摘要
混凝土结构在外部载荷作用下的破坏过程是初始损伤不断演化发展和新的损伤不断形成的过程.通过试验确定了混凝土在浇注过程中形成的初始损伤,并据此对Jeeho Lee的塑性损伤模型进行了修正,然后利用该模型对乌江上某重力坝进行了地震作用下的动力损伤分析,并分别与不记入动水压力影响和不考虑应变率影响的结果进行了对比,所得结论对混凝土坝的震害研究有一定的参考价值.
The failure of concrete structure is caused by both the evolution of initial damages and the forming of new damages. The initial damage developed during the concrete-pouring was ascertained through experiment, and then it was used to modify the Jeeho Lee plastic-damage model. The renewed model was used to evaluate the earthquake response of a gravity dam. The calculated result was compared to those without considering hydrodynamic interactions and strain rate, respectively. The conclusion is valuable for the earthquake analysis of dams.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2006年第6期1038-1041,共4页
Journal of Shanghai Jiaotong University
基金
国家重点基础研究发展规划(973)项目(2002CB412709)
关键词
混凝土坝
动力损伤
初始损伤
应变率
concrete dam
dynamic damage
initial damage
strain rate
