马堵山重力坝地震响应三维有限元分析
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摘要
根据马堵山碾压重力坝的实际情况,建立坝基与坝体联合作用的三维有限元模型,采用时程分析法计算分析了该碾压混凝土重力坝的动力响应,研究了该坝的地震加速度反应、位移反应和应力反应及其分布规律,计算表明,在Ⅶ度地震设防烈度下,坝体的最大加速度反应在河床坝段顶部,约为5.5m/s2,放大5.56倍,坝体的最大位移反应也在河床坝段顶部,约为21.056 mm,坝体的最大应力反应为5 230.85 kPa,出现在河床溢流坝段坝踵处。该坝满足抗震设防的规范要求。
According to the actual condition of Madushan RCC Gravity Dam,the 3D finite element model of the joint action of dam and its foundation was set up.Using the time history analysis method,the seismic response of dam was calculated and analyzed,and the responses of earthquake acceleration,displacement and stress of the dam and their distribution laws were studied.The calculation showed the maximum acceleration response occurred at the dam crest of the riverbed dam section with5.5 m/s2,magnifying 5.56 times.The maximum displacement response also occurred at the same section with about 21.056 mm.The stress response of dam body is 5230.85 kPa,which occurred at the heel of overflow dam section.It is shown that the earthquake resistant design of the dam may fulfill the design specifications.
According to the actual condition of Madushan RCC Gravity Dam,the 3D finite element model of the joint action of dam and its foundation was set up.Using the time history analysis method,the seismic response of dam was calculated and analyzed,and the responses of earthquake acceleration,displacement and stress of the dam and their distribution laws were studied.The calculation showed the maximum acceleration response occurred at the dam crest of the riverbed dam section with5.5 m/s2,magnifying 5.56 times.The maximum displacement response also occurred at the same section with about 21.056 mm.The stress response of dam body is 5230.85 kPa,which occurred at the heel of overflow dam section.It is shown that the earthquake resistant design of the dam may fulfill the design specifications.
引文
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[2]何蕴龙,陆述远.碾压混凝土重力坝地震动力分析[J].武汉水利电力大学学报,1998,31.
[3]DL 50732-2000,水工建筑物抗震设计规范[S].
[4]沈振中,迟世春,陈剑.混凝土面板堆石坝高趾墙动力性态计算研究[J].水电能源科学,2005,23(1):73-75.
[5]Shen Zhenzhong,Wen Xuyu,Lv shengxi.Analysis of earth-quake responses for Jiudianxia concrete face rockfill dam[A].The Proceeding.Of the international Symposiac on Dams in the soci-eties of the 21st century[C].London:Published by Taylor&francis/Balkema,2006,1:925-930.
[2]何蕴龙,陆述远.碾压混凝土重力坝地震动力分析[J].武汉水利电力大学学报,1998,31.
[3]DL 50732-2000,水工建筑物抗震设计规范[S].
[4]沈振中,迟世春,陈剑.混凝土面板堆石坝高趾墙动力性态计算研究[J].水电能源科学,2005,23(1):73-75.
[5]Shen Zhenzhong,Wen Xuyu,Lv shengxi.Analysis of earth-quake responses for Jiudianxia concrete face rockfill dam[A].The Proceeding.Of the international Symposiac on Dams in the soci-eties of the 21st century[C].London:Published by Taylor&francis/Balkema,2006,1:925-930.
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