The Effect of Energy Concentration of Earthquake Ground Motions on the Nonlinear Response of RC Structures

H Cao (Chongqing University, PR China) & MI Friswell (University of Bristol)

Soil Dynamics and Earthquake Engineering, Vol. 29, No. 2, February 2009, pp. 292-299

Abstract

Usually different nonlinear time responses due to earthquake ground motion are distinguished by non-localized spectra, such as the response or power spectra. However these spectra are often not able to explain the large discrepancy among structural responses caused by different earthquake records. The local spectrum, obtained by the wavelet transform, shows the energy distribution in the time-frequency domain, and helps to understand the very different structural responses. By changing the energy distribution in time of several earthquake records, the effect of energy concentration on the structural nonlinear response is demonstrated. This paper proposes the use of the characteristic peak ground acceleration, which is the peak of the signal constructed by only a few special wavelet components of an earthquake record, to quantify the difference between earthquake records, since this measure indicates the magnitude of the energy concentrated around the fundamental period of a structure.

Paper Availability

This material has been published in the Soil Dynamics and Earthquake Engineering, Vol. 29, No. 2, February 2009, pp. 292-299. Unfortunately the copyright agreement with Elsevier does not allow for the PDF file of the paper to be available on this website. However the paper is available from ScienceDirect - see below.


Link to paper using doi:10.1016/j.soildyn.2008.02.003

Link to Soil Dynamics and Earthquake Engineering on ScienceDirect



Discussion of this paper by Abbas Moustafa

Discussion of 'The effect of energy concentration of earthquake ground motions on the nonlinear response of RC structures' by H. Cao, M.I. Friswell by Abbas Moustafa. Soil Dynamics and Earthquake Engineering, 29(7), 1181-1183, 2009.


Link to discussion using doi: 10.1016/j.soildyn.2009.02.004


Authors' Reply

Discussion by Abbas Moustafa of 'The effect of energy concentration of earthquake ground motions on the nonlinear response of RC structures', Soil Dynamics and Earthquake Engineering, 2009, 29 (2), 292-299, Soil Dynamics and Earthquake Engineering, 29(7), 1184-1185, 2009.


Link to reply using doi: 10.1016/j.soildyn.2009.02.007