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In order to study the effect of CFRP constraint effect coefficient and eccentricity on the mechanical properties of CFRP-confined CFST columns under eccentric compression, two specimens were established by ABAQUS, and the correctness of the model was verified. First, 16 specimens were designed to study the effect of different CFRP constraint effect coefficients on the specimens, and 8 specimens were designed to study the effect of different eccentricities. Then, the stress nephogram, load–deflection curve and ultimate bearing capacity of the specimens were analyzed. The results show that the ultimate bearing capacity increased approximately and linearly, and the ultimate deflection decreased slightly with the increase in the CFRP-confined effect coefficient. The ultimate bearing capacity of specimens with large eccentricities decreases significantly, and the deflection corresponding to ultimate bearing capacity is low. The CFRP has a constraint effect on the CFST columns, which delays the development of plastic area of the section and improves the stiffness of columns.
Journal of The Institution of Engineers (India):Series A – Springer Journals
Published: Apr 30, 2022
Keywords: CFRP-confined concrete-filled steel tube column; CFRP constraint effect coefficient; Eccentricity; ABAQUS; Mechanical property
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