景洪电站碾压混凝土重力坝强震监测分析  

Earthquake Monitoring Analysis of Jinghong Roller Compacted Concrete Gravity Dam

作　　者：曹学兴[1] 蒋金磊 李允鲁 郭丽娜[2] 吕兴[1] 

机构地区：[1]华能澜沧江水电有限公司,云南昆明650214 [2]云南工商学院,云南昆明651700

出　　处：《水电能源科学》2014年第10期70-74,共5页Water Resources and Power

基　　金：国家科技支撑计划项目(2013BAB06B04)

摘　　要：为分析景洪电站碾压混凝土重力坝在地震过程中的动力反应情况,对坝体上布置的五台强震仪在缅甸、勐海、景洪三次地震中获得的监测资料进行了时域和频域分析。结果表明,大坝在三次地震过程中加速度峰值较小,最大为37.26cm/s2;坝体顶部在地震过程中反应较强烈,其中以最高坝段坝顶地震反应最为强烈;大坝对地震波有明显放大作用,且远震对大坝的影响比同等加速度峰值条件下的近震更为不利;三次地震坝址区地震烈度都不超过5度,而景洪电站大坝抗震设防烈度为8度,故地震未对大坝产生明显不利影响。in order to analyze the dynamic response of Jinghong roller compacted concrete gravity dam during the earthquake, time domain and frequency domain analysis of monitoring data obtained by the 5 strong motion seismographs during Burma, Menghai and Jinghong earthquake of the dam were carried out. The results show that the peak acceleration of the dam is small with the maximum value of 37.26 cm/s^2 ; the response of the top of the dam is intensely, and the response of the crest of the dam section with the maximum height is the strongest; the dam has obvious amplification effect on seismic wave; the effect on the dam of teleseism is worse than near earthquake under the equivalent peak acceleration; the seismic intensity of dam site during three earthquakes is less than 5 degree; the seismic fortification intensity of Jinghong dam is 8 degree, so the earthquake has no obvious adverse effect on the dam.

关 键 词：景洪电站 碾压混凝土重力坝 强震仪 加速度 动力反应 

分 类 号：TV642.2[水利工程—水利水电工程]