In this study, a 3D FE model is developed by which one can analyze the composite action in the composite beam subjected to the hogging moment. Analysis results show that the reinforcement ratio and crack behaviour of the slab are main factors which exert a strong influence on the composite action. The existing experimental results, that the design of partial interaction can be more efficient in designing of shear connection of the composite beams, are indirectly verified by the FE analysis.

• 신현섭(한국건설기술연구원 인프라구조연구실 수석연구원) | Shin, Hyun Seop 교신저자