SEISMIC BEHAVIOR OF STEEL MOMENT RESISTING FRAMES ASSOCIATED WITH RC SHEAR WALLS

Abstract

In this paper, the influence of increasing the height of building on the seismic behaviorof dual structural systems in the form of steel moment resisting frames accompanied withreinforced concrete shear walls has been investigated. Common structures experience inelasticstage of behavior encountering the seismic loads and the applied energy will be dissipated. Thenonlinear responses of the structural models have been evaluated in this research. As a result, someparameters such as ductility factor of structure (μ), over-strength factor (Rs) and responsemodification factor (R) for the mentioned structures have been studied. To achieve theseobjectives, the buildings have 10 and 20 stories and contain such structural systems used toperform the pushover analyses having different load patterns. Regarding the results, it seems thatthe response modification factor (R) for the mentioned structural system is assumed to be higherthan the value which is used in Iranian Code of Practice for Seismic Resistant Design of Buildings[Standard No.2800]. Analytical results showed that the ductility factor and the responsemodification factor increased as the structure height increased. In contrast, the over-strengthfactors increased by decreasing the height of the structure.