Seismic design factors for RC special moment resisting frames in Dubai, UAE |
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| Authors: | Mohammad AlHamaydeh Sulayman Abdullah Ahmed Hamid Abdilwahhab Mustapha |
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| Institution: | Department of Civil Engineering, American University of Sharjah, UAE |
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| Abstract: | This study investigates the seismic design factors for three reinforced concrete (RC) framed buildings with 4, 16 and 32-stories
in Dubai, UAE utilizing nonlinear analysis. The buildings are designed according to the response spectrum procedure defined
in the 2009 International Building Code (IBC’09). Two ensembles of ground motion records with 10% and 2% probability of exceedance
in 50 years (10/50 and 2/50, respectively) are used. The nonlinear dynamic responses to the earthquake records are computed
using IDARC-2D. Key seismic design parameters are evaluated; namely, response modification factor (R), deflection amplification factor (C
d), system overstrength factor (Ω
o), and response modification factor for ductility (R
d
) in addition to inelastic interstory drift. The evaluated seismic design factors are found to significantly depend on the
considered ground motion (10/50 versus 2/50). Consequently, resolution to the controversy of Dubai seismicity is urged. The
seismic design factors for the 2/50 records show an increase over their counterparts for the 10/50 records in the range of
200%–400%, except for the Ω
o factor, which shows a mere 30% increase. Based on the observed trends, perioddependent R and C
d factors are recommended if consistent collapse probability (or collapse prevention performance) in moment frames with varying
heights is to be expected. |
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| Keywords: | Seismic design factors reinforced concrete special moment resisting frame Dubai UAE |
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