Holzverbindungen

In order to realise resolved timber structures such as trusses, different joining techniques are required to connect the individual components with each other. Currently, engineering-style timber joints with metal plates and dowels and carpentry-style timber joints are usually used.

In order to minimise the energy-intensive use of steel components, the working group for resource-efficient structural and civil engineering is researching the development of innovative timber-timber connections and experimentally investigating their load-bearing behaviour. The aim of the research is to increase the efficiency of the connection in order to manage with smaller cross-sections of the individual bars. The stiffness, the initial displacement, the onset of failure and the maximum load-bearing capacity are analysed and compared with classic connections such as single and double staggered joints. In addition, the influence of undesirable inaccuracies, which are difficult to avoid in practice, on the load-bearing behaviour is investigated. These inaccuracies can occur, for example, due to swelling and shrinkage when the moisture content changes in different directions. The tolerances permitted by the standard with regard to the cross-sectional dimensions of the individual bars to be joined and the mechanical manufacturing accuracy also have an influence.

The industrial robot of the Institute of Structural Engineering was used to manufacture the test specimens.

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