小湾拱坝动力时程分析及安全评价  

Dynamical Time-history Analysis of Xiaowan Arch Dam and Its Safety Assessment

作　　者：蒋昱州[1,2] 徐卫亚[1,2] 王如宾[1,2] 石崇[1,2] 张治亮[1,2] 

机构地区：[1]河海大学岩土工程研究所,江苏南京210098 [2]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098

出　　处：《水力发电》2009年第5期56-59,共4页Water Power

基　　金：国家自然科学基金重点项目(50539110);国家自然科学基金资助项目(50709008)

摘　　要：利用FLAC3D有限差分法程序,采用云南剑川自然地震波,对小湾水电站进行了动力时程分析,研究了高拱坝在地震荷载作用下的安全稳定性。结果表明:地震动力响应与地震波的频谱有直接关系;坝体位移变化取决于地震荷载持续时间、质点振动幅度和振动强度;地震荷载作用下的拱坝坝体特征点安全系数与地震波振幅及振动频率有关,点安全系数波动规律与地震波谱相似。In order to analyze the high arch dam stability of Xiaowan Hydropower Station under seismic load, FLAC^3D was used to carry out the dam dynamic analysis under Yunnan Jianchuan natural seismic waves, and then the security stability of high arch dam under earthquake Load was studied. The results show that dynamic response of earthquake is direedy related to seismic wave spectrum, the change of dam displacement is directly linked of duration of seismic loading, particle vibration amplitude and vibration intensity. Under seismic loading,the safety factor of feature points of arch dam is related with the seismic amplitude and vibration frequency, and the fluctuation law of point safety factor is similar to the earthquake spectra.

关 键 词：高拱坝 时程分析法 FLAC3D 数值分析 安全评价 小湾水电站 

分 类 号：TV642.4[水利工程—水利水电工程]