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Steel and Composite Structures Volume 23, Number 5, April10 2017 , pages 611-621 DOI: https://doi.org/10.12989/scs.2017.23.5.611 |
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Fire resistance of high strength fiber reinforced concrete filled box columns |
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Chao-Wei Tang
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| Abstract | ||
| This paper presents an investigation on the fire resistance of high strength fiber reinforced concrete filled box columns (CFBCs) under combined temperature and loading. Two groups of full-size specimens were fabricated. The control group was a steel box filled with high-strength concrete (HSC), while the experimental group consisted of a steel box filled with high strength fiber concrete (HFC) and two steel boxes filled with fiber reinforced concrete. Prior to fire test, a constant compressive load (i.e., load level for fire design) was applied to the column specimens. Thermal load was then applied on the column specimens in form of ISO 834 standard fire curve in a large-scale laboratory furnace until the set experiment termination condition was reached. The test results show that filling fiber concrete can improve the fire resistance of CFBC. Moreover, the configuration of longitudinal reinforcements and transverse stirrups can significantly improve the fire resistance of CFBCs. | ||
| Key Words | ||
| fire resistance; high strength fiber concrete; concrete filled box columns | ||
| Address | ||
| Department of Civil Engineering & Geomatics, Cheng Shiu University, No. 840, Chengcing Rd., Niaosong District, Kaohsiung City, Taiwan R.O.C. | ||