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Round-ended concrete-filled steel tube columns under impact loading: Test, numerical analysis and design method
Abstract This paper reports experimental and numerical investigations on the behaviours of round-ended concrete filled steel tube (RE-CFST) columns under combined pre-axial and impact loadings. Twelve RE-CFST specimens were tested to assess the influences of the cross-sectional aspect ratio, impact velocity and pre-axial loading on the impact-resisting performance. The failure patterns, impact force and mid-span deflection histories were obtained and analyzed. Test results showed that increasing pre-axial loading led to a decrease in the plateau impact force and an increase in the mid-span deflection. In addition, the finite element (FE) models were developed and calibrated with the experimental data, and then employed for evaluating the working mechanism of typical RE-CFSTs during the whole impact process and performing parametric investigations. According to the experimental and numerical results, empirical formulae were proposed for predicting the plateau impact force of RE-CFST columns subjected to lateral impact.
Highlights Drop-hammer impact tests on twelve round-ended concrete-filled steel tube columns. Influences of cross-sectional aspect ratio, impact energy, and pre-axial loading on the impact-resisting performance. Validated finite element models used for analysis of the full-range impact response. Simplified formula for estimating the plateau impact force of RE-CFST columns.
Round-ended concrete-filled steel tube columns under impact loading: Test, numerical analysis and design method
Abstract This paper reports experimental and numerical investigations on the behaviours of round-ended concrete filled steel tube (RE-CFST) columns under combined pre-axial and impact loadings. Twelve RE-CFST specimens were tested to assess the influences of the cross-sectional aspect ratio, impact velocity and pre-axial loading on the impact-resisting performance. The failure patterns, impact force and mid-span deflection histories were obtained and analyzed. Test results showed that increasing pre-axial loading led to a decrease in the plateau impact force and an increase in the mid-span deflection. In addition, the finite element (FE) models were developed and calibrated with the experimental data, and then employed for evaluating the working mechanism of typical RE-CFSTs during the whole impact process and performing parametric investigations. According to the experimental and numerical results, empirical formulae were proposed for predicting the plateau impact force of RE-CFST columns subjected to lateral impact.
Highlights Drop-hammer impact tests on twelve round-ended concrete-filled steel tube columns. Influences of cross-sectional aspect ratio, impact energy, and pre-axial loading on the impact-resisting performance. Validated finite element models used for analysis of the full-range impact response. Simplified formula for estimating the plateau impact force of RE-CFST columns.
Round-ended concrete-filled steel tube columns under impact loading: Test, numerical analysis and design method
Zhao, Hui (Autor:in) / Mei, Shengqi (Autor:in) / Wang, Rui (Autor:in) / Yang, Xu (Autor:in) / Lam, Dennis (Autor:in) / Chen, Wensu (Autor:in)
Thin-Walled Structures ; 191
09.07.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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