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DOI	10.1080/19386362.2015.1113354
	Input ground motions for earthquake site response analyses: deep sediment column with cementation
	Lamichhane, Suchan; Luke, Barbara
通讯作者	Lamichhane, S
来源期刊	INTERNATIONAL JOURNAL OF GEOTECHNICAL ENGINEERING
ISSN	1938-6362
EISSN	1939-7879
出版年	2016
卷号	10 期号:2 页码:190-204
英文摘要	Earthquake ground motions (GMs) are developed for input to structural response analyses of a highway bridge in Las Vegas, Nevada (southwestern US), an area of arid climate and moderate seismicity. A target response spectrum for rock-outcrop (` bedrock') motions at the site is produced from a probabilistic seismic hazard analysis and GMs are found that are compatible with the target. Three approaches to generate input GMs are tested: a set of unscaled real (natural) GMs, a set of scaled real GMs, and a single, spectrally-matched GM. The input motions are filtered through a representative sediment column, nearly 400 m deep, to produce surface GMs. Both nonlinear and equivalent-linear analyses are conducted. The sediment column tended to deamplify short-period motions while amplifying long-period motions and shifting peak response to longer period, as expected. For nonlinear analysis, all three approaches to generating the input GMs yielded acceptable results. The single, spectrally-matched GM yielded the highest spectral accelerations. To explore effects of a heavily cemented layer (caliche) on site response, an alternative profile is tested. The 30-m depth-averaged shear wave velocity is unchanged, but a thick caliche layer is inserted just beneath it. In a third test, the caliche profile is truncated at the stiff inclusion. Only the nonlinear analyses showed effects of the caliche. The shallow profile predicted the highest amplification by far, demonstrating how consideration of only the upper 30 m of a sediment column can significantly overpredict short-period response.
英文关键词	Earthquake site response Deep sediment Earthquake ground motions Scaling of ground motions Wavelet-adjusted spectrum-matching Las Vegas Stiff inclusion Caliche
类型	Article
语种	英语
收录类别	ESCI
WOS记录号	WOS:000372583800011
WOS关键词	LAS-VEGAS VALLEY ; DYNAMIC-ANALYSIS ; ACCELEROGRAMS ; SELECTION ; DURATION ; RECORDS ; NEVADA
WOS类目	Engineering, Geological
WOS研究方向	Engineering
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/331506
作者单位	[Lamichhane, Suchan] Terracon Consultants Inc, 1505 Old Happy Jack Rd, Cheyenne, WY 82001 USA; [Luke, Barbara] Univ Nevada, Dept Civil & Environm Engn & Construct, 4505 S Maryland Pwky, Las Vegas, NV 89154 USA
推荐引用方式 GB/T 7714	Lamichhane, Suchan,Luke, Barbara. Input ground motions for earthquake site response analyses: deep sediment column with cementation[J],2016,10(2):190-204.
APA	Lamichhane, Suchan,&Luke, Barbara.(2016).Input ground motions for earthquake site response analyses: deep sediment column with cementation.INTERNATIONAL JOURNAL OF GEOTECHNICAL ENGINEERING,10(2),190-204.
MLA	Lamichhane, Suchan,et al."Input ground motions for earthquake site response analyses: deep sediment column with cementation".INTERNATIONAL JOURNAL OF GEOTECHNICAL ENGINEERING 10.2(2016):190-204.