ABSTRACT

The contemporary two-parameter-based site classification system of Korea, which is depth to bedrock and averaged shear wave velocity of soil deposits overlying the bedrock, has been reported to be ineffective in representing the unique amplification characteristics of shallow bedrock profiles. A new site classification scheme conditioned on site natural period and corresponding intensity-dependent seismic coefficients for Korean site conditions is proposed based on extensive one-dimensional non-linear site response analysis outputs. It is highlighted that the proposed site classification system and site coefficients coupled with a new elastic response spectrum considerably reduce the residuals with the computed site response analysis outputs.

摘要

据报道，韩国当代基于双参数的场地分类系统，即基岩深度和覆盖基岩的土壤沉积物的平均剪切波速度，在代表浅层基岩剖面的独特放大特征方面无效。基于广泛的一维非线性场地响应分析输出，提出了一种以场地自然周期和相应的韩国场地条件的强度相关地震系数为条件的新场地分类方案。需要强调的是，所提出的场地分类系统和场地系数与新的弹性响应谱相结合，大大减少了计算场地响应分析输出的残差。