Seismic performance assessment of steel corrugated shear wall system using non-linear analysis

摘要

A new approach to develop seismic response factors for the design of structural systems has recently been developed by the Applied Technology Council and published in the FEMA P-695 document The FEMA P-695 assessment methodology provides a comprehensive and objective approach to evaluate the performance factors based on non-linear structural analysis, while considering the uncertainties in design requirements, supporting test data, and the non-linear model. The goal of the methodology is to ensure that buildings designed with the selected performance factor have an acceptably low likelihood of structural collapse under extreme (rare) earthquake ground motions. The methodology is based on the design and assessment of representative archetypical building designs, whose collapse performance is evaluated through a series of non-linear static and dynamic analyses using numerical models that are calibrated to experimental test data. This methodology is applied to evaluate the seismic performance factors for a newly proposed light-framed steel shear wall seismic force resisting system, developed by Tipping Mar and Associates of Berkeley, California. The system consists of a steel corrugated sheet shear wall for use in mid-size residential and commercial structures. The calibration of the non-linear analysis model parameters to experimental data uses genetic algorithms. The system archetypes evaluated in this study are shown to meet the FEMA P-695 acceptance criteria for a seismic response modification factor of R equal to 4.