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S. Fasching, J. Kollegger:
"Building bridges using thin-walled concrete elements and post-tensioning";
Talk: fib congress 2018 - better, smarter, stronger, Melbourne; 2018-10-07 - 2018-10-11; in: "Proceedings for the 2018 fib congress", (2018), ISBN: 978-1-877040-14-6; 3588 - 3593.

In the construction of large box girder bridges either precast segmental erection methods or methods
with in-situ placing of the concrete like incremental launching or balanced cantilever are used. An
innovative construction method was recently proposed at TU Wien. In this new method prefabricated
thin-walled elements are connected to each other with the aid of post-tensioning tendons, to form a
bridge girder. This lightweight bridge girder can than be moved to its final position with a
construction method like for example incremental launching, the balanced lift method or by crane.
Once the girder has reached its final position pumped in-situ concrete is added first to the flanges
and then to the webs of the girder. This approach is advantageous for bridge construction methods,
which show large differences in the bending moment distribution along the bridge girder during the
individual construction stages and the final state. By a reduction of the deadweight in constructionstages,
the required amounts of concrete and post-tensioning tendons can be reduced, and more
efficient bridge structures can be built. An example for the usage of thin-walled precast elements to
build a plate girder shows that construction with such elements is suitable for building bridges.