Lyons, E and Wang, Vincent (2010) Effect of material degradation models on the safety performance of reinforced concrete members subject to extreme loading. In: 35th Conference on Our World in Concrete & Structures, 25 August 2010-27 August 2010, Singapore.

Abstract

The safety performance of reinforced concrete (RC) members is influenced by various material degradation mechanisms. Based on selected degradation models and allowing for possible extreme loading events, an attempt is made in the study presented here to quantify this time-variant influence. The uncertainty associated with the problem can be attributed to a series of factors such as the material strengths and their degradation, the number of extreme loading events, and the magnitude of extreme loading. The quantification of the safety performance is thus implemented in a stochastic modeling manner, resulting in estimated probabilistic characteristics of the time-variant RC member loading-carrying capacity and the corresponding probabilities of failure of the RC members. A sensitivity analysis of these characteristics is also carried out. Due to the structural redundancy usually present in an RC structure, different failure combination scenarios are investigated. The stochastic modeling is conducted with respect to normalized quantities to facilitate future efforts in developing relevant design aids.

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