Restoring Force Model for Seismic Performance of Corroded Steel Frame Columns
Journal Title: GeoStruct Innovations - Year 2024, Vol 2, Issue 3
Abstract
Corrosion-induced damage significantly impairs the seismic performance of steel frame columns, leading to an increased vulnerability during earthquake events. To address this issue, a restoring force model was developed to accurately describe the seismic behaviour of corroded steel columns. Low-cycle repeated loading tests were conducted on corroded steel frame columns to evaluate the effects of corrosion and earthquake-induced damage on their seismic performance. The results revealed distinct degradation patterns, which were systematically analyzed. A cyclic degradation index was proposed to quantify the impact of corrosion on critical parameters, including yield strength, hardening stiffness, unloading stiffness, and reloading stiffness. This index was incorporated into a damage model, which facilitated the formulation of a comprehensive restoring force model for corroded steel frame columns. The developed model was validated through case studies, demonstrating its effectiveness in predicting the seismic response of corroded columns. The findings underscore the importance of considering corrosion damage in the assessment and design of steel frame columns subjected to seismic loading, providing a more accurate and reliable approach for seismic performance evaluation.
Authors and Affiliations
Pengfei Wang, Xiaofei Wang, Wei Chen, Jing Shi
Keywords
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- EP ID EP753597
- DOI https://doi.org/10.56578/gsi020304
- Views 26
- Downloads 0
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