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Behaviour of concrete filled steel tubular (CFST) stub columns under eccentric partial compression
Authors:You-Fu Yang  Lin-Hai Han
Affiliation:1. School of Civil Engineering, Dalian University of Technology, Dalian 116024, PR China;2. Department of Civil Engineering, Tsinghua University, Beijing 100084, PR China
Abstract:This paper investigates the behaviour of concrete filled steel tubular (CFST) stub columns subjected to eccentric partial compression. Twenty-eight specimens were tested and presented. The main parameters in test program include: (1) section type: circular, square and rectangular; (2) load eccentricity ratio (including uniaxial and biaxial loading): from 0 to 0.4; and (3) shape of the loading bearing plate (BP): circular, square, strip and rectangular. The test results indicated that, similar to the corresponding fully loaded CFST stub columns under eccentric loading, CFST stub columns under eccentric partial compression have generally reasonable bearing capacity and favorable ductility. A finite element analysis (FEA) model for CFST stub columns under eccentric partial compression is developed and the predicted performances are validated through measured results. The FEA model is then used to investigate the mechanisms of such composite columns further.
Keywords:Concrete filled steel tube (CFST)  Stub column  Eccentric loading  Partial compression  Hollow section  Bearing capacity  Ductility  Finite element analysis (FEA)
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