INNOVATIVE TIMBER JOINTS BY MODELLING THE STIFFNESS FOR HIGH-PERFORMANCE WOODEN STRUCTURES MADE OF HARD- AND SOFTWOOD
High-performance timber structures require an in-depth knowledge on the deformation be-haviour of joints. Innovative timber joints are made up of different "components" that can be put together according to the desired properties of the joints. The component method is appropriate for the optimisation of timber joints and for the determination of the connection stiffness, which is required above all in today's common use of computer-based methods for the calculation of internal forces and verification in design. However, for hardwoods no systematic investigations of the deformation behaviour of dowel-type connections exist yet. This lack of knowledge represents an obstacle to the expansion of the use of timber as a material in engineering structures and im-pairs the competitiveness of timber construction compared to other constructions.
The aim of the project is to significantly increase the data base on connection deformation behaviour through experimental investigations on 172 dowel-type connections in beech laminated veneer lumber (beech LVL) in order to estimate the load-deformation behaviour more precisely also for the application of FE modelling. By processing and making available the research results for practice and standardisation, as well as developing guidelines for an economical and safe application of the connection stiffness in timber construction, the design of even demanding engineering load-bearing structures can be simplified.
Prof. Dr.-Ing. Ulrike Kuhlmann
Institute of Structural Design (KE), University of Stuttgart
Ministerium für Ernährung, Ländlichen Raum und Verbraucherschutz Baden-Württemberg within the framework of the „Holzbau-Offensive BW“