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Introduction of conditional mean spectrum and conditional spectrum in the practice of seismic safety evaluation in China

Authors
  • Ji, Kun1, 2
  • Bouaanani, Najib2
  • Wen, Ruizhi1
  • Ren, Yefei1
  • 1 China Earthquake Administration, Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics,, No. 29 Xuefu Road, Harbin, Heilongjiang, 150080, People’s Republic of China , Harbin (China)
  • 2 Polytechnique Montréal, Department of Civil, Geological and Mining Engineering, Montreal, H3C 3A7, Canada , Montreal (Canada)
Type
Published Article
Journal
Journal of Seismology
Publisher
Springer-Verlag
Publication Date
May 04, 2018
Volume
22
Issue
4
Pages
1005–1024
Identifiers
DOI: 10.1007/s10950-018-9747-8
Source
Springer Nature
Keywords
License
Yellow

Abstract

This paper aims at implementing and introducing the use of conditional mean spectrum (CMS) and conditional spectrum (CS) as the main input parameters in the practice of seismic safety evaluation (SSE) in China, instead of the currently used uniform hazard spectrum (UHS). For this purpose, a procedure for M-R-epsilon seismic hazard deaggregation in China was first developed. For illustration purposes, two different typical sites in China, with one to two dominant seismic zones, were considered as examples to carry out seismic hazard deaggregation and illustrate the construction of CMS/CS. Two types of correlation coefficients were used to generate CMS and the results were compared over a vibration period range of interest. Ground motion records were selected from the NSMONS (2007–2015) and PEER NGA-West2 databases to correspond to the target CMS and CS. Hazard consistency of the spectral accelerations of the selected ground motion records was evaluated and validated by computing the annual exceedance probability rate of the response spectra and comparing the results to the hazard curve corresponding to each site of concern at different periods. The tools developed in this work and their illustrative application to specific case studies in China are a first step towards the adoption of CMS and CS into the practice of seismic safety evaluation in this country.

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