齿墙对提高重力坝动力稳定性的时程法分析  

Time-history Analysis of Key Wall to Improve the Dynamic Stability of Gravity Dam

作　　者：秦净净 于洋 王刚 QIN Jingjing;YU Yang;WANG Gang(Yellow River Conservancy Technical College,Kaifeng 475004,Henan,China;Engineering Technology Research Center on the Structure Analysis and Evaluation for Soft Foundation of Kaifeng,Kaifeng 475004,Henan,China;Department of Construction Engineering,Dalian University of Technology,Dalian116023,Liaoning,China)

机构地区：[1]黄河水利职业技术学院,河南开封475004 [2]开封市软基工程结构分析评价工程技术研究中心,河南开封475004 [3]大连理工大学建设工程学部,辽宁大连116023

出　　处：《水力发电》2020年第4期61-64,69,共5页Water Power

基　　金：国家自然科学基金资助项目(51709125);河南省高等学校重点科研项目(18B570006);河南省开封市科技计划项目资助项目(1703003);黄河水利职业技术学院青年骨干教师培养计划。

摘　　要：采用有限元分析软件ABAQUS,以规范反应谱人工地震波作为输入,基于Mohr-Coulomb屈服准则,依据规范的Westergard公式在坝面设置附加质量单元,考虑大坝-库水相互作用,采用无质量地基模型输入设计地震动,黏弹性吸波边界模拟地震动能量向无限远域逸散的地基辐射阻尼效应,应用应力积分法分析了齿墙对重力坝坝体特征位置应力、相对位移和抗滑安全系数的时程影响,所得结论对类似地震地质条件下的相似体形的混凝土重力坝工程动力稳定性评价具有良好的参考价值。The finite element analysis software ABAQUS is used to analyze the time-history impact of key wall to gravity dam under earthquake,in which,the standard response spectrum artificial seismic wave is taken as inputting,the Mohr-Coulomb yield criterion is adopted for foundation rockmass,the additional mass unit is set on dam surface to consider the dam-storage water interaction according to Westergard formula,the design ground motion is input by using the massless foundation model,and the viscoelastic absorbing boundary is used to simulate the ground radiation damping effect of ground motion energy escaping to the infinity domain.The stress integral method is finally used to calculate the characteristic position stress,relative displacement and anti-sliding safety factor of the gravity dam.The analysis results have good reference value for the evaluation of dynamic stability of concrete gravity dam engineering with similar body type under seismic condition.

关 键 词：齿墙 时程分析 地基辐射阻尼效应 应力积分法 瞬态抗滑安全系数 

分 类 号：TV314[水利工程—水工结构工程]