Code Calculations for Local Stability of Shaft Guides

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Steel structures for a conveyance guiding system are subjected to prolonged, intense corrosion during their operation leading to a considerable loss of material and structure capacity reduction. Shaft guides are made of closed profiles welded from hot-rolled channel sections. These profiles are categorized as class 1 cross-sections according to Eurocode 3, which means that they are resistant to local instability upon bending [1]. With an increase in the corrosion loss of the guides, the inertia moment of the cross-section is reduced. The resistance of profiles to local buckling is also reduced. However, calculations for local stability in guides upon bending are not required by the local Polish regulations on the operation of conveyance in shafts [2]. The question is whether this constitutes a shortcoming and risk for safe operation. Calculations according to steel construction standards [1] supported by numerical simulation were used to evaluate shaft steelwork guides resistance to buckling and their sensitivity to corrosion loss. It was shown that the guides of corrosion loss of 52–63%, depending on profile size, are prone to local buckling.

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  • [1] PN-EN 1993-1-1 (2006). Design of steel structures. General rules and rules for buildings. Eurocode 3.

  • [2] Ordinance of the Minister of Economy on Occupational Safety Regulations Traffic and Specialist Fire Precautions in Underground Mines of June 28 2002 as amended (Journal of Laws No. 139 item 1169 Journal of Laws No. 124 Item 863 2006 Journal of Laws No. 126 item 855 2010).

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  • [5] Ministry of Mining and Energy Energy and Mechanics Department Instructions on concession design and calculations for hoisting installation Katowice 1963

  • [6] Ordinance of the Minister of Industry and Trade on Occupational Safety Regulations Traffic and Specialist Fire Precautions in Underground Mines of April 14 1995 (Journal of Laws No. 67 item 342).

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  • [9] BN-78/1727-22 (1978) Shaft guides. Steel guide channels.

  • [10] Dassault Systèmes Simulia Corp. (2017) Abaqus Analysis User’s Manual.

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