RESIDUAL COMPRESSIVE STRENGTH OF CONCRETE UNDER CONSTANT CYCLIC LOADS AND RELIABILITY ANALYSIS OF REINFORCED CONCRETE COLUMN

Abstract

An accurate assessment of the decreasing ultimate strength of degrading structures is one of the important techniques to maintain the present infrastructures.
This paper deals with the residual strength of reinforced concrete members subjected to constant fatigue loads.
We first make an attempt to model the accumulated strain of fatigue damage and the residual compressive strength of concrete under constant cyclic loads, in comparison of experimental observation. The proporsed model is applied to reinforced concrete columns subject to cyclic axial force and bending moment. The probabilistic prediction for compressive failure of the columns is then presented as a function of number of cyclic load based on the first-order and second-moments method.