No abstract

The concept is very flexible and is focused on the automatize CAD-processes. It can be used for large and highly complex geometries. The presented concept is used within the software Siemens NX, which is well suited for this purpose. The publication deals beside the introduction of the concept with working planning for bridges in general, ensure quality for BIM models, geometrical tolerances, data exchange and the linking BIMmodels to full models for static computations. It is successfully tested within several projects. One of these projects is the viaduct of Pleichach, which is currently build by the company Max Bögl.

No abstract

Wave behaviour of line shaped structures can be analysed if they are simply shaped (beams, rods, etc.) and if the frequency or wavelength is within a range where the underlying theories are still applicable. If the frequencies and wavelengths exceed these limits, the modelling of these line or beam shaped structures is only possible using volume elements which results in considerably high computation time and modelling effort. The idea of this work is to keep the beam like modelling of structures but enhance the solution space such that arbitrary but reasonable deflection shapes of the cross section can be covered. The unit deflection shapes are defined and computed on the basis of a 2D finite element mesh of the beam cross section: warpshapes for primary and secondary torsion and shear forces, Eigenmodes for the problem of a plate in membrane and a plate in bending action, derived warpshapes for in plane shapes and shapes which cover the lateral strains. By this transformation of unknowns the number of system degrees of freedom can be reduced considerably. Expensive pre-and postprocessing steps can be done in parallel which opens the gate for massive performance gains. This method was validated in previous publications of the authors and shall now be extended using unit deflection shapes gained from eigenmodes of an infinite Fourier transformed structure obtained by solving a quadratic eigenvalue problem for the wavenumber kx. The results of both methods shall be compared.

No abstract