ABSTRACT

The site fundamental period plays a key role in the characterization of site conditions to construct design spectrum models. For layered soil profiles on bedrock, it is generally believed that radiation damping caused by energy leaking into the bedrock does not change the fundamental period. This study finds that radiation damping can significantly affect the fundamental period. The effect of radiation damping on the site fundamental period is systematically studied, and a simple method for the fundamental period of linear soil profiles considering radiation damping is proposed. The validity of the proposed method is demonstrated using many actual soil profiles.

中文翻译：

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辐射阻尼对线性土壤剖面基本周期的影响

摘要

场地基本周期在表征场地条件以构建设计谱模型中起着关键作用。对于基岩上的层状土壤剖面，一般认为能量泄漏到基岩中引起的辐射阻尼不会改变基本周期。这项研究发现，辐射阻尼可以显着影响基本周期。系统研究了辐射阻尼对场地基本周期的影响，提出了一种考虑辐射阻尼的线性土剖面基本周期的简便计算方法。使用许多实际的土壤剖面证明了所提出方法的有效性。