earticle

영어

This study experimentally evaluated the clamping force loosening performance of a newly developed Torque-Shear Nut (TSN) under transverse cyclic loading, comparing its performance to conventional high-strength bolts (HT) and torque-shear bolts (TSB). Customized load cells recorded real-time axial forces during testing, considering two bolt sizes (M16 and M20) and four displacement amplitudes (0.5, 1.0, 1.5, and 2.0 mm) as main variables. All bolt types showed a rapid initial loss followed by stabilization; At small displacements (0.5–1.0 mm), more than 95% of the initial preload was maintained. At larger displacements (1.5–2.0 mm)residual preload reduced to about 75–80%. In contrast, Overall, the TSN demonstrated performance equivalent to or slightly superior to that of HT and TSB, confirming its practical applicability as an alternative fastening system that provides stable and reliable clamping force retention in steel structural connections subjected to cyclic transverse loading.