Experimental investigation of preload losses in high strength bolts under cyclic loading
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2021
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Slip-resistant shear connections with preloaded bolts have traditionally been used in steel
structures exposed to cyclic. Hence, shear load is transferred through friction surfaces
rather than through contact between the bolt surface and the hole. The main influencing
parameters determining slip resistance of the connection are the friction between contact
surfaces and the bolt preload level. This paper presents an experimental study of preloaded
bolted connections under cyclic load, the main objective being to investigate the influence
of cyclic load on the losses of preload force in high strength bolts and lock bolts.