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根据马堵山碾压混凝土重力坝的工程地质条件,选择典型坝段建立坝体和坝基的三维有限元模型,采用反应谱法计算分析了该坝的动力响应,研究了该坝的位移、应力和地震加速度的响应及其变化规律,并分析了坝体位移和应力在地震作用加载后的变化情况。计算结果表明,在设计地震作用下,坝体的最大动位移为7.59 mm,发生在坝体顶部;坝体的最大动应力为1.8 MPa,出现在坝踵部位;最大动加速度为1.466 m/s2,发生在坝体顶部。该坝在设计地震作用下强度满足要求。
According to the engineering geological conditions of Mudushan RCC gravity dam, three-dimensional finite element model of dam body and dam foundation is established by typical dam section. The dynamic response of the dam is calculated and analyzed by response spectrum method. The displacement, And the response of the earthquake acceleration and its variation, and analyzes the changes of the dam displacement and stress after the earthquake action loading. The calculated results show that the maximum dynamic displacement of the dam body is 7.59 mm and the maximum dynamic stress of the dam body is 1.8 MPa and occurs at the heel of the dam under the designed earthquake. The maximum dynamic acceleration is 1.466 m / s2 , Occurs at the top of the dam. The dam strength in the design of the earthquake to meet the requirements.