An experimental study of the flexural behavior and shear transfer mechanisms of shallow cellular composite floor beams is presented. Four full-scale specimens were designed and tested. The four composite shallow cellular beams are composed with “asymmetric I” steel section with regularly spaced circular openings along the web and “inverted T” steel section with regularly spaced clothoidal openings along the web. The shear connections are formed by combination of tie-bar elements with the infill concrete passing through openings. The aims of the study are to provide information on the flexural behavior of the shallow cellular composite floor beams, and to assess the shear resisting properties of the proposed shear connections. The tested composite beams showed satisfactory composite behavior and possessed satisfactory horizontal shear resistance. The proposed shear connections significantly increased the shear resistance, slip capacity and ductility of the shear connections. A tentative calculation method of the shear resistance of the proposed shear connections is developed.
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