@article{FeuchtWaldschmittLangeetal.2022, author = {Feucht, Thilo and Waldschmitt, Benedikt and Lange, J{\"o}rg and Erven, Maren}, title = {Additive manufacturing of a bridge in situ}, volume = {15}, journal = {Steel Construction: Design and Research}, number = {2}, publisher = {Ernst \& Sohn}, address = {Berlin}, issn = {1867-0539}, doi = {https://doi.org/10.1002/stco.202100045}, pages = {100 -- 110}, year = {2022}, abstract = {Additive manufacturing (AM) is playing an increasing role in the production of complex steel structures. Robot- or machine-guided gas-shielded metal arc welding (GMAW), known as wire and arc additive manufacturing (WAAM), is suitable for this purpose. A small footbridge was designed in shell form at TU Darmstadt. It was completely additively manufactured over a stream on site using a welding robot. The work called for cantilevered manufacturing without support structures, which poses special challenges in manufacturing. This paper describes selected aspects of this project: the preliminary strength studies, the manufacturing strategy to ensure homogeneous manufacturing and the findings from on-site manufacturing. In addition, investigations were carried out which led to a notable increase in the deposition rate with the right choice of gas and wire.}, language = {en} }