Effect of CFRP on Buckling Performance of Thin-Walled Cylindrical Steel Tanks with Dents and Corrosion
Mahmut Kılıç, Ömer Karadağ, Fatma Merve Korucuk, Yasin Tizi, Nurullah Çınar, Dilek Biten, Mahyar Maali
TL;DR
This study shows that carbon fiber reinforcement can significantly improve the buckling resistance of thin steel tanks damaged by dents and corrosion.
Contribution
The novel contribution is demonstrating CFRP's effectiveness in restoring structural stability of corroded and dented thin-walled steel shells under external pressure.
Findings
Corrosion and dents significantly reduced buckling capacity and structural stability of thin-walled steel shells.
CFRP strengthening improved ultimate load, ductility, and postbuckling behavior in damaged specimens.
SEM analysis revealed progressive corrosion from localized pitting to widespread delamination.
Abstract
Thin-walled steel cylindrical shells offer excellent strength-to-weight ratios but are highly sensitive to mechanical imperfections and corrosion-induced degradation. This study investigated the effects of dents and corrosion on the buckling behavior of 0.45 mm-thick thin-walled cylindrical steel shells, as well as the efficiency of carbon fiber-reinforced polymer (CFRP) strengthening under external pressure. Nine specimens were tested, including corroded samples exposed to 2.5% and 5% HCl solutions to simulate material deterioration. The results revealed that both corrosion and dents significantly reduced the buckling capacity and structural stability of the specimens. However, in comparison with earlier investigations on unstrengthened and partially strengthened specimens, the external CFRP layers substantially mitigated capacity losses, improving ultimate load, ductility, and…
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Taxonomy
TopicsStructural Integrity and Reliability Analysis · Structural Behavior of Reinforced Concrete · Composite Structure Analysis and Optimization