A Nonlinear FEM Analysis of Connections Between Concrete Filled Steel Tube Columns and H-Beams

콘크리트충전(充塡) 각형강관(角形鋼管) 기둥과 H형강 보 접합부(接合部)의 비선형 유한요소해석

The analytical studies included nonlinear finite element analysis of split-tee connection details subjected to axial load and lateral load. A three-dimensional model of the connections between CFT columns and H-beams has been developed. Both initial geometrical imperfections and residual stresses are taken into consideration. A geometrically nonlinear load-displacement analysis of the structure containing the imperfection is then performed, using the Riks method. Analytical results are compared with existing experimental results. Extensive parametric analyses are carried out to investigate the relation of the connections between CFT columns and H-beam to various parameters such as the axial load, column width-thickness ratio, and split-tee thickness.