This project proposed a methodology to assess the impact of corrosion on the performance of bridges. The combined analytical and numerical modeling of shear-critical and lap-spliced columns is detailed, and outcomes are verified with previous experimental test data. The impact of corrosion on risk is assessed through conducting fragility analyses. Results quantify the increase in failure probabilities of these structures, measured by increasing probabilities of exceeding defined damage states, with increasing levels of corrosion. Corrosion is found to have a larger impact on increasing probabilities of exceeding more severe damage states. Twenty percent mass loss of reinforcement increases the probability of exceeding the complete damage state by up to 49% and 34% for a shear-critical and lap-spliced column, respectively. The effect is more pronounced at intermediate loading intensities, where there is uncertainty about the performance of the structure. Comparing between failure modes, bridges with columns of short lap splice are more vulnerable to collapse under the same degree of corrosion compared with shear-critical columns.

Research Center/Lab(s)

INSPIRE - University Transportation Center


Principal Investigator: Iris Tien, Ph.D.

Grant Period: 30 Nov 2016 - 30 Sep 2022

Project Period: 30 Nov 2016 - 30 Jun 2020

Keywords and Phrases

Bridge; Corrosion; Inspection Data; Risk Assessment

Report Number


Document Type

Technical Report

Document Version

Final Version

File Type





© 2020 Missouri University of Science and Technology, All rights reserved.

Publication Date

30 Jun 2020