Abstract
Cold-formed steel (CFS) storage rack structures are extensively used in various industries to store products in safe and secure warehouses before distribution to the market. Thin-walled open profiles that are typically used in storage rack structures are prone to loss of stability due to different buckling modes such as local, distortional, torsional and flexural, or any interaction between these modes. In this paper, an efficient way of increasing ultimate capacity of upright frames under compression load is proposed using bolts and spacers which are added externally to the section with certain pitches along the height. Hereinto, experimental tests on 81 upright frames with different thicknesses and different heights were conducted, and the effect of employing reinforcement strategies was examined through the failure mode and ultimate load results. Non-linear finite element analyses were also performed to investigate the effect of different reinforcement spacing on the upright performance. The results showed that the reinforcement method could restrain upright flange and consequently increase the distortional strength of the upright profiles. This method can also be effective for any other light gauged steel open section with perforation. It was also observed that the reinforcement approach is much more useful for short length upright frames compared to the taller frames.
Highlights
By increasing the speed of development in various industries, there is a need for well-engineered warehousing systems to store the products in safe and secure warehouses before they are distributed to the market
Some specimens, it wasframes relatively to detect which mode of Compression tests wereFor performed on the upright withdifficult two different thicknesses and five failure is dominant since the interaction of two or three buckling modes had occurred
The displacement value shows the deformation of the top head of the upright measured by linear variable differential transformer (LVDT)
Summary
By increasing the speed of development in various industries, there is a need for well-engineered warehousing systems to store the products in safe and secure warehouses before they are distributed to the market. For this purpose, cold-formed steel (CFS) storage rack structures have widely been developed to be used in different industries. The stability of uprights in racking systems becomes more critical under extreme loading scenarios [3,4,5,6].
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