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2nd World Congress and Exhibition on Construction and Steel Structure

Las Vegas, USA

Ju-young Hwang

Ju-young Hwang

Korea Advanced Institute of Science and Technology
South Korea

Title: Numerical Evaluation of Resistance Capacity for CFT Columns

Biography

Biography: Ju-young Hwang

Abstract

CFT column has a lot of structural advantages due to the composite behavior between in-filled concrete and steel tube. This paper deals with the resistance capacity of CFT columns by numerical method with developed bond-slip model between in-filled concrete and steel tube which can simulate the behavior of CFT without changing mechanical properties. Since the applied axial load to in-filled concrete is delivered to steel tube by the confinement effect and the friction, the governing equation related to the slip behavior can be constructed on the basis of the force equilibrium and the compatibility conditions. Developed model is described behavior of CFT to take into account this effect of bond-slip to calculate confinement effect of in-filled concrete by steel tube. Correlation studies between numerical results and experimental data are conducted to verifying the efficiency of the introduced numerical model and evaluation of resistance capacity for various types of CFT columns are conducted.