New structural probabilistic and non-probabilistic hybrid reliability model

The problem of hybrid reliability analysis of structures with random and interval variables is investigated. On the basis of the probabilistic reliability model, a new probabilistic and non-probabilistic hybrid reliability model of structures is proposed. The ratio of the strength to the stress is defined as the random-interval safety factor. The probabilistic reliability for random-interval safety factors exceeding unity is suggested as the measure of structural hybrid reliability. To demonstrate the compatibility among the hybrid reliability model, the probabilistic reliability model and the non-probabilistic reliability model, two specific cases of the hybrid reliability model are discussed. Two examples are utilized to illustrate the effectiveness and feasibility of the hybrid reliability model.