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Experimental and Analytical studies on Failure Behavior of Stud Shear Connectors in CFT Structures  

Lee, Sangyoon (Structural Engineering Research Division of Korea Institute of Construction Technology)
Publication Information
Journal of the Society of Disaster Information / v.9, no.4, 2013 , pp. 400-412 More about this Journal
Abstract
For the composite behavior of steel tube and inner concrete, the shear connectors should be applied to the CFT structures. However, the present design codes don't provide the design criteria that can be applied on shear connectors in the CFT structures typically filled with plain concrete. This study has been carried out to propose design criteria (shear strength and resistance factor) for the stud shear connectors in CFT structures. Experimental tests using the push-out specimens with the plain concrete blocks and finite element analysis were conducted for the purpose of verifying the main failure mode to propose the shear strength of studs in CFT structures. From the results of this study, the main failure mode of studs in CFT structures is splitting crack of concrete and this failure mode reduces shear strength of studs in CFT structures relatively to those embedded in RC blocks.
Keywords
Stud shear connector; Push-out test; Finite element analysis; Concrete filled tube; CFT; Plain concrete; Failure mode;
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