Effects of Pulse-Like Ground Motions Parameters on Inter-Story Drift Spectra

Bakhtiyar Ghanbari(1*), Sadegh Khosravi(2), Amir Hoshang Akhaveissy(3)

(1) Ministry of Roads & Urban Development, Iran, Islamic Republic of
(2) Department of University Ottawa, Canada
(3) Department of Civil Engineering, Faculty Engineering, Razi University, Iran, Islamic Republic of
(*) Corresponding author

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This article attempts to study the effect of various pulse-like ground motion parameters and local site conditions on the linear response of different multi-story buildings with special shear and flexural behavior. A total of 61 near-fault pulse-like ground motions are selected for this study. The effects of peak ground velocity (PGV), PGV/PGA, rupture distance, arias intensity, earthquake magnitude and local site conditions on maximum inter-story drift spectra (MIDS) and distribution of the inter-story drift ratio (IDR) along the height of the multi-story buildings are evaluated. The multi-story buildings are modeled using a combination of a shear and flexural beams with representative lateral stiffness ratios. It was observed that both the fundamental period of the structure and the lateral stiffness ratio can significantly change maximum inter-story drift demands in buildings subjected to pulse-like ground motions. The near-fault pulse-like ground motions are more dangerous for multi-story buildings with Flexural behavior than those with shear behavior. The effects of PGV and arias intensity (I) on maximum inter-story drift spectra is more obvious than other parameters.
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Pulse-Like Ground Motion; Multi-Story Buildings; Inter-Story Drift

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