Anwendungsregeln für Slim-Floor-Träger unter Berücksichtigung von Sicherheit, Funktionalität und Nachhaltigkeit

Slim-floor beams as composite beams partially embedded in concrete allow for an especially shallow construction height with however long spans. The aim of the European project “SlimAPP – slim-floor beams – Preparation of Application rules in view of improved safety, functionality and LCA” was to increase the competitiveness of steel constructions in buildings by developing the application of slim-floor beams through improved rules for safety, functionality and LCA. Within a holistic approach considering all aspects of optimal technical and sustainable design, special focus is given to the composite action by concrete dowels with reinforcing bars as efficient shear connectors. For normal design, where slim-floor solutions are currently not covered in Eurocode 4, the application of existing design rules was checked and new rules especially in view of the shear connectors developed. Supported by examples of “pilot” projects the design methodology for ultimate limit state (ULS) and Serviceability limit state (SLS), is explained and based on a lifecycle assessment (LCA) different composite slim-floor solutions are compared with each other.