A M YOUSRY1, K V HØISETH1 and J A ØVERLI2
1Department of Structural Engineering, Norwegian University of Science and Technology, Trondheim, Norway
2Department of Civil Engineering, Sør-Trøndelag University College, Trondheim, Norway
3D laser scanning is an efficient technology for rapid and reliable digital documentation in civil and structural engineering. The paper describes scanning as basis for structural modelling, by means of a case study. The practical part of the study deals with the load-carrying capacity of an exhibition hall in natural stone masonry, which could be subjected to differential settlements during renovation. The inner surface of the exhibition hall was scanned. The scan model was used to prepare geometrical input for automatic mesh generation of two different structural models: a volumetric FEM-model and a model made up by shell elements. The procedures used, and the experience gained, in transforming the scanned model into a representation suitable for meshing algorithms, are described. The results of nonlinear analysis showed that the load-carrying capacity of the structure was governed by the tensile strength of the masonry and lateral constraints which are both questionable. Hence, differential settlements during renovation should be avoided.