摘要
本文在研究了数百个工程场地钻孔资料的基础上,选取和构造了209个有代表性的典型场地剖面,利用目前工程上广泛应用的一维等效线性化波动方法,进行了6种输入强度下(30gal、50gal、100gal、150gal、200gal、300gal)的场地土层地震反应分析。在计算时对每种工况均采用9条互不相关的基岩加速度时程作为输入地震波,同时用均方差来定量评估所得到的地面加速度峰值的离散性,发现计算结果离散性很大,其最大均方差为0.206,最小均方差为0.138,且离散性随基岩地震动输入强度的增大而变大,随场地类别的变差也变大。
Based on hundreds of actual engineering site profiles,we select and build 209 significant site profiles.The ground peak accelerations of constructions with different soil layers are calculated under six different input intensities （30gal, 50gal, 100gal, 150gal, 200gal, 300gal） through the equivalent linearization and wave propagation method for the earthquake response analysis of soil layers.Some more serious discreteness is showed in the seismic peak ground analysis.The maximum mean-square deviation of seismic peak ground acceleration is 0.206,while the minimum mean-square deviation is 0.138.The larger mean-square deviation is in the worse site sort than in the better site sort region.And the mean-square deviation also increases when the input intensity earthquake in bedrock increases.
出处
《震灾防御技术》
2011年第4期416-426,共11页
Technology for Earthquake Disaster Prevention
基金
地震行业科研专项项目(201008006)资助
关键词
场地条件
地震反应
地面加速度峰值
离散性
Site condition
Earthquake response
Ground peak acceleration
Discreteness
