Failure Analysis of Damaged High-Strength Bolts under Seismic Action Based on Finite Element Method

Damage of high-strength bolt (DHSB) is inevitable during long-term use. Such damage irreversible that may not be replaced in time, and the potential danger proven by changes mechanical properties DHSB. To investigate DHSB, this paper uses software ABAQUS to simulate stress various types DHSB under earthquake, compares with undamaged bolts (UDHSB). The results show most unfavorable position crack at bottom second ring thread. model shorter length will have greater concentration displacement deformation. more number cracks, concentrated value. generated tooth deformation top thread tooth, tooth. Changing shape appropriate beneficial reduce degree damage. Bolt double harm, timely replacement damaged very time-sensitive necessary.