engleski

Numerical Investigation of Shear Connection in Cold‐ formed Steel‐concrete Composite Beam

Researches show that composite systems made by combining cold-formed steel (CFS) elements and concrete can produce excellent properties compared to traditional solutions. One of the solution which employs CFS elements and concrete is the subject of research within the LWT-FLOOR project. The LWT-FLOOR system consists of built-up CFS beams with corrugated web, connected by spot welds and concrete slab with an innovative shear connection. This paper presents a numerical investigation of two types of shear connections suitable for the proposed composite solution. One type of shear connection is completed using bolts which provide a direct shear connection between the flange profiles of the steel girder and the concrete slab. The second type of shear connection is achieved using a composite dowel rib connector realised through a steel beam corrugated web. In this case, the connection between the profiles of the steel beam and the concrete flange is realised indirectly, i.e., through spot welds between C profiles and corrugated web. The results of FE simulations indicate that a solution with bolts ensures higher shear, but reduces its ductility. These results provide the basis for the conduction of experimental push-out tests of the proposed shear connection types.

spregnuti nosač ; hladnooblikovani čelik ; točkasti zavar ; sastavljeni profil ; moždanici od betona ; demontažni moždanici

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