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通过收集近年来大连地区地震安全性评价报告中土动力学参数的实验资料,统计分析粉质粘土、淤泥质粉质粘土、粘土、中砂、碎石、回填土和全风化板岩等7类土的实测动力学参数,给出了它们的动剪切模量比和阻尼比的统计值。然后,选取典型钻孔并建立了土层地震反应分析模型,分别运用本文统计值、94规范值(即原大连地震小区划的土动力学参数值)和袁晓铭等(2000)的推荐值进行土层地震反应计算,并将计算结果中的地表峰值加速度和反应谱形状进行了比较。结果表明,本文的统计值与袁晓铭等(2000)的推荐值非常接近,而与94规范值有很大的差别。
By collecting the experimental data of dynamic parameters of soil in the seismic safety assessment report of Dalian area in recent years, the data of 7 classes of silty clay, silty silty clay, clay, medium sand, gravel, backfill soil and fully weathered slate The measured dynamic parameters of soil show the statistical values of their dynamic shear modulus ratio and damping ratio. Then, the typical borehole was selected and the seismic response analysis model of soil was established. The statistical values of the paper, the standard values of 94 (soil dynamic parameters of original Xiandan seismic subdivision) and the recommended values of Yuan Xiaoming et al. (2000) Layer seismic response calculation, and the calculation results of surface peak acceleration and response spectrum shape were compared. The results show that the statistical value of this paper is very close to the recommended value of Yuan Xiaoming et al. (2000), but differs greatly from the 94 standard value.