Due to its high compressive strength and extremely dense microstructure, Ultra-High Performance Concrete (UHPC) allows the design and construction of very light-weight, slender structural members. This also applies to composite beams with so-called external reinforcement, where the steel flange on the underside of the concrete section acts solely as a tension member. The longitudinal shear between the external reinforcement and the thin UHPC web is carried by composite dowels with very low concrete cover. Based on the results of experimental and numerical investigations on push out specimens and composite beams, design and construction guidelines for the application of composite dowels in slender composite beams with thin UHPC webs have been developed, as presented in this thesis.
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Due to its high compressive strength and extremely dense microstructure, Ultra-High Performance Concrete (UHPC) allows the design and construction of very light-weight, slender structural members. This also applies to composite beams with so-called external reinforcement, where the steel flange on the underside of the concrete section acts solely as a tension member. The longitudinal shear between the external reinforcement and the thin UHPC web is carried by composite dowels with very low concr...
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