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Steel and Composite Structures Volume 36, Number 5, September10 2020 , pages 587-602 DOI: https://doi.org/10.12989/scs.2020.36.5.587 |
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Performance of composite frame consisting of steel beams and concrete filled tubes under fire loading |
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Mahdi Shariati, Mohammad Grayeli, Ali Shariati and Morteza Naghipour
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| Abstract | ||
| In recent years, the composite columns have been widely used in the structures. These columns are mainly used to construct the structures with a large span and high floor height. Concrete filled tubes (CFTs) are a type of composite column, which are popular nowadays due to their numerous benefits. The purpose of this study is to investigate such frames at elevated temperatures. The method used in this research is based on section 2.2 of Eurocode 4. First, for the verification purpose, a comparison was made between the experimental results and the numerical model of the concrete filled tube. Then a composite frame was analyzed under fire temperature with different parameters. The results showed that the failure time decreased with increasing the friction of different models. Moreover, investigation of the concrete moisture content revealed that an increase in the concrete moisture content from 3% to 10% led to extended failure time for different models. For instance, in the second frame model, the failure time has increased up to 8%. | ||
| Key Words | ||
| composite sections; concrete filled tube (CFT); frame; fire resistance; FEM modeling; nonlinear analysis | ||
| Address | ||
| Mahdi Shariati: Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam Mohammad Grayeli: Mazandaran University of Science and Technology, Babol, Iran Ali Shariati:Division of Computational Mathematics and Engineering, Institute for Computational Science, Ton Duc Thang University, Ho Chi Minh City 758307, Vietnam; Faculty of Civil Engineering, Ton Duc Thang University, Ho Chi Minh City 758307, Vietnam Morteza Naghipour: Civil Engineering Faculty, Babol Noshirvani University of Technology, Babol, Iran | ||