Vol.22, No.3, 2022, pp. 267–270
UDC:

The first welded bridge in Romania was modelled according to its last technical project. The 3D model used for the expertise was imported into a 3D programme to adjust the structure and prepare it for 3D printing. Only the main elements are preserved on the structure: upper flange, lower flange, struts, side members, lattice beams. Secondary elements as parapet, sidewalk consoles are removed from the 3D structure for an easier layout of the model. The paper presents the process of creating the 3D model of the First Welded Bridge in Romania through the FDM. The model is made of 4 distinct PET segments which are joined together. In order to obtain the components, it was necessary to do FEM remodelling of structural dimensions of the bridge as well as adjusting these dimensions to a scale of 1/25. The resulting model has a size of 1.25 m. The paper shows the printing parameters of the model and the testing of some model components.

Keywords: fused deposition modelling (FDM), welding, bridge prototype