永定桥碾压混凝土重力坝三维有限元动力分析

摘要

结合永定桥电站碾压混凝土重力坝，分析了在2种不同分缝布置下碾压混凝土重力坝的动力特性和地震动力响应。通过对比两种方案下(非溢流坝段)坝段的自振特性以及特征部位的地震动位移和应力响应，对结构抗震安全性做出评价，并提出相应优化措施。%Taking a dam of Yongding Bridge as an example, the dynamic characteristics and the seismic responses of RCC gravity dam with two different structural jointing design are studied. By the comparative analysis of natural vibration characteristics of dam section ( non-overflow) as well as the distribution laws of seismic displacements and stresses in RCC gravity dam under two different schemes, the structural seismic safety evaluation is made, and corresponding optimization measures are proposed.