1) The mesh has a central beam running the full length of the bridge. This does not show up in the 3D beam result. I presume that this "edge" did not get meshed as a beam because it is also part of a face. The same applies for the part of the pylons that coincide with the transverse plate girder.
The first eigenmode shows that omission of the pylon section creates a hinge that is not there in reality
2) I get GMSH errors and warnings that I suspect have to do with the fact that some edges are shared between beam and plate???:
Code: Select all
Error : Edges from different entities share vertices: create a finer mesh
Warning : Failed to compute equidistant parameters (relax = 0.0078125, value = -nan) for edge 521-529 parametrized with 150 150 on GEdge 1753