【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。更多还原

【Abstract】 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.更多还原