Investigations in site response from ground motion observations in vertical arrays
- 出版日期：2000.
- 页数：189 p. :
- 第一责任说明：Laurie Gaskins Baise.
- 分类号：a263.7
- ISBN：0493112790(ebk.) :
MARC全文
02h0020880 20101216110531.0 cr un||||||||| 101022s2000 xx ||||f|||d||||||||eng | 0493112790(ebk.) : CNY371.35 (UnM)AAI3002619 UnM UnM NGL a263.7 Baise, Laurie Gaskins. Investigations in site response from ground motion observations in vertical arrays [electronic resource] / Laurie Gaskins Baise. 2000. 189 p. : digital, PDF file. Source: Dissertation Abstracts International, Volume: 62-01, Section: B, page: 0398. ; Chair: Steven D. Glaser. Thesis (Ph.D.) -- University of California, Berkeley, 2000. The aim of the research is to improve the understanding of earthquake site response and to improve the techniques available to investigate issues in this field. Vertical array ground motion data paired with the empirical transfer function (ETF) methodology is shown to accurately characterize site response. This manuscript draws on methods developed in the field of signal processing and statistical time series analysis to parameterize the ETF as an autoregressive moving-average (ARMA) system which is justified theoretically, historically, and by example.;Site response is evaluated at six sites in California, Japan, and Taiwan using ETF estimates, correlation analysis, and full waveform modeling. Correlation analysis is proposed as a required data quality evaluation imperative to any subsequent site response analysis. ETF estimates and waveform modeling are used to decipher the site response at sites with simple and complex geologic structure, which provide simple time-invariant and time-variant methods for evaluating both linear site transfer functions and nonlinear site response for sites experiencing liquefaction of the soils. The Treasure and Yerba Buena Island sites, however, require 2-D waveform modeling to accurately evaluate the effects of the shallow sedimentary basin.;ETFs are used to characterize the Port Island site and corresponding shake table tests before, during, and after liquefaction. ETFs derived from the shake table tests were demonstrated to consistently predict the linear field ground response below 16 m depth and the liquefied behavior above 15 m depth. The liquefied interval response was demonstrated to gradually return to pre-liquefied conditions within several weeks of the 1995 Hyogo-ken Nanbu earthquake. Both the site's and the shake table test's response were shown to be effectively linear up to 0.5 g in the native materials below 16 m depth.;The effective linearity of the site response at GVDA, Chiba, and Lotting up to 0.1 g, 0.33 g, and 0.49 g, respectively, further confirms that site response in the field may be more linear than expected from laboratory tests. Strong motions were predicted at these sites with normalized mean square error less than 0.10 using ETFs generated from weak motions.;The Treasure Island site response was shown to be dominated by surface waves propagating in the shallow sediments of the San Francisco Bay. Low correlation of the ground motions recorded on rock at Yerba Buena Island and in rock beneath the Treasure Island site intimates that the Yerba Buena site is an inappropriate reference site for Treasure Island site response studies. Accurate simulation of the Treasure Island site response was achieved using a 2-D velocity structure comprised of a 100 m uniform soil basin (Vs = 400 m/s) over a weathered rock veneer (Vs = 1.5 km/s) to 200 m depth. Earthquake hazard analysis. ; Earthquake engineering. aGlaser, Steven D. aCN bNGL http://proquest.calis.edu.cn/umi/detail_usmark.jsp?searchword=isbn%3D0493112790&singlesearch=no&channelid=%CF%B8%C0%C0&record=1 NGL Bs692 rCNY371.35 ; h1 xhbs1003