Quantified risk analysis of light framed construction due to mainshock and aftershock sequences.

Quantified risk assessment is performed for a typical light-frame wood residential building in the U.S. subject to mainshock and aftershock sequences. Mainshocks are simulated by a homogeneous Poisson process, while aftershocks are simulated by a nonhomogeneous Poisson process. For mainshocks, pairs of ground motions are randomly selected, and geometrically scaled in accordance to the predicted spectra using an attenuation model. Transition and downtime costs are determined due to mainshocks and aftershocks, considering time discount factor. Aftershocks are found to be a significant factor for seismic risk analysis for wood constructions.

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