In-plane creep behaviour of concrete-filled steel tubular arches

Taylor & Francis Group
Publication Type:
Conference Proceeding
Proceedings of the 13th International Symposium on Tubular Structures - ISTS13, 2010, pp. 607 - 613
Issue Date:
Filename Description Size
Thumbnail2010000791OK.pdf2.64 MB
Adobe PDF
Full metadata record
This paper presents a theoretical analysis for the in-plane creep behaviour and buckling of Concrete-Filled Steel Tubular (CFST) circular arches due to creep and shrinkage of the concrete core under a sustained uniform radial load. The algebraically tractable age-adjusted effective modulus method is used to model the creep behaviour of the concrete core, based on which the differential equations of equilibrium for the time-dependent analysis of CFST arches are derived and analytical solutions for the long-term displacements, stresses and internal forces of CFST arches under the sustained load are obtained. It is shown that the visco-elastic effects of creep and shrinkage of the concrete core have significant long-term effects on the in-plane structural behaviour of CFST arches. The creep radial and axial displacements, and the long-term bending moment increase substantially with time. It is demonstrated that the time-dependent change of the equilibrium configuration of the CFST arch can lead to a buckling configuration being attained in the long-term under a sustained load. The solution for the possible prebuckling structural life time for creep buckling of deep CFST arches has been derived.
Please use this identifier to cite or link to this item: