Structural Behaviour of Friction Dampers and Isolation Techniques for Seismic Vibration Control of Buildings

Studies on the methods to mitigate the effects of earthquake on structures has gained up pace since the last four decades with the invention of base isolation techniques and then the energy dissipating seismic devices. Here in this work an effort has been made to study the effects of Lead Rubber Bearing (LRB) as base isolator and Friction Dampers as energy dissipating devices when installed individually and when as a dual combination in the eight storey ‘C’ shaped building considered by the use of ETABS software. The building is assumed to be located in earthquake zone 4 and the method of seismic analysis chosen is linear Response Spectrum analysis. The response parameters that are studied in this work are time period, base shear, storey displacement and storey drifts. The results show that these devices have improved seismic resistance of the building by decreasing the responses of the structure when included as individually and when as a combined control strategy. The improved results are in comparison with the conventional model.