Probabilistic analysis of time-dependent deflections of RC flexural members

This paper presents a procedure for the probabilistic analysis of time-dependent deflection of a reinforced concrete flexural member subject to a time-varying load process. Particular consideration is given to simply supported, singly reinforced rectangular beams. The algorithm takes into account concrete maturation, nonlinear creep and shrinkage behavior, and stochastic load process models for both construction and service. While this paper describes some practical implications of early-age effects (i.e., high early-age construction loads on immature concrete) for serviceability design, the emphasis of this paper is on the probabilistic time-dependent deflection analysis technique.