Comparison of three different methods in investigating shallow shear-wave velocity structures in Ilan, Taiwan

NCU Institutional Repository > 地球科學學院 > 地球物理研究所 > 期刊論文 > Item 987654321/27519

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/27519

题名:	Comparison of three different methods in investigating shallow shear-wave velocity structures in Ilan, Taiwan
作者:	Kuo,CH;Cheng,DS;Hsieh,HH;Chang,TM;Chiang,HJ;Lin,CM;Wen,KL
贡献者:	地球物理研究所
关键词:	AMBIENT NOISE;ARRAY MEASUREMENTS;JOINT INVERSION;H/V SPECTRUM;MICROTREMOR;BASIN
日期:	2009
上传时间:	2010-06-29 18:40:12 (UTC+8)
出版者:	中央大學
摘要:	The Central Weather Bureau (CWB) and National Center for Research on Earthquake Engineering (NCREE) launched a project to build an engineering geological database for strong-motion stations in Taiwan in 2000. The project measures shear-wave velocity using the suspension PS-logging method. In this study, we conduct array measurements of microtremors and apply the stress wave propagation method (SWPM) at seven free-field strong-motion stations in Ilan County to estimate shallow shear-wave velocity structures. We focus on the sediment layers of the top 100 in to compare the shear-wave velocity structures of the three different methods. There are some misfits among the results of the three different methods; so we calculate the values of Vs(30), Vs(100) and plot S-wave travel-time curves of these methods for each site to analyze the misfits effectively. This analysis helped us to prove the efficiency of the microtremor array method in investigating shear-wave velocity structures in the shallow subsurface. Moreover, the horizontal-to-vertical ratios of microtremors for each survey point show the existence of divergence at the same site. We considered this as evidence that misfits arc caused by the heterogeneous nature of sediments and also due to the nature of the methods as being one-, two- and three-dimensional. Furthermore, the average shear-wave velocity structure of microtremor arrays may be more representative of the whole site. (C) 2008 Elsevier Ltd. All rights reserved.
關聯:	SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
显示于类别:	[地球物理研究所] 期刊論文

文件中的档案:

档案	描述	大小	格式	浏览次数
index.html		0Kb	HTML	556	检视/开启

在NCUIR中所有的数据项都受到原著作权保护.

社群 sharing

数据加载中.....