Abstract
Circular (CHS) or rectangular hollow sections (RHS) are economical profile shapes for the execution of filigree, wide-span trusses. This is due to their direction-independent resistance and stiffness values, their low risk of buckling and their high torsional resistance. In particular, the use of hollow sections made of high-strength steels could lead to economical lightweight structures. The design of hollow sections joints made of high-strength steels is currently being redefined in the revision of Eurocodes 3 in Parts 1-8. Due to the lack of test results, it is intended to meet the safety requirement by means of high reduction (Cf-) factors. Consequently, the economic use of high strength steels is strongly limited or no longer available. It is planned that the Cf-factors can be readjusted in the national application documents. This project focuses on establishing the basis for the formulation of a corresponding National Annex to the future German edition of EN 1993-1-8 and to derive specific recommendations.
The research project is intended to derive differentiated and verified reduction factors for the determination the load-bearing capacity of hollow sections joints made of high-strength steels. Furthermore practical recommendations for the consideration of secondary bending moments are to be developed. It must be ensured that the recommendations are sufficiently conservative but at the same time economical and represent practicable regulations that are manageable in practice. In order to achieve this goal, large-scale test on trusses with K-Joints and Test on X-Joint as well as numerical investigations are to be carried out.
Project Team
Munich University of Applied Sciences
Laboratory for Steel and Lightweight Structures
Prof. Dr.-Ing. Imke Engelhardt, Joscha Weinert M.Eng.
Karlsruhe Institute of Technology (KIT)
Research Institute for Steel, Wood and Stone
Prof. Dr.-Ing. Thomas Ummenhofer, Dr.-Ing. Philipp Weidner
University of Stuttgart
Institute of Structural Design
Prof. Dr.-Ing. Ulrike Kuhlmann, Wigand Knecht M.Sc.
CCTH - KoRoH GmbH
Center of competence for tubes and hollow sections
Dr.-Ing. Stefan Herion, Dr.-Ing. Oliver Fleischer
Feldmann + Weynand Consulting Engineers GmbH
Dr.-Ing. Klaus Weynand
Franz Prebeck GmbH & Co. KG
Florian Prebeck
Stahlbau Wegscheid GmbH
Franz Gottinger
Project Funding
BMWi / Funding project WIPANO
Project Start
01.04.2021