ORCID
- Shanshan Cheng: 0000-0001-8905-677X
Abstract
Twenty-four full-scale tests were carried out in order to investigate the post-fire behaviour of UHPCFST stub columns under axial compression after being exposed to elevated temperatures. The test parameters include cross-sectional size, heating mode, steel fibre content, and coarse aggregate content. The failure modes, cross-sectional historical maximum temperatures, axial load-deformation curves, and residual compressive capacities of the specimens are analysed. The test results revealed non-uniform and nonlinear distributions of the cross-sectional historical-max temperatures. It is found that the effect of historical temperature on the residual capacity of a UHPCFST column is more obvious with the increase of the heating rate and decrease of the cross-sectional size. Inspired by the concept of average temperature method under fire, a method for calculating the post-fire residual load capacity of CFST columns was proposed based on the average historical-max temperature of the cross-section. High accuracy has been found for using the proposed calculation method, therefore the work could serve as a reference for the post-fire assessment and strengthening of UHPCFST stub columns.
DOI Link
Publication Date
2022-09-01
Publication Title
Journal of Constructional Steel Research
Volume
196
ISSN
0143-974X
Acceptance Date
2022-06-10
Deposit Date
2023-02-13
Embargo Period
2023-06-20
Recommended Citation
Wang, T., Yu, M., Zhang, X., Cheng, S., & Liu, S. (2022) 'Post-fire mechanical behaviour of ultra-high-performance concrete-filled steel tube (UHPCFST) stub columns under compression', Journal of Constructional Steel Research, 196. Available at: 10.1016/j.jcsr.2022.107384
