Masterarbeit, Minyi Wang, TU München, 2012
Due to practical reasons, bridges have always been designed with two dimensional plans
in the past hundreds of years. Thanks to the development of computer technology, more
and more powerful 3D CAD systems are available today, enabling the design of
architectures in three dimensions. Compared to the conventional 2D design method, 3D
modeling shows great advantages and increases the efficiency of bridge design. During
the past several years, construction companies, engineering consulting firms and research
institutes have been trying to apply three dimensional models in bridge design.
However,despite of the rapid development, 3D bridge modeling technologies are far not mature,
and there is still great potential for improvements.
This thesis develops a 3D modeling approach, which enables the object-oriented
modeling of constructions and realizes consistent model changes through the use of parameters.
For the implementation of this work, a mechanical engineering specialized
CAD system Siemens NX7.5 has been chosen, which is able to completely support
parametric 3D modeling.
In this work, different bridge types in practice have been studied at first, and then one
bridge type is chosen as the basis for parametric modeling. After that, the possibility of
directly importing alignment and terrain information from the civil design software ProVI
into Siemens NX7.5 has been studied and realized, which serves as the basis of the
modeling. For that purpose an interface between the two programs has been developed.
Based on a rigid frame bridge, the principles and the process of the modeling are
presented. Besides, the possibility of deriving company specialized 2D plans from the 3D
models has been studied and realized.