الفهرس 
Title : Numerical evaluation of response modification factor for RC structures under the effect of vertical and horizontal ground motions
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Abstract
This research aims to evaluate the response modification factor for reinforced concretestructure with ductile moment resisting frames system, which was designed according to the Egyptian Code of Practice (ECP) under the effect of vertical and horizontal ground motions.A non-linear dynamic analysis is performed using the Extreme Loading for Structures (ELS®) software which based on the Applied Element Method (AEM).The values of (R) factor were evaluated under the effect of the vertical ground acceleration, combined vertical and horizontal ground accelerations, concrete compressive strength and reinforcement grades defined by (ECP). The obtained values of (R) factor from the numerical analysis were compared to the values defined by (ECP), the Euro Code (EC8), the American Codes (ASCE) and (UBC97)