عنوان مقاله [English]
Even though composite columns in buildings and other structures have been used widely more than 50 years and also this procedure is increasing worldwide, likewise very common in practice to either neglect the synergetic contribution of either the steel or the concrete or to treat the synergetic action is a simplistic manner. The efficient utilizing the composite columns requires different theory on behavior between composite and steel or concrete columns in design process. Current code provisions (i.e. AISC,-2010 EC-4,-2004 BS-5400-2005) have filled many gaps in the design of composite elements such as columns. Therefore, in this paper, comparison between strength of concrete filled steel tube column (CFT) that obtained from experimental test specimens with predicted strength column by the existing design codes AISC-2010, EC-2004 and BS-5400-2005. The results showed EC-4-2004 code with respect to two other codes indicates more close results relative to the experimental results.