Behaviour of bird-beak square hollow section X-joints under out-of-plane bending

Chen, Yu; Ruan, Feng; Wang, Jiang

doi:10.1016/j.jcsr.2014.12.016

Cited by 18 publications

(3 citation statements)

References 10 publications

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“…Ductility and initial stiffness are obtained by this method, which is called the secant stiffness method. Specifically, the ductility coefficient (µ) is calculated as follows [38]:…”

Section: Test Resultsmentioning

confidence: 99%

Behavior of Circular CFST Columns Subjected to Different Lateral Impact Energy

et al. 2019

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Forty-eight circular concrete-filled steel tube (CFST) columns subjected to lateral impact were tested to investigate the behavior of circular CFST columns under axial compressive load. Analyses of effects of concrete compressive strength, impact location and impact energy on residual ultimate axial capacity, ductility and initial stiffness are provided in this paper. It is found that lateral impact has negative effects on residual ultimate axial capacity of circular CFST columns from test results. Residual ultimate axial capacity decreases as impact energy increases and impact location comes close to the end of the specimen. It is also found that increasing concrete compressive strength can reduce the negative effects of impact location on residual ultimate axial capacity. Ductility and the initial stiffness of circular CFST columns decrease as impact energy increases. Ductility and the initial stiffness increase as impact location varies from middle-length to the end of specimens. When impact energy and impact location are constant, the ductility of the specimen with 30 MPa of concrete compressive strength is better than that of other specimens with different compressive strength. Besides, analyses of strain developments for 12 typical specimens to investigate failure modes under axial compressive load are provided in this paper. Strain developments have indicated that the steel at impact location becomes plastic faster than that at other locations. Based on the test results, a calculation formula is presented to predict the residual ultimate axial capacities of circular CFST columns subjected to lateral impact, and good agreement with experimental results has been achieved.

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“…Ductility and initial stiffness are obtained by this method, which is called the secant stiffness method. Specifically, the ductility coefficient (µ) is calculated as follows [38]:…”

Section: Test Resultsmentioning

confidence: 99%

Behavior of Circular CFST Columns Subjected to Different Lateral Impact Energy

et al. 2019

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show abstract

“…The equivalent strain (ε i ) could be calculated as follows [13,14]: Table 5. "Strain gauging points A" represents the first strain gauging points of the chord and brace that enter plasticity stage; "Strain gauging points B" represents the strain gauging points of the chord and brace that do not enter plasticity in ultimate limit state; "N y " represents the hydraulic jack load corresponding to first strain gauging points that enter plasticity stage; "N u " represents the hydraulic jack load in ultimate limit state.…”

Section: Strain Distributionmentioning

confidence: 99%

“…Hence an experimental program has been designed to investigate the static behavior of SHS X-joints reinforced by doubler or collar plates under out-of-plane bending. A total of 13 parameters brace to chord side length ratio (β) and reinforcement plates thickness. In the following sections hereafter, the experimental research program and the general test arrangement are described.…”

Section: Introductionmentioning

confidence: 99%