An assessment of the load-bearing capacity of the bolted connection of a steel roof girder
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Czestochowa University of Technology
Publication date: 2021-12-21
Zeszyty Naukowe Politechniki Częstochowskiej seria Budownictwo 2021;27(1):172-176
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ABSTRACT
In this study, the non-preloaded bolted connection of a roof girder, commonly used in steel halls with
a frame system, was analyzed. Two options were considered: a connection before reinforcement and one
reinforced by adding a new row of bolts. For both of the analyzed variants, analytical calculations were
performed based on the component method and numerical calculations using the Finite Element Method.
The load capacity of the connection was checked before and after reinforcement. A large convergence of the
calculation results for both methods was demonstrated. It was confirmed that the proposed reinforcement
of the existing joint of the roof girder (by adding an new row of bolts) easily increases its load capacity
(for the analyzed case, the load capacity of the connection increased by approx. 28%). Such a reinforcement
can be performed under load, with minimal interference to the existing joint, and the high deformability
(elongation ability) of the bolts used allows for a full redistribution of internal forces in the reinforced joint.