Seismic Upgrading of Existing Steel Buildings Built on Soft Soil Using Passive Damping Systems

In regions prone to seismic activity, buildings constructed on soft soil pose a significant concern due their inferior performance. This situation often results in considerable structural damage, substantial economic loss, and increased risk human life. To address this problem, study focuses the retrofitting of steel moment-resisting frames using friction metal-yielding dampers, taking into account soil-structure interaction. The effectiveness these retrofit methods was examined through comprehensive non-linear time history analysis three prototype structures subjected series intense events. behavior simulated Bouc-Wen hysteresis model. Various parameters, including lateral displacement, maximum drift ratio, pattern plastic hinge formation, base shear distribution, dissipated hysteretic energy, were used compare performance two strategies. findings from analyses revealed that both markedly enhanced safety serviceability deficient buildings. retrofitted exhibited notable reductions residual displacements inter-story compared original frame structures. frame, primary elements absorbed amount input energy deformation. However, frames, dampers up 90% total energy. Additionally, integrating effectively transferred response dampers.