STABILITY OF METAL STRUCTURE OF PALLET RACKING FRAME

The issues of analyzing the stability of frames of prefabricated pallet racks are considered. Pallet racks are adapted to the minimum possible size of the usable space they occupy, as well as to provide convenient access to stored goods. The need to place the maximum number of cargoes in a minimum warehouse area places high demands on the design and calculation methods of both racking systems as a whole and their individual constituent elements. The purpose of the work is to conduct research on the stability of the frame, which is one of the main structural elements of the metal structure of the entire pallet rack. For this purpose, a combined design scheme for metal structures has been developed, containing 3-dimensional solid bodies, thin-walled shell structures and beam structures. The diagram takes into account the design features of the racks, frame braces, thrust bearings, as well as the main design features of the bolted connections connecting these elements. A finite element approach is proposed as a research method, allowing to fully take into account all the design features of the constituent elements and the nature of their connection in a prefabricated structure. Studies have been conducted of the effect of bolted connections of braces with racks on the stability of both an individual rack and the entire frame. An analysis of various types of bracing systems for the stability of the metal frame structure was carried out. As a result of the research, ways to increase the stability of racking systems using the possibility of their structural restructuring due to the properties of prefabricated units were assessed. It was found that the presence of bolted connections qualitatively changes the behavior of racks of open cross-section during loss of stability.