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Steel and Composite Structures Volume 53, Number 6, December 25 2024 (Special Issue) pages 665-675 DOI: https://doi.org/10.12989/scs.2024.53.6.665 |
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Guidance for the treatment of high-temperature creep in the fire resistance analysis of steel structures |
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Svetha Venkatachari and Venkatesh Kodur
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| Abstract | ||
| High-temperature creep poses a significant risk to the stability of steel structures, particularly when steel sectional temperatures rise beyond 400°C. It is crucial to address this phenomenon in fire resistance analyses of steel structures appropriately. This paper offers various design approaches to accommodate high-temperature creep in the analysis of steelframed structures. The first approach, termed the 'creep-marginal' scenario, suggests disregarding the high-temperature creep strain in steel members experiencing low stress levels and sectional temperatures. In the 'creep-moderate' scenario, where the high-temperature creep strain is considerable, it can be implicitly integrated into the analysis. For situations with substantial creep strains, such as high stress levels and high temperatures, it is essential to explicitly incorporate creep into the fire resistance analysis ('creep-significant' scenario). The feasibility of these approaches in addressing creep in fire resistance analyses is demonstrated through three case studies involving steel-framed structures at various complexity levels. | ||
| Key Words | ||
| design recommendations; fire resistance; high-temperature creep; progressive collapse; steel structures | ||
| Address | ||
| Svetha Venkatachari:Department of Civil Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, Delhi 110016, India Venkatesh Kodur:1) Department of Civil and Environmental Engineering, Michigan State University, East Lansing, MI 48824, USA 2) Department of Architectural & Urban Systems Engineering, Ewha Womans University, Seodaemun-gu, Seoul, South Korea | ||