Abstract
From ancient times, earthquakes have been considered the most devastating natural disaster. Many times, the damages caused by earthquakes are irrecoverable due to the static design of building structures. For the reduction of these damages, friction dampers are widely used as passive energy dissipation devices. As the friction dampers are designed with fixed base assumption, the effect of soil-structure interaction is totally neglected. Hence, the present study deals with the design methodology of friction damper incorporating soil-structure interaction effect. The slip load of friction dampers has been calculated by assuming a fixed base and flexible base (i.e. the linear and nonlinear behavior). The different models of a soil-foundation system were constructed using multilinear elements. The pushover analysis has been carried out to design the friction damper and the comparison of the same has also been done. Finally, a numerical study over different models was carried out to evaluate the performance of the friction dampers. The response was compared based on storey drift, member forces, and energy dissipated by friction dampers. It was found that the design of friction dampers by considering the non-linearity of soil leads to a realistic approach to seismic design.
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