Simplified closed-form expressions for the mean failure rate of structures considering structural deterioration

摘要: Two closed-form mathematical expressions are presented for the evaluation of mean annual failure rate deteriorating structures at end a given time interval. It is assumed that structural capacity deteriorates linearly in both expressions. The assumption demand varies as function added to one them. approach based on probabilistic seismic hazard analysis used SAC-FEMA project. applied 10-storey building. difference expected number failures after 150 years constructing building results about 16.3% higher with respect case when deterioration neglected. Attention called importance considering not only variation capacity, but also time-dependent probabilities structures.