Abstract
This paper represents the effectiveness of the bracing system concerning the seismic performance of steel-concrete composite buildings by comparing 5-storey composite buildings with and without bracings subject to extreme earthquake loads. The nonlinear time history analysis (NTHA) is carried out on the specific building models considered for this study. The seismic response is obtained in terms of different seismic response parameters which are further compared to determine the effect of the bracing system. The results obtained by applying real earthquake records of different near-field & far-field earthquakes were compared for three earthquake response parameters which include base shear, inter-storey drifts, and storey displacements. The bracing system is very effective in resisting the seismic force when subjected to extreme earthquakes as it increases the overall stiffness of the building. The bracing system improves the overall performance of the composite building by reducing the inter-storey drifts and maximum storey displacement under extreme earthquakes.
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