High-strength bolts are typically not specifically designed for frictional resistance in the same way that friction bolts are. High-strength bolts are engineered to provide structural integrity and load-bearing capacity through direct tension or shear, rather than relying primarily on frictional resistance.
Here's how high-strength bolts differ from friction bolts:
Load Transfer Mechanism:
High-strength bolts transfer loads through direct tension or shear across their cross-sectional area. The threads of high-strength bolts are designed to withstand tensile forces and prevent the bolt from breaking under load.
Friction bolts, on the other hand, primarily rely on frictional resistance generated between the bolt and the surrounding material to transfer loads. The expansion mechanism of a friction bolt creates friction against the walls of the drilled hole, providing anchorage and support.
Installation:
High-strength bolts are typically installed by tightening nuts on threaded ends to achieve the desired tension, clamping structural members together securely.
Friction bolts are installed by inserting them into pre-drilled holes and then expanding an anchor or shell at the end of the bolt to create frictional resistance against the walls of the hole.
Applications:
High-strength bolts are commonly used in construction and engineering applications where structural connections require high tensile or shear strength, such as in building frames, bridges, and machinery.
Friction bolts are often used in ground support applications in mining, tunneling, and rock engineering to stabilize loose or fractured rock formations by creating frictional support against potential collapse.
