气候变化领域集成服务门户(CCPortal): Prediction of different depth amplifications of deep soil sites for potential scenario earthquakes

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DOI	10.1007/s11069-021-04670-4
	Prediction of different depth amplifications of deep soil sites for potential scenario earthquakes
	Anbazhagan P.; Joo M.R.; Rashid M.M.; Al-Arifi N.S.N.
发表日期	2021
ISSN	0921030X
起始页码	1935
结束页码	1963
卷号	107 期号:2
英文摘要	Deep soil basin is one of the geographical features which significantly alter the response to earthquakes. Around the world, there are regions where bedrock is at a substantial depth upon which are different layers of soil. Larger depths of soil alter the response toward earthquakes and have been reported in the past. Indo-Gangetic Basin (IGB) of India is one of the seismically vulnerable deep soil basins of the Asian continent. The present paper attempts to study the site amplifications in IGB at the surface and different depths to understand the amplification behavior of the deep soil basins worldwide. Sixteen different probable scenario earthquakes are identified based on past seismic gaps, history and seismic studies and simulated at 270 sites covering whole deep soil region of the IGB. Representative depths of input motion, density, shear wave velocity, location of the water table, suitable shear modulus reduction and damping curves have been used. One-dimensional nonlinear site response analysis was carried out using DEEPSOIL. Peak ground acceleration (PGA), peak spectral acceleration (PSA), amplification factors using the ratio of zero period, peak spectral acceleration, site factors Fa and Fv as per the National Earthquake Hazards Reduction Programme (NEHRP) and spectral accelerations at specific periods of 0.2 and 1 s are calculated and deliberated at the surface and also at different layers up to 100 m depth. Maps for spatial variation in average and maximum values of amplification as well as site factors have been presented. Average values of FPGA, FPSA, Fa and Fv at the surface were found in the range of 1.16–7.94, 1.13–7.93, 1.43–7.89 and 2.11–7.51, respectively. Around 14% of sites in the IGB have amplification values at subsurface levels exceeding those at corresponding surface levels. Amplifications observed at the subsurface level are less than that of the surface for a considerable number of sites. © 2021, The Author(s), under exclusive licence to Springer Nature B.V.
关键词	Fa FPGA FPSA Fv Indo-Gangetic Basin PGA PSA Seismic amplification Site factors Site response studies Spectral amplification
英文关键词	amplification; depth; earthquake mechanism; peak acceleration; prediction; seismic response; site effect; soil analysis; spatial variation; India
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206077
作者单位	Department of Civil Engineering, Indian Institute of Science, Bangalore, 560012, India; Department of Civil Engineering, National Institute of Technology, Srinagar, 190006, India; Geology and Geophysics Department, Faculty of Science, King Saud University, Riyadh, 11451, Saudi Arabia
推荐引用方式 GB/T 7714	Anbazhagan P.,Joo M.R.,Rashid M.M.,et al. Prediction of different depth amplifications of deep soil sites for potential scenario earthquakes[J],2021,107(2).
APA	Anbazhagan P.,Joo M.R.,Rashid M.M.,&Al-Arifi N.S.N..(2021).Prediction of different depth amplifications of deep soil sites for potential scenario earthquakes.Natural Hazards,107(2).
MLA	Anbazhagan P.,et al."Prediction of different depth amplifications of deep soil sites for potential scenario earthquakes".Natural Hazards 107.2(2021).