Bi-normalized response spectral characteristics of the 1999 Chi-Chi earthquake |
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Authors: | Email author" target="_blank">Xu?LongjunEmail author Xie?Lili |
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Affiliation: | School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China;School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China;Institute of Engineering Mechanics, China Seismological Bureau, Harbin 150080, China |
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Abstract: | To develop uniform and seismic environment-dependent design spectrum, common acceleration response spectral characteristics
need to be identified. In this paper, a bi-normalized response spectrum (BNRS) is proposed, which is defined as a spectrum
of peak response acceleration normalized with respect to peak acceleration of the excitation plotted vs. the natural period
of the system normalized with respect to the spectrum predominant period,Tp. Based on a statistical analysis of records from the 1999 Chi-Chi earthquake, the conventionally normalized response spectrum(NRS)
and the BNRS are examined to account for the effects of soil conditions, epicentral distance, hanging wall and damping. It
is found that compared to the NRS, the BNRS is much less dependent on these factors. Finally, some simple relationships between
the BNRS for a specified damping ratio and that for a damping ratio of 5%, and between the spectra predominant period and
epicentral distance for different soil types are provided.
Supported by: Heilongjiang Natural Science Foundation Under Project No. ZGJ03-03 and the Research Fund for the Doctoral Program
of Higher Education of China Through Project No. 20030213042 |
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Keywords: | earthquake design spectra normalized response spectrum bi-normalized response spectrum spectral predominant period Chi-Chi earthquake |
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