高混凝土重力坝整体抗震性能研究  

Study of Aseismic Performance of Integral High Concrete Gravity Dam

作　　者：陈灯红[1] 杜成斌[1] 卢晓春[2] 

机构地区：[1]河海大学工程力学系,南京210098 [2]武汉大学水利水电学院,武汉430072

出　　处：《三峡大学学报（自然科学版）》2010年第3期1-4,共4页Journal of China Three Gorges University：Natural Sciences

基　　金：973课题子题"高混凝土坝在地震荷载作用下的溃坝研究"(2007CB714104);中国水利水电科学研究院开放研究基金(2008538613);江苏省普通高校研究生科研创新计划(CX09B_155Z)

摘　　要：建立了考虑实际地形、地质条件影响的整体重力坝有限元模型,分别以规范反应谱、场地反应谱为目标谱合成了设计地震、校核地震下共4条人工地震波,然后对该整体重力坝模型在4种工况下进行了时程动力分析,并对坝体关键部位的主应力按极限状态公式进行了强度验算,结果表明:在该设计、校核地震作用下,高混凝土重力坝整体抗震性能比单个坝段要强,坝踵垫层混凝土和上、下游折坡处材料抗拉强度均满足要求;坝趾的抗压强度也满足要求,并且具有较大的安全裕度;场地谱人工波的计算结果与规范谱人工波的结果很接近.A 3D finite element model of an integral gravity dam considering the influence of actual topographical and geological conditions is built.Then four simulated earthquake waves are synthesized under the design earthquake and check earthquake conditions based on the specification spectra and the site spectra,respectively.The time-history analysis of the integral gravity dam under four calculation conditions are carried out.The principal stresses in main parts of the dam are checked by the limit state equation.It is concluded that the aseismic performance of integral high concrete gravity dam is better than the single monolith;and the concrete＇s tensile intensity of the integral gravity dam under the dynamic action meets the standard requirements.The compressive strength of the dam toe also meets the standard requirements,and has greater allowance.The results under different earthquake waves of the site spectra and the specification spectra are very close.

关 键 词：整体重力坝 抗震性能 时程动力分析 场地反应谱 

分 类 号：TV312[水利工程—水工结构工程]