摘要
采用仿真混凝土材料研究碾压混凝土重力坝不同坝段模型在地震荷载作用下的破坏特征。通过施加不同的地震波,研究各种坝段的动力特性,并在此基础上进行了大坝的超载破坏试验,分析研究了重力坝各坝段的极限承载力和变形破坏机理,对比评价各坝段的抗震性能。试验结果表明,各坝段均首先在坝头部位发生开裂损伤,随着输入地震动加速度的逐级增加,不同坝段出现破坏的部位和破坏程度有所变化。试验结果为工程设计和全面定量评价重力坝各坝段的抗震性能提供重要依据。
The seismic rupture features of different monoliths of RCC gravity dam were studied by using simulation concrete material models. Using two sets of seismic waves, the dynamic responses of various dam sections on different seismic waves were investigated. Then the overloading rapture tests were carried out to analyze and research the ultimate bearing capacity and deformation rapture mechanism of the various dam sections of gravity dam and to compare and assess the earthquake resistant performances of dam sections. The test results showed that the first crack of RCC gravity dams during earthquake period appeared near the dam head. The rupture positions and damage degree changed of different dam sections as the input earthquake dynamic acceleration increases. These test results provided the important reference basis for the seismic safety evaluation and engineering design of gravity dam.
出处
《水力发电》
北大核心
2009年第5期33-35,共3页
Water Power
基金
国家自然科学基金资助项目(90510018)
关键词
水工结构
振动台
动力模型试验
仿真混凝土
破坏机理
hydraulic structure
vibration table
dynamic model test
simulation concrete
rupture mechanism
