The subject of the bulletin is the problem of damage to the floor slab in the plate-column system, which was caused by overloading within the inner or outer plate. The publication contains a description of the model study on a 1: 2 scale, made at the Department of Building Structures of the Silesian University of Technology, which is a continuation of work on the behavior of a similar structure in an emergency situation caused by the removal of one of the poles.
In tensile work, it is important that the reinforcing bars are continuous and well anchored in adjacent slabs or supports. The tensile work increases the board's capacity to deform, and after the occurrence of a failure increases its load capacity. So the tensile work can be a useful mechanism to prevent a catastrophe occurring at the moment of local overloading of the structure. Particular attention should be paid to the elements that during tensile work with large deformations cause high tensile forces that affect the rest of the structure (this problem is described in the Technical Bulletin No. 6). These forces must be appropriately transferred to the columns. In addition, it is necessary to ensure sufficient rigidity of the support system in the plane of the resulting axial forces. In panel-column structures, this stiffness is ensured by external rigid ceiling discs. In this case, the structure is able to hang damaged structural elements on the pillars.
prof. dr hab. inż. Włodzimierz Starosolski
dr inż. Barbara Wieczorek
dr inż. Mirosław Wieczorek
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