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International Journal of Geophysics
Volume 2012 (2012), Article ID 461863, 10 pages
http://dx.doi.org/10.1155/2012/461863
Research Article

Seismic Hazard Assessment for the Tianshui Urban Area, Gansu Province, China

1Kentucky Geological Survey, University of Kentucky, Lexington, KY, USA
2Department of Earth and Environmental Sciences, University of Kentucky, Lexington, KY, USA
3Lanzhou Institute of Seismology, China Earthquake Administration, Gansu, Lanzhou, China

Received 4 May 2012; Revised 27 July 2012; Accepted 14 August 2012

Academic Editor: Vladimir G. Kossobokov

Copyright © 2012 Zhenming Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A scenario seismic hazard analysis was performed for the city of Tianshui. The scenario hazard analysis utilized the best available geologic and seismological information as well as composite source model (i.e., ground motion simulation) to derive ground motion hazards in terms of acceleration time histories, peak values (e.g., peak ground acceleration and peak ground velocity), and response spectra. This study confirms that Tianshui is facing significant seismic hazard, and certain mitigation measures, such as better seismic design for buildings and other structures, should be developed and implemented. This study shows that PGA of 0.3 g (equivalent to Chinese intensity VIII) should be considered for seismic design of general building and PGA of 0.4 g (equivalent to Chinese intensity IX) for seismic design of critical facility in Tianshui.