Time-dependent reliability analysis of timber-concrete composite beams

Abstract

A timber-concrete composite system is increasing the use of timber in construction. Some structures cannot be built by timber alone, but this type of composite system makes it a possibility. The deterioration of structures in service is generally uncertain over time. The appropriate approach therefore for a structural analysis is a time-dependent reliability analysis which considers the randomness and uncertainties of the deterioration process over a specific time period. This paper describes two methods for time-dependent reliability analysis, a random variable deterioration rate model and a gamma process deterioration model. It also, compares the deterioration prediction as well as service life estimation of timber-concrete composite beams under normal use, based on proposed models.