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Fig. 1. Examples of tapered Concrete Filled Steel Tubes (CFST) columns used in structures.
This and the next image are from:
Qing-Xin Ren (1), Lin-Hai Han (2), Chao Hou (3) and You-Xing Hua (2)
(1) School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, PR China
(2) Department of Civil Engineering, Tsinghua University, Beijing 100084, PR China
(3) School of Civil Engineering, The University of Sydney, Sydney, NSW 2006, Australia
“Experimental behaviour of tapered CFST columns under combined compression and bending”, Journal of Constructional Steel Research, Vol. 128, pp 39-52, January 2017, DOI: 10.1016/j.jcsr.2016.08.005
ABSTRACT: Tapered concrete filled steel tubular (CFST) columns have been used in some spatial structures, however, research on the structural performance of such tapered composite columns under combined compression and bending is relatively seldom, and this paper thus intends to fill this knowledge gap through experimental investigations. A total of twenty-four tapered CFST specimens were tested under combined compression and bending, including twelve square columns and twelve circular ones. The test parameters included sectional type, tapered angle, slenderness ratio and load eccentricity. Typical failure modes, the load versus deformation relations, the strain development of tapered composite members and the influence of significant parameters were evaluated based on the testing results. Finally, simplified design method for predicting the load carrying capacity of tapered CFST column under combined compression and bending was discussed.
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