease,and stress at the off slope of the dam changes slightly.
Two-dimensional seismic responses of a concrete gravity dam under action of frequent and rare earthquakes were analyzed and influences of water level conditions on dynamic response of the dam were compared.The results show that under the frequent earthquake load the stress-strain relationship is basically in elastic deformation phase,while under the rare earthquake load,maximum seismic displacement occurs at the top of the dam,and with the increase of water level,displacement at top of the dam and dynamic stress at the dam heel decrease,and stress at the off slope of the dam changes slightly.
引文
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[3]林皋,陈健云.混凝土大坝的抗震安全评价[J].水利学报,2001(2):8-15.LIN Gao,CHEN Jianyun.Seismic safety evaluation of large concrete dams[J].Journal of Hydraulic Engineering,2001(2):8-15.(in Chinese)
[4]傅作新.混凝土坝抗震设计中的若干问题[J].河海大学学报:自然科学版,1980(3):25-33.FU Zuoxin.Seismic design of concrete dams in a number of issues[J].Journal of Hohai University:Natural Sciences,1980(3):25-33.(in Chi-nese)
[5]何蕴龙,陆述远,段亚辉.重力坝地震动力响应分析[J].世界地震工程,1998,14(3):32-36.HE Yunlong,LU Shuyuan,DUAN Yahui.Seismic response analysis of gravity dam[J].World Information On Earthquake Engineering,1998,14(3):32-36.(in Chinese)
[6]汪家正,闫贵平.基于Ansys的重力坝地震动力有限元分析[J].华北水利水电学院学报,2006,27(1):25-33.WANG Jiazheng,YAN guiping.The analysis of seismic dynamic on gravity dam with ANSYS[J].Journal of North China Institute of Water Con-servancy and Hydroelectric Power,2006,27(1):25-33.(in Chinese)
[7]林皋.混凝土大坝抗震安全评价的发展方向[J].防灾减灾工程学报,2006,26(1):1-12.LIN Gao.Developing tendency of the seismic safety evaluation of large concrete dams[J].Journal of Disaster Prevention and Mitigation Engineer-ing,2006,26(1):1-12.(in Chinese)
[8]GB50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.GB50011-2010 Seismic Design of Buildings[S].Beijing:China Building Industry Press,2010.(in Chinese)
[9]王金昌,陈页开.ABAQUS在土木工程中的应用[M].浙江:浙江大学出版社,2006.WANG Jinchang,CHEN Yekai.ABAQUS Used in Civil Engineering[M].Zhejiang:Zhejiang University Press,2006.(in Chinese)
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