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Title: Strength deformation behaviour of circular concrete filled steel tubes subjected to pure bending
Authors: Chitawadagi, M.V.
Narasimhan, M.C.
Issue Date: 2009
Citation: Journal of Constructional Steel Research, 2009, Vol.65, 44082, pp.1836-1845
Abstract: The strength deformation behaviour of circular steel tubes filled with different grades of concrete under flexure is presented. The effects of steel tube thickness, the cross sectional area of concrete, strength of in-filled concrete and the confinement of concrete on moment capacity and curvature of Concrete Filled steel Tubes (CFTs) are examined. Measured flexural strengths are compared with the values predicted by EC4-1994 and LRFD-AISC-1999 code provisions. A total of ninety nine specimens, all one metre long, were tested with concrete fills of 20, 30 and 40 N/mm2 characteristic strength and with D / t ratio 22.3 to 50.8. Based on the experimental results, an interaction model to predict moment and curvature of the CFT sample is developed. 2009 Elsevier Ltd. All rights reserved.
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