摘要
建立龙滩大坝-库水-地基的动力相互作用模型,并基于三维动力有限单元法对底孔坝段进行抗震分析。计算得到坝体的动水压力和坝体的5阶自振特性,并依据《水工建筑物抗震设计规范》所规定的振型分解反应谱法进行大坝的动力分析,对大坝的抗震安全性能作出评价,指出坝体的抗震薄弱部位。
A model of damwaterfoundation interaction is established for Longtan Hydropower Station and the strength computation is performed based on the 3D dynamic FEM for bottom dam section. The calculated dynamic water pressure on dam body and the characteristics of 5step free vibration of the dam body are applied to the dynamic analysis of the dam by way of modal decomposing response spectrum stated in Seismic Design Specification for Hydraulic Structures, based on which the seismic strength of the dam is evaluated and the weak part of the dam body is detected.
出处
《红水河》
2003年第3期6-9,共4页
Hongshui River
关键词
龙滩大坝
坝体
动水压力
振型分解反应谱法
抗震
底孔坝段
dam
free vibration characteristics
seismic strength analysis
Longtan Hydropower Station
