In comparison to conventional calculations with extracted submodels, the static analysis with holistic 3D building models increases the efficiency and the prediction accuracy. In detail, a holistic 3D building model considers the interaction between vertical and horizontal structural elements, providing deformation compatibility in the entire structure. Furthermore, the 3D modelling reduces the error-prone interfaces between the extracted submodels and it can also be integrated into Building Information Modelling (BIM) with a high degree of automation. However, the calculated load distributions of 3D building models are sensitive to the selected modelling method.
The following thesis presents systematic investigations regarding the influences of different modelling methods on the vertical load distribution in a 15-storey reinforced concrete high-rise building. The investigated modelling methods include the construction process, the connection stiffness between structural elements, the soil-structure-interaction, the stiffness reduction due to cracking and the time-dependent deformation behaviour of concrete considering the internal restraint by the provided reinforcement. The findings provide recommendations for the practical application of holistic 3D building models.