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Comparison of energy-based seismic structural responses based on simulated ground motions with existing empirical relationships

Erberik, Murat Altuğ
energy demand of an earthquake. Majority of the previous studies have utilized existing real ground motion sets for energy-based seismic response evaluation. However, in regions where there is lack of real records from potential events with large magnitudes, simulated motions could be employed alternatively. One important task is to investigate the suitability of the simulated motions in energy-based response evaluation of structural systems. Since these records provide a controlled variability in seismic demand, it is significant to assess them in terms of energy responses. In this study, stochastic finite-fault methodology is used for simulation of a wide range of scenario events using regional input parameters for two different seismically active areas: Duzce and Erzincan (Turkey). Then, the energy-based response of simple structural systems, i.e. single-degree-of-freedom systems are assessed with time history analyses using the generated simulated ground motion sets for the selected case studies. The results are compared with the existing empirical relationships in between seismic demand and capacity responses (e.g.: input energy, damping energy, and hysteretic energy) developed based on real ground motion datasets. Our numerical results show that simulated records yield realistic results in terms of energy demand.