Dynamic responses under the excitation of pulse sequences |
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Authors: | Email author" target="_blank">Dai?JunwuEmail author Mai?Tong George?C?Lee Qi?Xiaozhai Bai?Wenting |
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Institution: | Institute of Engineering Mechanics, China Earthquake Administration.Harbin 150080, China;Multidisciplinary Center.for Earthquake Engineering Research, University at Buffalo, Buffalo, NY, 14261, USA |
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Abstract: | This paper studies the dynamic responses of SDOF system under pulse-dominant excitations. The purpose of the study is to prepare
for scrutiny of some near-field pulse-dominant ground motions and their potential to cause structural damage. Extending the
single pulse dynamics, we consider the effect of pulse sequences. This kind of excitation was particularly obvious in some
of previous earthquakes such as Northridge (1994) and Chi-Chi (1995). Based on the duration, peak and rise and decay era of
the main pulse as well as its relationship with the predecessor and successor pulses, we propose a classification for the
pulse sequences. Consequent studies have been carried out for acceleration, velocity and displacement response spectra of
the main pulse with either a predecessor or a successor pulse. The analysis also includes general response behaviors in different
fundamental period segments and special aspects of response at certain points (e.g., the corresponding peak points).
Supported by: US NSF Under Grant No. CMS-0202846; National Natural Science Foundation of China Under Grant No. 50278092 |
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Keywords: | pulse sequences near-field ground motions triangle pulse representation Chi-Chi earthquake response spectra |
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