Service Life Prediction of Existing Reinforced Concrete Bridges Exposed to Chloride Environment
Publication: Journal of Infrastructure Systems
Volume 8, Issue 3
Abstract
There is a need to develop a calculation method to aid in the making of reliable predictions for the service life of bridge structures. This paper examines the basis for making service life predictions for existing reinforced concrete (RC) bridges in chloride-laden environments based on mathematical modeling. The corrosion process has two stages, the initiation time including depassivation time and the corrosion (propagation) time The total service life of existing RC bridges can be expressed as Many mathematical models were applied to calculate each and The AJMF (2) and modified Bazant methods are suggested to estimate the values of and respectively. The Chung-shan Bridge, 69 years old, in Taipei, was offered as an illustrative example for the modeling approach and service life predictions. The predicted results, such as B, E, F, and H zones, for the service life of the old Chung-shan Bridge using the proposed method showed that it is serviceable and reliable compared with measured damage. The results of this study were provided as a basis for repair, reinforcement, and demolition of existing RC bridges.
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Published In
Journal of Infrastructure Systems
Volume 8 • Issue 3 • September 2002
Pages: 76 - 85
Copyright
Copyright © 2002 American Society of Civil Engineers.
History
Received: Nov 29, 2000
Accepted: Apr 8, 2002
Published online: Aug 15, 2002
Published in print: Sep 2002
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