Multidimensional load-bearing behaviour of timber-concrete composite road bridges with consideration of flexibility of connections

Timber-concrete-composite structures for road bridges could be much more often used in the field of medium-span road bridges due to their good ecological and structural performance. Therefore, an appropriate consideration of the punctual connections usually used for such bridges is necessary. Those connectors have a large load-bearing capacity and stiffness. While there are established methods for determining the stiffness and load-bearing capacity in the main longitudinal load- bearing direction, the secondary load-bearing behaviour in transverse and vertical direction is usually not determined for those bridges. By assessing test results and evaluation of FE simulations, this article presents an approach of how a calculation method can be derived that makes the structural design of timber-concrete-composite bridges safely even in more demanding application scenarios.

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