基于新抗震规范的杨房沟高拱坝抗震安全分析与评价  

Seismic Safety Analysis and Evaluation of Yangfanggou High Arch Dam Based on New Seismic Code

作　　者：黄熠辉 徐建军 殷亮 魏海宁 李德玉[2] 张伯艳[2] 叶甜 HUANG Yihui;XU Jianjun;YIN Liang;WEI Haining;LI Deyu;ZHANG Boyan;YE Tian(Power China Huadong Engineering Corporation Limited,Hangzhou 311122,Zhejiang,China;China Institute of Water Resources and Hydropower Research,Beijing 100048,China)

机构地区：[1]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122 [2]中国水利水电科学研究院,北京100048

出　　处：《水力发电》2019年第4期52-55,83,共5页Water Power

摘　　要：杨房沟水电站混凝土双曲拱坝最大坝高155 m,抗震设防类别为甲类,根据现行的抗震设计规范的规定进行坝址区场地相关设计反应谱和人工地震动时程研究,对施工图阶段优化后的拱坝体形进行考虑坝体横缝强震开合和无限地基辐射阻尼效应的三维非线性有限元分析研究,并对拱坝坝肩潜在滑动块体采用基于振型分解反应谱法的刚体极限平衡法和基于时程分析法的时域刚体极限平衡法进行动力稳定性复核。最后对杨房沟拱坝抗震安全进行综合评价,可知在设计地震作用下,施工图阶段杨房沟拱坝优化体形的抗震安全可靠。The maximum height of concrete double-curvature arch dam of Yangfanggou Hydropower Station is 155 meters,and its seismic fortification category is Class A.According to the provisions of current code for seismic design,the site-related design response spectrum of dam site and the time history of artificial ground motion are studied.Subsequently,the three-dimensional non-linear finite element analysis on the shape of arch dam optimized and adjusted in construction drawing stage is carried out considering strong earthquake opening and closing of the transverse joints of dam and the radiation damping effect of infinite foundation,and for potential sliding blocks of dam abutments,the rigid body limit equilibrium method based on mode decomposition response spectrum method and the time domain rigid body limit equilibrium method based on time history analysis method are used to check the dynamic stability.Finally,the seismic safety of Yangfanggou arch dam is comprehensively evaluated.The evaluation results show that Yangfanggou arch dam after shape optimization in construction drawing stage is safe and reliable under the action of designed earthquake.

关 键 词：拱梁分载法 有限元法 时域刚体极限平衡法 动力分析 抗滑稳定 抗震安全评价 杨房沟高拱坝 

分 类 号：TV312[水利工程—水工结构工程]