Degradation Behavior of the Preload Force of High-Strength Bolts after Corrosion

Corrosion significantly affects the structural behavior of members in a connection (i.e., thickness steel plates, preload force bolts, and friction factor plates). Safety assessment corroded frames beam-to-column connection, beams, or columns) has been major concern engineering. In this work, an experiment accelerated corrosion testing is carried out to obtain specimens connected with high-strength bolts (PF-HSB) monitored throughout whole stage testing. Before testing, PF-HSB caused by stress relaxation also recorded. The decreases rapidly first five hours after final screwing it keeps stable 100 h. seriously affected corrosion, which 30.0% original when rate plate reaches 3.5%. A finite element method for predicting proposed. An estimation model considering established. degradation suggested, good agreement experimental data. results research are great significance safety in-service structures.