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Experimental investigations assessed shear resistance in bolted connections, suggesting design rules need updates.
The design of non-preloaded bolted connections as bearing type connections (category A) in normal round holes is specified in DIN EN 1993-1-8 for carbon steel bolts and DIN EN 1993-1-4 for stainless steel bolts. However, in steel construction, oversized round holes, as well as short and long slotted holes, are frequently used in addition to normal round holes. Despite this, the design rules for bearing type connections made of carbon and stainless steel according to DIN EN 1993-1-8 and DIN EN 1993-1-4 are only defined for bolted connections in normal round holes. To address this lack of knowledge, experimental investigations were conducted to assess the influ- ence of the clearances of round holes on the bolt shear resistance for bolts M16 made of carbon and stainless steel. The results indicate that the load-bearing capacities for hole clearances of 1 mm and 5 mm are comparable and fall within the natural scatter range of shear resistance.
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Ehrhardt et al. (2025) studied this question.
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