Title:
Residual Strength of Corrosion-Damaged Reinforced
Concrete Beams
Author(s):
Abul K. Azad, Shamsad Ahmad, and Syed A. Azher
Publication:
Materials Journal
Volume:
104
Issue:
1
Appears on pages(s):
40-47
Keywords:
deflection; flexural strength; reinforced concrete; reinforcement
corrosion
DOI:
10.14359/18493
Date:
1/1/2007
Abstract:
In this work, an effort has been made to first observe the effect of reinforcement corrosion on flexural behavior of reinforced concrete beams and then to develop a model based on the test data to predict their residual flexural strength. Test data were gathered from the testing of 56 reinforced concrete beam specimens that were subjected to a varying degree of accelerated corrosion. It has been observed that the product of corrosion current density and corrosion period IcorrT is the most significant factor affecting the flexural strength of a corroded beam. Based on the experimental data, a two-step approach is proposed to predict the residual flexural strength of a corroded beam. First, the flexural strength is calculated using the reduced area of corroded bars, and then this value is multiplied by a correction factor that is formulated through a regression analysis of test data to take into account bond, slip, and other applicable factors.