Evaluation of ultimate compressive strength of corroded stiffened steel plates

• Published in: Journal of Structural Engineering, A Vol. 55A; pp. 61 - 67
• Main Authors: Nara, Satoshi, Inoue, Naoya, Matsunaga, Kohji, Takeuchi, Shoichi
• Format: Journal Article
• Language: English; Japanese
• Published: Japan Society of Civil Engineers 2009
• Subjects: corroded stiffened steel plate; evaluation method; ultimate compressive strength
• ISSN: 1881-820X
• DOI: 10.11532/structcivil.55A.61

In order to estimate the ultimate strength of corroded steel members, FEM analysis is one of the most effective tool. On the other hand, however, it is required to show a simple and precise method to estimate existing ultimate strength of steel structural members making use of measured data on corrosion. This paper proposes a useful method of evaluating the ultimate compressive strength of corroded stiffened steel plates. At first, numerical analysis is carried out based on the following parameters, corroded plate thickness, corroded positions in the plate, and plate slenderness parameter, and so on. Secondary, equivalent plate thickness of the corroded plate, which is obtained by an original weighted function, is modified. Finally, proposed is a convenient column approach for predicting the ultimate strength of the corroded stiffened steel plate with a longitudinal stiffener, and validity of this proposal is demonstrated.