engleski

The calculation resistance model uncertainty of composite beams in bending with partial shear interaction

The subject of research in this work are composite steel and concrete beams in building with partial shear connection and ductile headed stud connectors. Composite beam is made of hot-rolled I steel sections and normal weight concrete slab. Different degrees of shear connection are observed. The procedure of determining the resistance of composite beams in bending with partial shear interaction is iterative and tedious. Four different calculation resistance models of various authors for non-iterative determining the resistance of such cross sections in bending are analysed. This paper compares bending resistances of cross-section with partial shear interaction obtained from laboratory testing and different calculation models on the deterministic level. Uncertainity analysis for different calculation resistance models is reached in the second step on the probabilistic level. Calculated reliability indices beta are compared with target values according to EN 1990. The result is the most certain non-iterative calculation resistance model of cross section in bending for the beam with partial shear interaction for use in buildings.

composite beam; bending; resistance model; uncertainty; partial shear interaction

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