SEISMIC RESPONSE SPECTRA HAVING UNIFORM MEAN FAILURE RATES: SYSTEMS WITH DISSIPATING DEVICES AND WITHOUT THEM

摘要

An approach is presented for calculating seismic response spectra with uniform annual failure rates, applicable to conventional systems as well to those provide with energy-dissipating devices. The approach is based on the analysis of single-degree-of-freedom systems with uncertain mechanical properties subjected to simulated ground motions. The effect of uncertainties related to the structural stiffness, the yield displacement and the ductility capacity on the response spectra with uniform annual failure rate is analyzed. Based on this, the importance of taking into account the uncertainty implicit in the available ductility is underlined.