A Study on the Interrelation of Seismic Intensity Parameters and Damage Indices of Structures Under Mainshock-Aftershock Seismic Sequences

Abstract eng:
The interrelation between seismic intensity parameters and the postseismic damage state of structures is investigated, with respect to mainshock-aftershock sequence-type ground motions. Several peak, energy, and spectral intensity parameters are implemented to describe the seismic damage potential. Overall structural damage indices (OSDIs) are used to designate the postseismic damage status of buildings. The interrelation between the seismic intensity parameters and the OSDIs is quantified by the Pearson correlation coefficient and by the Spearman rank correlation coefficient. The proposed procedure has been applied to a reinforced concrete structure. Following the design procedure, nonlinear dynamic analyzes are conducted to deliver the seismic structural response. The present investigation utilizes 75 natural accelerograms, recorded worldwide in regions with strong seismic activity. All the records are mainshock-aftershock seismic sequences. The numerical results show that the examined damage indices exhibit strong interrelation and the same degree of correlation to the examined seismic parameters. Analytical examination shows that both, the energy and the spectral seismic intensity parameters have the strongest correlation with the OSDIs while the peak seismic intensity parameters and the strong motion duration defined by Trifunac and Brady exhibit poor correlation with the OSDIs.

• Export as: BibTeX | MARC | MARCXML | DC | EndNote | NLM | RefWorks
• Add to your basket