The redesign for residual service life of existing structures

A residual survival probability of members and systems of existing structures subjected to extreme service and climate actions is considered. The time-dependent safety margin of particular members (sections, bars, connections) and its modifications as stochastic finite sequences are discussed. The prediction of primary and revised instantaneous and long-term survival probabilities of members is introduced. The effect of deterministic short-term extreme action effects on the values of revised survival probabilities of existing members is based on the concepts of truncated resistance distributions and Bayesian statistical approaches. The revised reliability index of precast concrete floor slabs is considered and demonstrated by the numerical example.