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| Vol. - No. | Vol.7 - No.4 |
|---|---|
| Date | Dec., 2018 |
| Title | Fire Resistance Studies on High Strength Steel Structures |
| Author | Wei-Yong Wang1+, Yue Xia1, and Guo-Qiang Li2 |
| Institutions |
1School of Civil Engineering, Chongqing University, Chongqing 400045, China 2State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 20092, China |
| Abstract |
High strength steels have been widely applied in recent years due to high strength and good working performance. When subjected to fire conditions, the strength and elastic modulus of high strength steels deteriorate significantly and hence the load bearing capacity of structures reduces at elevated temperatures. The reduction factors of mechanical properties of high strength steels are quite different from mild steels. Therefore, the fire design methods deduced from mild steel structures are not applicable to high strength steel structures. In recent ten years, the first author of this paper has carried out a lot of fundamental research on fire behavior of high strength steels and structures. Summary of these research is presented in this paper, including mechanical properties of high strength steels at elevated temperature and after fire exposure, creep response of high strength steels at elevated temperature, residual stresses of welded high strength steel member after fire exposure, fire resistance of high strength steel columns, fire resistance of high strength steel beams, local buckling of high strength steel members, and residual strength of high strength steel columns after fire exposure. The results show that the mechanical properties of high strength steel in fire condition and the corresponding fire resistance of high strength steel structures are different from those of mild steel and structures, and the fire design methods recommended in current design codes are not applicable to high strength steel structures. |
| Keyword | High strength steels, Fire resistance, Mechanical properties, Creep, Residual stress, Fire exposure |
| PP. | PP.287~298 |
| Paper File |
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