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Koyna混凝土重力坝的塑性地震损伤响应分析 预览 被引量:11

SEISMIC PLASTIC DAMAGE RESPONSE ANALYSIS OF KOYNA CONCRETE GRAVITY DAM
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摘要 考虑了混凝土拉压异性损伤变量,根据相关流动法则推导了混凝土的损伤本构方程。通过有限元方法模拟坝体在地震激励下的非线性损伤演化过程,数值计算过程中考虑了库坝动力耦合及混凝土后继屈服的强化效应,采用四参数Ottosen屈服准则及相应的损伤型本构,算例验证了Koyna混凝土重力坝在竖向和横向实测地震激励下的非线性损伤响应特性。 Damage varible is considered due to difference of tension and compression of concrete.According to the associated flow rule the damage constitutive formulation is deduced.By finite element method(FEM),the plastic damage mechanical model is used to simulate nonlinear damage evolution of a Koyna concrete gravity dam subjected seismic excitations with hydrodynamic interaction between the dam and the reservoir.The strengthening effects of the postyielding of concrete,and the modified four-parameter Ottosen-type yielding criterion combined with the drivative constitutive relationship are taken in account. Examples show that the nonlinear seismic damage response characteristics of the Koyna dam subjected to the horizontal and vertical seismic waves are verified.
作者 邵长江 钱永久 Shao Changjiang Qian Yongjiu(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031)
出处 《振动与冲击》 EI CSCD 北大核心 2006年第4期 129-131,共3页 Journal of Vibration and Shock
关键词 混凝土重力坝 地震损伤 损伤本构 屈服函数 流固耦合 concrete gravirty dam,seismic damage,damage constitutive relationship,yielding criterion,fluid-solid interaction
作者简介 邵长江男,博士生,1970年1O月生
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参考文献10

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