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A platform for research: civil engineering, architecture and urbanism
Behaviour and design of high-strength octagonal CFST short columns subjected to combined compression and bending
Abstract A systematic experimental and numerical investigation on the behaviour of octagonal concrete-filled steel tube short columns fabricated with S690 high-strength steel and C90 high-strength concrete, and subjected to combined compression and bending is reported in this paper. Experiments were firstly performed on twelve short column specimens with different plate width-to-thickness ratios. The experimental results and observations including the ultimate loads, load versus displacement responses and failure modes of the specimens were discussed. In supplementary to the experimental investigation, numerical investigation using a validated finite element model was performed to examine the behaviour of the structures with a wide range of plate width-to-thickness ratios, yield strength of high-strength steel and compressive strength of high-strength concrete that subjected to various combinations of compression and bending. Based on the experimental and numerical results, the applicability of existing design approaches in standards was also evaluated. The assessment shows that the design approaches provide conservative strength predictions for the high-strength octagonal concrete-filled steel tube short columns under combined compression and bending and can be applied to provide safe designs for the structures.
Highlights High-strength octagonal CFST short columns under combined loading were investigated. Both experiments and numerical modelling were performed for the investigation. The variation of compressive resistance with increasing moment was observed. The suitability of existing design methods was assessed using the research results. The design methods in standards can be safely applied for the structures.
Behaviour and design of high-strength octagonal CFST short columns subjected to combined compression and bending
Abstract A systematic experimental and numerical investigation on the behaviour of octagonal concrete-filled steel tube short columns fabricated with S690 high-strength steel and C90 high-strength concrete, and subjected to combined compression and bending is reported in this paper. Experiments were firstly performed on twelve short column specimens with different plate width-to-thickness ratios. The experimental results and observations including the ultimate loads, load versus displacement responses and failure modes of the specimens were discussed. In supplementary to the experimental investigation, numerical investigation using a validated finite element model was performed to examine the behaviour of the structures with a wide range of plate width-to-thickness ratios, yield strength of high-strength steel and compressive strength of high-strength concrete that subjected to various combinations of compression and bending. Based on the experimental and numerical results, the applicability of existing design approaches in standards was also evaluated. The assessment shows that the design approaches provide conservative strength predictions for the high-strength octagonal concrete-filled steel tube short columns under combined compression and bending and can be applied to provide safe designs for the structures.
Highlights High-strength octagonal CFST short columns under combined loading were investigated. Both experiments and numerical modelling were performed for the investigation. The variation of compressive resistance with increasing moment was observed. The suitability of existing design methods was assessed using the research results. The design methods in standards can be safely applied for the structures.
Behaviour and design of high-strength octagonal CFST short columns subjected to combined compression and bending
Fang, Han (author) / Li, Qiu-Yun (author) / Chan, Tak-Ming (author) / Young, Ben (author)
2022-11-07
Article (Journal)
Electronic Resource
English
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