Abstract
Based on the prototype of a fly-bird type concrete-filled steel tube (CFST) truss arch bridge, the analysis on the effect of different debonding length and debonding locations on the mechanical performance of CFST arch bridge is carried out. The results show that the axial force of chord steel tube increases and the axial force of core concrete decreases due to debonding, regardless of the debonding length or the debonding locations, but debonding hardly affect the total axial force of each chord. The bending moments of the steel tube, the core concrete and the total bending moments of each chord at the debonded locations are not uniform. The longer of deboning length is, the greater of the maximum deflection is, and the smaller of the ultimate bearing capacity is. The stiffness and ultimate bearing capacity of truss arch ribs largely decrease when whole debonding is occurred, and the maximum deflection increase by 88% and the ultimate bearing capacity decrease by 24% compared with the completely bonding situation.
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Yang, Y., Liu, J., Li, L. (2020). Effect of Different Debonding Degree on Mechanical Behavior of CFST Truss Arch Ribs. In: Arêde, A., Costa, C. (eds) Proceedings of ARCH 2019. ARCH 2019. Structural Integrity, vol 11. Springer, Cham. https://doi.org/10.1007/978-3-030-29227-0_14
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DOI: https://doi.org/10.1007/978-3-030-29227-0_14
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