Abstract
The main objective of the project is to analyse the fatigue behaviour of timber-concrete composite beams (TCC-Beams) with notched connections. Firstly, the transferability of accepted methods and procedures in design of steel and steel-concrete-composite constructions should be reviewed. An appropriate fatigue verification will be derived in order to allow for the practical application of this connection in road bridges and other types of constructions with relevant fatigue loading. This project is carried out in close collaboration with the TU Braunschweig (Prof. Sieder). At the TU Braunschweig fundamental investigations of the fatigue properties of self-drilling full thread screws will be carried out.
The verification process, which originally was derived for steel- and steel-concrete-composite beams will be studied. This design process is based on S-N-Curves and the linear damage accumulation hypothesis by Palmgren and Miner. It will be checked if this process is also applicable for notched connections in TCC-beams or whether additional limitations are necessary. Therefore, preliminary studies will be conducted to identify possible effects of sequential arrangements in variable amplitude spectrum and the remaining bearing capacity after a cyclic testing for a number of cycles without fracture. The foreseen investigations on the fatigue behaviour of notched connections within this research project should enable a safe and efficient use of this kind of connections.
Project Team
Institut für Konstruktion und Entwurf, Universität Stuttgart
Leiterin der Forschungsstelle:
Prof. Dr.-Ing. U. Kuhlmann
Simon Mönch, M.Sc
Institut für Baukonstruktion und Holzbau (iBHolz), TU Braunschweig
Leiter der Forschungsstelle:
Prof. Dr.-Ing. Mike Sieder
Peter Niebuhr, M.Sc
Project Funding
DFG (Deutsche Forschungsgemeinschaft, German Research Foundation)
Project Duration
04/2018 - 06/2021