【摘要】 采用三维非线性动力有限元法,对纳子峡水利枢纽面板砂砾石坝的地震反应特性进行了计算分析,获得了该坝在设计地震作用下的动力反应,包括坝体和面板的加速度反应、位移反应、应力反应,以及周边缝和面板接缝的位移反应等。在50 a超越概率10%地震作用下,坝体顺河向的最大加速度反应为6.8 m/s2,位移反应为59 mm,剪应力反应为238 kPa;周边缝和面板缝的位移反应很小。计算分析表明,该坝的抗震稳定性满足规范要求,该坝的设计在技术上是合理的。更多还原

【Abstract】 By use of the 3-dimensional dynamic non-linear FEM, the earthquake response behavior of Nazixia facing sand-gravel dam is researched in detail.The dynamic response properties of the dam are obtained under the designed earthquake action,such as the acceleration response,displacement response,stress response of the dam body and concrete face,as well as the displacement response of the peripheral joints and slab joints.Under the earthquake role of probability exceedance 10% in 50 years,the maximum acceleration reaction,displacement reaction and shear stress reaction of the dam body are 6.8 m/s2,59 mm and 238 kPa respectively,and the displacement reaction of the peripheral joint and slab joint is very little.The calculation and analysis show that the seismic stability of the dam body could meet the specifications,the design of the dam body is reasonable in technique.更多还原