【摘要】 针对传统的线弹性模型不能准确模拟强震区碾压混凝土重力坝的地震响应问题,本文分析了坝体和地基同时考虑材料非线性时的鲁迪拉碾压混凝土坝地震损伤特性,其主要结论如下:地基岩体和坝体均采用非线性材料时,与坝趾相接处的地基产生损伤开裂,并随着地震动的持续,损伤裂缝逐渐向地基深度方向扩展,从而使得坝体应力重新分布,坝基交界处的应力集中释放,导致坝基交界处不会产生地震损伤。因此,坝体产生的地震损伤区域和损伤程度均有所减小,使坝体更偏安全,其结果更接近实际。更多还原

【Abstract】 The traditional linear elastic model cannot simulate the nonlinear seismic response analysis of RCC gravity dam in strong seismic regions.This paper analyzes?the seismic damage characteristics of Ludila RCC dam, when dam and foundation material nonlinearity? are considered at the same time. The main conclusions are as follows: When the foundation rock mass and the dam use the nonlinear materials, the foundation near dam toe is damaged, and with the continuous ground motion, the damage cracks extend gradually to the depth of the foundation. Thus, the stress redistribution of dam body and the stress concentration release at the juncture of dam foundation, which will not cause the earthquake damage at the dam foundation junction. Therefore the earthquake damage area and damage degree of the dam are reduced, which makes the dam more partial safety. The result will be more close to the actual, which has certain reference significance to the guiding project.更多还原