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Static analysis with linear elastic 3D building models – Effects of different modelling types on the vertical load distribution. 3D building models are nowadays a widely used tool for structural analysis in practice. However, the determined load distribution using 3D building models sometimes differs significantly from the results of a conventional calculation with extracted 2D submodels. The background is that the results in a 3D calculation model are obtained with respect to the deformation compatibility in the entire structure, whereas the associated redistribution of stresses is neglected in a calculation with extracted 2D submodels. Using the example of a representative 15-storey reinforced concrete high-rise building with flat slabs and bracing core, different modelling approaches were therefore investigated in order to develop general recommendations for the practical application of holistic 3D building models. This article first shows to what extent the results of a linear-elastic analysis with a 3D building model differ from those of a calculation with extracted 2D submodels. In addition, the influences from the construction progress, the soil-structure interaction, the connection stiffnesses and the stiffness reduction of the slabs through bending crack formation are presented. Further influences on the load distribution in a holistic 3D building model as a result of the time-dependent deformation behavior of concrete (viscoelastic consideration) are discussed in a further contribution of the authors. All in all, the various influences result in significant changes in the vertical load distribution, which are to be regarded in the practical application of 3D building models.
|Translated title of the contribution||Static analysis with linear elastic 3D building models - Effects of different modelling types on the vertical load distribution: Effects of different modelling types on the vertical load distribution|
|Pages (from-to)||360 – 369|
|Number of pages||10|
|Journal||Beton- und Stahlbetonbau|
|Early online date||16 Oct 2020|
|Publication status||Published - May 2021|
ASJC Scopus subject areas
- Building and Construction
Fields of Expertise
- Sustainable Systems
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