Seismic Response of G+21 RC Building with Shear Wall and Floating Column Arrangement
Seismic Response of G+21 RC Building with Shear Wall and Floating Column Arrangement
Authors:
1Nutan Chandrakant Sawant, 2Prof. Abhijeet R. Undre, 3Dr. Atul Pujari
1ME Student, KJ’s Educational Institute, KJ College of Engineering and Management Research, Pune, Maharashtra (Affiliated to Savitribai Phule Pune University)
2Associate professor, KJ’s Educational Institute, KJ College of Engineering and Management Research, Pune, Maharashtra (Affiliated to Savitribai Phule Pune University)
3Associate professor/Dr., KJ’s Educational Institute, KJ College of Engineering and Management Research, Pune, Maharashtra (Affiliated to Savitribai Phule Pune University)
ABSTRACT
Construction activity in hilly regions has increased the need for seismic evaluation of reinforced concrete buildings resting on sloping ground. Such buildings are geometrically irregular because column heights vary along the slope, producing stiffness discontinuity, torsion, short-column action and non-uniform distribution of seismic demand. This project work presents the seismic analysis of a multi-storeyed reinforced concrete building model using structural analysis software. The main purpose is to understand the behaviour of the building under lateral earthquake forces and to compare the response of the regular model with the model having shear wall and floating column arrangement. Four configurations are considered: step-back building with infill wall, step-back building without infill wall, step-back-setback building with infill wall and step-back-setback building without infill wall. The building model is analysed under seismic loading as per Indian Standard provisions, and the response parameters such as displacement, storey drift, storey shear and base shear are studied. The major response parameters are base shear, storey displacement, storey drift, time period and bending moment. The study shows that slope angle, infill modelling and configuration type significantly influence seismic response. Step-back-setback systems generally show better displacement control, while omission of infill walls reduces lateral stiffness and changes base shear and drift demand.
Keywords - Sloping ground, RC building, SAP2000, step-back building, step-back-setback building, equivalent static analysis, response spectrum analysis, base shear, storey displacement, storey drift.