| Title |
Design Code and Resistance Capacity for the Slip-Critical Connections of High Strength Bolts |
| Authors |
Kim Jin-Ho ; Woo Hae-Sung ; Choi Sung-Mo |
| Keywords |
High Strength Bolts ; Slip-Critical Connections ; Clamping Force ; Slip Coefficient ; Surface Conditions ; Allowable Shear Stress |
| Abstract |
In a slip-resistant joint, the external applied load acts in a plane perpendicular to the bolt axis. The load is completely transmitted by frictional forces acting on the contact area of the plates fastened by bolts. This frictional resistance is dependent on the bolt pre-load and slip resistance of the faying surfaces. In Korean Design Code for Steel Structures, allowable design capacities for slip-resistant connections with high strength bolts were decided based on an unique value 0.45, the slip coefficient. However, the slip factors are affected by various surface conditions, hole clearances, strengths of connected plates, bolt's grade and pre-tensioning methods. The tests of this study were performed to clarify a friction behavior of slip-resistance connections in accordance with various bolt's assembly conditions. Based on test results and a comparison studies with foreign codes, the purpose of this paper is to suggest a direction of a revision and/or modification for Slip Coefficients and Design Resistance Capacity for Slip-resistant Connections with High Strength Bolts of the Code. |