This paper deals with the well-known problem of generating spectrum-compatible synthetic accelerograms for the linear and non-linear time-history analyses of structural systems. A wavelet-based procedure has been used to decompose a recorded accelerogram into a desired number of time-histories with non-overlapping frequency contents, and then each of the time-histories has been suitably scaled for matching of the response spectrum of the revised accelerogram with a specified design spectrum. The key idea behind this iterative procedure is to modify a recorded accelerogram such that the temporal variations in its frequency content are retained in the synthesized accelerogram. The proposed procedure has been illustrated by modifying five recorded accelerograms of widely different characteristics such that those are compatible with the same USNRC design spectrum.
[1]
V. Gupta,et al.
ON THE CHARACTERISATION OF THE PHASE SPECTRUM FOR STRONG MOTION SYNTHESIS
,
2001
.
[2]
B. Basu,et al.
Wavelet-Based Analysis of the Non-Stationary Response of a Slipping Foundation
,
1999
.
[3]
B. Basu,et al.
SEISMIC RESPONSE OF SDOF SYSTEMS BY WAVELET MODELING OF NONSTATIONARY PROCESSES
,
1998
.
[4]
Joel P. Conte,et al.
Fully nonstationary analytical earthquake ground-motion model
,
1997
.
[5]
B. Basu,et al.
Wavelet‐based non‐stationary response analysis of a friction base‐isolated structure
,
2000
.
[6]
Mihailo D. Trifunac,et al.
Generation of artificial strong motion accelerograms
,
1979
.