基岩
地质学
选址
水文地质学
剪切(地质)
波速
地貌学
大地测量学
地震学
岩土工程
物理
古生物学
核物理学
作者
Bhavesh Pandey,Ravi S. Jakka
出处
期刊:Natural Hazards
[Springer Nature]
日期:2022-02-25
卷期号:112 (3): 2167-2195
被引量:1
标识
DOI:10.1007/s11069-022-05260-8
摘要
The selection of half-space or reference sites significantly influences site amplification studies. However, there are no well-defined guidelines in the literature. Generally, a layer with a local shear wave velocity (VS) of more than 760 m/s is considered a bedrock/half-space/reference site. This study attempts to formulate a rationale for selecting bedrock stiffness to be used as a half-space/reference site. For this study, VS,30 (average shear wave velocity of top 30-m soil strata from shear wave velocity measurements) and the site’s fundamental frequency (obtained from horizontal-to-vertical spectral ratio of ambient vibration records) were used as proxies to study the influence of bedrock/half-space and development of a rationale for their selection. This study uses strong-motion data from India’s sixty-two strong-motion stations and a few from Japan (Kik-Net). The results suggest that considering a site with a shear wave velocity of 760 m/s may not be suitable as a half-space/bedrock for most geomorphological conditions. The results also recognize a pattern that can help in the development of a mathematical model for determining the bedrock for a site using VS,30 and its fundamental frequency as a proxy.
科研通智能强力驱动
Strongly Powered by AbleSci AI