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SHAKE2000和LSSRLI-1分别是目前国外和国内广泛使用的两种一维等效线性化土层地震反应分析程序,分析二者之间的异同性及其与实测记录的差异程度,可为改进土层地震反应分析方法提供基础。收集整理了日本Ki K-net台网中17个软场地(Ⅲ、Ⅳ类场地)39次地震的基岩及地表地震动记录,其中基岩加速度峰值在6~214Gal之间,土层非线性取3种情况,采用SHAKE2000和LSSRLI-1两种程序分别进行了土层地震反应计算,从地表峰值加速度、加速度反应谱、加速度反应谱谱值比以及土层最大剪应变4个方面进行了对比计算。研究表明:当土体非线性不强时,SHAKE2000和LSSRLI-1计算出的PGA结果差异多数可忽略,计算出的土体剪应变最大值误差也多数小于20%;当土体非线性较强时,仅有少数差异可忽略,计算出土体剪应变最大值误差则多数大于20%;SHAKE2000的结果和LSSRLI-1与实测峰值加速度和反应谱多数情况下差异较大,土体弱非线性下LSSRLI-1结果稍好于SHAKE2000的结果,土体非线性较强时SHAKE2000的结果要好一些。
SHAKE2000 and LSSRLI-1 are two kinds of one-dimensional equivalent linearized soil seismic response analysis program widely used both in foreign countries and in China at present. Analyzing the similarities and differences between the two and their differences with the measured records, Layer seismic response analysis method to provide the foundation. The bedrock and surface ground motion records of 39 earthquakes in the soft ground (Ⅲ, Ⅳ) in the Ki K-net network of Japan were collected and collected. The peak acceleration of bedrock was between 6 and 214Gal, and the soil nonlinearity Taking three cases, the soil seismic responses were calculated by using SHAKE2000 and LSSRLI-1 programs, respectively, and compared with the peak acceleration, acceleration response spectrum, acceleration response spectrum ratio and the maximum shear strain of soil layer Calculate. The results show that most of the PGA results calculated by SHAKE2000 and LSSRLI-1 are negligible when the nonlinearity of the soil is not strong, and the errors of the calculated maximum values of soil shear strain are mostly less than 20%. When soil nonlinearity is strong , Only a few discrepancies can be neglected. The error of maximum value of soil shear strain was calculated to be more than 20%. The results of SHAKE2000 and LSSRLI-1 were different from those of measured peak acceleration and response spectrum in most cases. Soil weak nonlinearity The result of LSSRLI-1 is slightly better than the result of SHAKE2000. The result of SHAKE2000 is better when soil nonlinearity is stronger.