Comparative study of seismic structural response to real and spectrum matched ground motions

Developing the concept of performance based analysis and design has madenonlinear dynamic analysis an ecient method for quantication of the seismic responseof structures. generally, this analysis is done utilizing accelerograms, which are groundmotions obtained from earthquakes. this research is focused on assessing the seismicstructural response of a comprehensive set of reinforced concrete moment resisting framesunder excitation of real accelerograms and ground motions that are spectrally matchedto a target spectrum. the matching process is conducted in the time domain, andthe asce 7-05 spectrum is used as the target spectrum. comparisons are providedfor a number of ground motion parameters and the eect of spectrum matching hasbeen investigated. additionally, the variation of structural response and the degree ofcompatibility and conservation of real and spectrally matched ground motions have beenextensively discussed. it is shown that spectrum compatibilization eectively decreasesthe variation of structural response. however, the measure of observed bias thoroughlydepends on the height of the structure. finally, fragility curves of structural performanceare provided and it is indicated that consideration of modeling uncertainties results inobtaining a fragility curve with reasonable resemblance to that obtained from real groundmotions.