2017 Volume 28 Pages 79-91
In this study, the stress transfer mechanism of steel fiber reinforced concrete (SFRC) interior beam-column joints with beam longitudinal headed steel bars was examined by non-linear 3-dimensional FEM analysis. The characteristics of the SFRC material were investigated by flexural testing and FEM analysis. Further, the behavior of headed anchors embedded in SFRC was investigated by pull-out testing and FEM analysis. Next, the behavior of SFRC interior beam-column joints with beam longitudinal headed steel bars was examined analytically using the calibrated results of these FEM analyses. Based on the results obtained, the stress transfer mechanism was identified as a double strut model involving the development of two struts in the beam-column joint under lateral loading. The first strut to be formed connects the compressive parts at the opposite beam ends. The other, subsequently formed, strut connects the compressive part at the beam end to the headed anchors of the beam longitudinal bars.
