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Investigation of Proposed Concrete Filled Steel Tube Connections under Reversed Cyclic Loading
Farhad Ahadi Koloo,Armin Badakhshan,Hossein Fallahnejad,Mehdi Ebadi Jamkhaneh,Masoud Ahmadi 한국강구조학회 2018 International Journal of Steel Structures Vol.18 No.1
Concrete-filled steel tube (CFT) columns are used in the primary lateral resistance systems. The objective of this research is to analyse the behavior of the steel beam to CFT column connections. A three-dimensional numerical model for simulating the behavior of CFT connections was developed with the aid of the general purpose nonlinear finite element analysis package ABAQUS. In this paper, 90 CFT connection specimens include simple and moment connections that were tested under reversed cyclic loading. Shear capacity of joint, moment-drift response, energy absorption, and displacement ductility were studied in those models. The results have indicated that, the hysteresis curve of CFT columns was plump; no pinch phenomenon can be found; the damage and degradation degree of the strength and stiffness of specimens is lower; and high energy dissipation capacity can be achieved. Improvement in the behavior of CFT connection depends on the beam characteristics and column features.