Abstract
Bridge infrastructure maintenance and assurance of adequate safety is of paramount importance in transportation engineering and maintenance management industry. Corrosion causes strength deterioration, leading to impairment of its operation and progressive weakening of the structure. Since the actual corroded surfaces are different from each other, only experimental approach is not enough to estimate the remaining strength of corroded members. However, in modern practices, numerical simulation is being used to replace the time-consuming and expensive experimental work and to comprehend on the lack of knowledge on mechanical behavior, stress distribution, ultimate behavior, and so on. This paper presents the nonlinear FEM analyses results of many corroded steel plates and compares them with their respective tensile coupon tests. Further, the feasibility of establishing an accurate analytical methodology to predict the residual strength capacities of a corroded steel member with lesser number of measuring points is also discussed.
Highlights
Major steel bridges are usually the crucial elements of the road and railway infrastructures
One objective of this paper is to present the analytical results of many actual corroded steel members and compare them with their experimental results in order to establish an analytical methodology to estimate the remaining yield and tensile strengths
It was found that the analytical model results were almost the same as the experimental results with having a negligible percentage error of 0.03% and 0.02% in yield and tensile strengths, respectively
Summary
Major steel bridges are usually the crucial elements of the road and railway infrastructures. Very often they constitute a part of critical links between highly habited areas. As a consequence, their closure or traffic capacity reduction causes major inconveniences for the users and results in significant losses to the economy. It is very difficult to retrofit or rebuild those aged bridges at the same time. It is important to evaluate the remaining strength capacities of those bridges, in order to keep them in service until they require necessary retrofit or rebuild in appropriate time
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