NGA模型在芦山地震区的适用性

doi:10.13722/j.cnki.jrme.2014.1374

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Abstract The Mw6.7 Lushan earthquake on April 20，2013 provided the opportunity to validate the applicability of American Next Generation Attenuation Relationship(NGA-West 1 and NGA-West 2 model). A total of 42 free-field strong-motion recordings within the rupture distance of 200 km were used in this study. Firstly we established an empirical attenuation relationship for the peak ground acceleration and spectral acceleration. The residuals analysis shows that the model can properly reflect the attenuation tendency of the parameters. It was found that the NGA models underestimate the parameters slightly in short period less than 0.2 s，overestimate significantly in long period over 1 s. Compared with the NGA-West 1 model，the NGA-West 2 model not only performs better for the discreteness of short period spectral acceleration，but also reduces the residuals in long period

Key words： geomechanics Lushan earthquake NGA model ground motion

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	Articles by authors
	JI Kun
	WEN Ruizhi
	REN Yefei
	WANG Hongwei
	HUANG Xutao

Cite this article:

JI Kun,WEN Ruizhi,REN Yefei, et al. Applicability of the NGA model in Lushan earthquake region[J]. , 2016, 35(S1): 2990-2999.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.1374 OR https://rockmech.whrsm.ac.cn/EN/Y2016/V35/IS1/2990

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