Study and Behaviour of Seismic Load on Soft Storey Building Using Diagonal Bracing with Visco Elastic Damper

Abstract

Tall building construction and developments have been rapidly increasing worldwide Development of metro cities in India there is increasing demand in High Rise Building and it is common to use the effect of masonry infill panel on the response of RC frame subjected to seismic action. In this study the effect of seismic load on soft storey building using diagonal bracing with visco elastic damper wall on high rise building is studied, because the effect of diagonal bracing must be considered for the seismic evaluation of moment resistant reinforced concrete frames Linear analysis is performed on high rise structures with various arrangements, and a G + 19 framed building is modelled for analysis. ETABS software performs all analysis. Base shear, storey displacement, and storey drift are calculated and compared for all models in this software, and the results show that the time period decreases with the incorporation of bracing with viscoelastic damper. Soft storey in high-rise buildings has a significant impact on seismic performance. The variation in floor height causes a discontinuity in the rigidity of the structure at the soft storey level. Soft storeys with varying floor heights. In this way , models are analysed . ETABS software has been used for analysis purpose which results in terms of max moment , max storey , max shear force , displacement , max axial force and drift which are critically analysed to quantify the effect of various parameters . The soft storey building with diagonal steel brace dampers is most effective and economical in seismic active areas Soft stories are subjected to larger lateral loads during earthquakes and under lateral loading. This lateral force cannot be distributed evenly along the structure's height. Because of this, the lateral forces are concentrated on the storey with the greatest displacement. The lateral force distribution along a building's height is directly related to the mass and stiffness of each storey. As a result, the dynamic analysis procedure provides more accurate distribution results of earthquake and lateral forces, as well as building height, determining the modal effects and local ductility in efficient demand.