关门山面板堆石坝三维地震反应分析和研究

3-D seismic response of Guanmenshan concrete faced rockfill dam

本文通过对关门山面板堆石坝进行三维非线性动力计算，得到一些有价值的结论．计算中对堆石材料应用非线性弹性模型，用ＢＦＧＳ（Ｂｒｏｙｄｅｎ—Ｆｌｅｔｃｈｅｒ—Ｇａｌｄｆａｒｄ—Ｓｈａｎｎｏ）法迭代堆石体位移增量，对库水采用流固耦合方法联合计算，较准确地反映了面板堆石坝的动力特性和在水平地震作用下坝体加速度分布、面板动应力分布的规律．

The three dimersional nonlinear dynamic behaviors of Guanmenshan CFRD are estimated and some valuable conclusions are obtained. In the estimation, the rockfill is considered to be a nonlinear material and the liquid-solid coupling method is used to take intoaccount of reservoir water, meanwhile, the BFGS method of iteration is used to determinedisplacement increment. The improvements on time interval iterative method and on methodof using additional mass intead of dynamic water pressure enable the more accurate estimation of dynamic behaviors such as distribution of acceleration of the dam and dynamic stressof the concrete face.