Investigation of seismic behavior of steel structures using response spectrum analysis

Seismic behavior of steel structures in earthquake zones should be well known. This study investigates the seismic behavior of steel structures with different types of steel bracing using response spectrum analysis. To find and search the best performance, we use several concentrically bracing types in different locations. In this study, 30 and 50 storey moment resisting frame models and structures retrofitted with different type of bracing in different locations discussed, their behavior under the dynamic loads were analyzed and their lateral displacements were compared. Data were collected and evaluated by using the Sap 2000 computer program and by using the response spectrum analysis according to TEC 2007 (Turkish Earthquake Code 2007) principles. The results show that the position and type of steel braces members significantly affect the displacement and base reactions of the structure under dynamic loads. The results of this study will assist engineers in investigating the best steel brace type and it's positioning in structural geometry to keep lateral displacements of high-rise steel structures under dynamic loads at low levels using the response spectrum method.