Dynamic Analysis of a Tall Unsymmetrical Building Frame Considering Effect of Infill Masonry and Steel Bracing System

In a country like India, where population is growing rapidly with development of the nation, this is resulting in lack of space ultimately asking for tall structures in order to create space for every individual. Some parts of India are under seismic zone V, which needs utmost care and safety, thus there is a need of lateral load resisting members in a tall structures. In this study we are analyzing a G+12 tall structure, considering seismic zone V (response spectrum method) with soft soil condition, for analysis and modelling, ETABS'17 is used. Here we are considering infill masonry wall frame and steel bracing system frame for comparison. The steel bracing system and Infill masonry in reinforced concrete frames is viable for resisting lateral forces, steel bracing is easy to erect occupies less space and has flexibility in design for meeting the required strength and stiffness whereas Infill masonry is easy to assign with unskilled labors. In this comparative study, it is concluded that Steel bracing at exterior shows desirable stability than other cases in terms of resisting forces and moment. Also, in terms of cost effectiveness steel bracing system is quite suitable for lateral load resisting whereas Infill masonry structure is second alternate whereas bare frame case shows worst result. Therefore, it can be justifying that steel bracing frame is overall more stable than bare frame.