TY - JOUR
T1 - Post-fire residual material properties of cold-formed steel elliptical hollow sections
AU - Chen, Man Tai
AU - Pandey, Madhup
AU - Young, Ben
N1 - Funding Information:
The authors are grateful to Shenyang Dongyang Special Section Tube for supplying the test specimens. The research work described in this paper was supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region , China (Project No. 17267416 ). The authors would also like to thank the support from the Shanghai Sailing Program , China (No. 20YF1419400 ).
Funding Information:
The authors are grateful to Shenyang Dongyang Special Section Tube for supplying the test specimens. The research work described in this paper was supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. 17267416). The authors would also like to thank the support from the Shanghai Sailing Program, China (No. 20YF1419400).
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/8
Y1 - 2021/8
N2 - An experimental programme to investigate the residual material properties of fire exposed cold-formed steel elliptical hollow sections has been presented in this study. The test specimens were made of cold-formed steel elliptical hollow sections (CFSEHS) of the mild steel grade. The CFSEHS members were heated inside a gas furnace by generally following the ISO-834 standard fire (1999, [1]) curve. A total of 4 sets (set-1, 2, 3 and 4) of fire exposures with peak temperatures of 300 °C, 550 °C, 750 °C and 900 °C was carefully selected for this investigation. The identical sets of CFSEHS members were exposed to these fire exposure temperatures followed by their natural cooling inside the gas furnace. Upon complete cooling, 36 longitudinal tensile coupon specimens were fabricated from the flattest and curviest portions of ISO-834 standard fire exposed CFSEHS members. Subsequently, residual material properties and corresponding residual factors were determined from the static post-fire stress-strain curves. It is worth mentioning that no investigation is available on the post-fire material behaviour of CFSEHS members. Therefore, using the test results of this study, empirical equations are proposed to predict the post-fire residual material properties of CFSEHS members.
AB - An experimental programme to investigate the residual material properties of fire exposed cold-formed steel elliptical hollow sections has been presented in this study. The test specimens were made of cold-formed steel elliptical hollow sections (CFSEHS) of the mild steel grade. The CFSEHS members were heated inside a gas furnace by generally following the ISO-834 standard fire (1999, [1]) curve. A total of 4 sets (set-1, 2, 3 and 4) of fire exposures with peak temperatures of 300 °C, 550 °C, 750 °C and 900 °C was carefully selected for this investigation. The identical sets of CFSEHS members were exposed to these fire exposure temperatures followed by their natural cooling inside the gas furnace. Upon complete cooling, 36 longitudinal tensile coupon specimens were fabricated from the flattest and curviest portions of ISO-834 standard fire exposed CFSEHS members. Subsequently, residual material properties and corresponding residual factors were determined from the static post-fire stress-strain curves. It is worth mentioning that no investigation is available on the post-fire material behaviour of CFSEHS members. Therefore, using the test results of this study, empirical equations are proposed to predict the post-fire residual material properties of CFSEHS members.
KW - Cold-formed steel
KW - Elliptical hollow section
KW - ISO-834 standard fire
KW - Post-fire
KW - Residual material properties
KW - Stress-strain curves
UR - http://www.scopus.com/inward/record.url?scp=85106353818&partnerID=8YFLogxK
U2 - 10.1016/j.jcsr.2021.106723
DO - 10.1016/j.jcsr.2021.106723
M3 - Journal article
AN - SCOPUS:85106353818
SN - 0143-974X
VL - 183
JO - Journal of Constructional Steel Research
JF - Journal of Constructional Steel Research
M1 - 106723
ER -