Paper Title:
Free-Field Surface Ground Motion Properties of Stratified Soils
  Abstract

In earthquake engineering, the conventional wave motion analyses usually took the subsoil as only one layered soil, and treated the subsoil by using a single freedom system model. Moreover, these methods were often adopted in time domain. In fact, the subsoil are usually stratified due to its forming in different ages, so there exist multiple interfaces which leads to multiple repeated tracings of reflecting and refracting waves in time domain analysis. To avoid the difficulties, a frequency domain analysis method is carried out for linear soil system in this paper, which allows combining all the upward waves and downward waves to a single upward wave and a single downward wave, respectively, and therefore raises great efficiency. The stochastic response analysis of the displacement of layered soils is then performed. The result indicates that, there exists the essential difference in power spectral density (PSD) between stratified soils and single-layer soil, the former has multiple peak values, while the later has only one peak value, and stratified soils have strong filtering effect in high frequency ranges, which can be considered as a low-pass filter.

  Info
Periodical
Advanced Materials Research (Volumes 243-249)
Edited by
Chaohe Chen, Yong Huang and Guangfan Li
Pages
3893-3898
DOI
10.4028/www.scientific.net/AMR.243-249.3893
Citation
Z. Z. Wang, L. Y. Jiang, "Free-Field Surface Ground Motion Properties of Stratified Soils", Advanced Materials Research, Vols. 243-249, pp. 3893-3898, 2011
Online since
May 2011
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Price
$32.00
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