Numerical Analysis of Historical Reinforced Concrete Shell

This article is focused on the numerical analysis of the historical structure of the reinforced concrete shell. Shells form the roof of the tram depot. It was built in the 50s of the 20th century. The shells are conoid shaped with a control curve in the form of a catenary. The construction of the depot began to show excessive deformation and lose its stability. At present, the depot is out of service and the shells are temporarily supported. This prompted the commissioning of a diagnostic survey and numerical analysis of the structure. The diagnostic research revealed the quality and strength of the concrete, the reinforcement of the structure, the actual thickness of the shells, the structure of the roof cladding and defects in the structure (cracks, etc.) At the same time, the bottom surface of the whole structure was scanned with a 3D scanner and selected points of the structure were measured by geodetic methods. Numerical analysis focused on one shell at the edge of the depot structure. The model was created in Atena 3D software. The main aim of the analysis was to determine the behavior of the structure under load and to predict the ways of its deformation for different loading methods to determine the possible reason for the current deformed shape. Consequently, compare these predicted behaviors with the real deformed structure, whether its deformation corresponds to normal behavior.