Seismic Analysis of RC Framed Structures Using ETABS Software

Under seismic loading for the soft storey structure, the columns will fail due to the formation of plastic hinges and thus the mitigation of it is necessary and under heavy vibrations, the structure will experience excessive movements, feeling uncomfortable. Traditionally, the soft storey effect is reduced by shear walls, bracings and excessive movements by isolators and dampers. In the present investigation, a G + 10 storied building subjected to seismic loading was studied for equivalent static, response spectrum, non – linear time history (El Centro) method carried out in ETABS software. The parameters of displacement, storey drifts, base shear, storey stiffness, time period, peak accelerations and velocities to determine the structural performance. The performance of the structure was determined with struts under soft storey effect and vibrational control. Here, these effects are reduced by the shear walls, bracings, cross sectional increase in soft storey columns and TMD, analyzed with struts modelled using Den Hartog for TMD and Mainstone for Struts. The study show the comparison of the parameters, which revel that all the models perform better when compared to conventional frame. The results revealed that maximum displacement, drift and base shear are drastically reduced for TMD, and soft storey and displacements are moderately reduced for shear walls and bracings.