抄録
The purpose of this paper is to clarify the stochastic properties of energy absorption capacity for steel moment resisting frames considering the uncertainty of member ductility. Six types of moment resisting steel frames with different number of story are used as basic analytical models. The member restoring force-deformation characteristics employed in the analytical models are elastic-plastic bi-linear models with a deformation limit. For six analytical models, load-deformation relations under static horizontal loads are calculated using Monte Carlo simulation and elastic-plastic pushover analysis with considering a stress redistribution after member brittle failures. Energy absorbing capacity of frames is defined for three different limit states, yield limit, initial fracture limit and failure limit. Based on the analytical results, this paper proposes practical and simple formulae which can estimate the lower percentile value of absorbed energy of steel frames.
