Study on applicability of response spectra in chinese code

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Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (11) : 79-84.

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Study on applicability of response spectra in chinese code

Cao Jia-liang1; Shi Wei-xing1; Wang Yang3;

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Abstract

Applicability of response spectra was investigated based on study of damping reduction factors and pseudo relative displacement spectra of ‘Code for seismic design of buildings' (GB 50011). On the basis of damping mechanism, it is found that except for reducing relative displacement spectra value effectively, the higher damping ratio may also amplify the absolute acceleration spectra value of building structures, rather than attenuate it all the time. In this case, comparison of seismic influence coefficient curves, damping reduction factors and pseudo relative displacement spectra varying from different site classes and damping ratios between Code (GB 50011-2010) and Code (GB 50011-2001) were performed. Besides, problems which should be noticed during the process of generating artificial seismic wave as input of time-history analysis of long-period structures with high damping ratio such as seismic-isolation structures or seismic-energy-dissipating structures were pointed out.

Key words

response spectrum / displacement response spectrum / damping reduction factors / Code for seismic design of buildings / artificial seismic wave / time-history analysis

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Cao Jia-liang;Shi Wei-xing;Wang Yang;. Study on applicability of response spectra in chinese code [J]. Journal of Vibration and Shock, 2011, 30(11): 79-84