Title:
Probabilistic Approach to Fatigue Life Prediction of Repaired Reinforced Concrete Slabs
Author(s):
K. C. G. Ong, P. Paramasivam, B. G. Ong, and S. L. Lee
Publication:
Structural Journal
Volume:
92
Issue:
5
Appears on pages(s):
553-561
Keywords:
cyclic loads; flexural strength; probability theory; reinforced concrete; repairs; Structural Research
DOI:
10.14359/906
Date:
11/1/1995
Abstract:
A simple probabilistic approach is proposed to account for the uncertainties in the fatigue life prediction of repaired reinforced concrete slab specimens. In this approach, the fatigue life of a typical repaired slab is formulated as a function of the probability of the actual flexural rigidity smaller than a specified minimum value. The loading considered is due to the differential in stresses sustained by the slab throughout its life. An experimental program was carried out in which mean deterioration in flexural rigidity of unrepaired and repaired slab specimens was monitored. Total uncertainties in determining the static ultimate strength and residual flexural rigidity were also estimated. The variation of the load acting on the slab during its life was characterized by a probability density function. Within the specified load range and the repair method considered, the repaired reinforced concrete slabs tested had good fatigue properties.