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Ideal-Pulse-Based Strong-Motion Duration for Multi-Pulse Near-Fault Records.

Authors :
Xiao-yu Chen
Dong-sheng Wang
Rui Zhang
Zhi-guo Sun
Wei Guo
Binbin Li
Source :
Bulletin of the Seismological Society of America; Dec2023, Vol. 113 Issue 6, p2703-2717, 15p
Publication Year :
2023

Abstract

Serious damage to near-fault structures is caused mainly by velocity pulses in a ground motion, hence, the necessity to develop a pulse-related definition of strong-motion duration to adequately describe the intensity of near-fault ground motion. For a multipulse record, an ideal-pulse-based strong-motion duration, which is defined as the time interval between the beginning of the first pulse and the end of the last pulse in an ideal-pulse signal, is proposed. This strong-motion duration corresponds with the time interval of the occurrence of strong vibrations and energy accumulations in the original record. For near-fault records, pulselike characteristics can be completely presented within this duration. Meanwhile, the ideal-pulse-based strong-motion duration shows good performance in the estimation of structural responses. The elastic and inelastic displacement spectra of the original records agree well with those of the records shortened according to the proposed duration. The validity of applying the proposed duration to structural analysis is further verified by the nonlinear time history analyses of 3-, 9-, and 20-story steel moment-resisting frame structures. The proposed strong-motion duration accurately estimates nonlinear structural responses. It is proven that the ideal-pulse-based strong-motion duration can adequately describe the intensity of near-fault ground motions, both from the perspective of the energy accumulation process in a ground-motion record and that of the structural analyses subjected to these ground motions. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00371106
Volume :
113
Issue :
6
Database :
Supplemental Index
Journal :
Bulletin of the Seismological Society of America
Publication Type :
Academic Journal
Accession number :
173884935
Full Text :
https://doi.org/10.1785/0120220261