Abstract
Horizontally lying headed studs allow thin concrete slabs as a concrete flange. Due to the small edge distance of the headed studs to the concrete edge, a reduction in the load-bearing capacity according to DIN EN 1994-2 Annex C is required, in which additional geometric boundary conditions for the required length of the head bolts in the edge position are defined. In this way, a pull-out failure is prevented. These requirements for the minimum length of the head bolts can lead to comparatively long studs, which are in practice uneconomical or not feasible. Load-carrying parameters such as the degree of reinforcement of the shear reinforcement or the concrete strength cannot be applied. On the basis of recent developments in the fastening technology, the possibility should be created to neglect the geometric restrictions and to prove the actual tensile forces occurring in the bolt axis. The aim of the project is the development of an analytical design model for pull-out failure based on experimental and numerical investigations.
Project Team
Institute of Structural Design, University of Stuttgart
Head of the research team:
Prof. Dr.-Ing. U. Kuhlmann
Project preparer: Lena Stempniewski, M.Sc.
Research Funding
Federal Highway Research Institute (BASt)
Project Start
01.09.2017