PROBLEM TO BE SOLVED: To suppress a decrease in joint strength between a steel material and a connecting plate due to a high-strength bolt by suppressing deformation of the steel material and the connecting plate in a structure in which a pair of steel materials are connected to each other by using a high-strength bolt and a connecting plate. To do. SOLUTION: In a friction joining structure, a pair of steel materials in which the longitudinal end portions of each other's long plate-shaped portions are arranged to face each other and each plate-shaped portion of the pair of steel materials are overlapped in the thickness direction, and the overlapped portion. Is provided with a connecting plate that is fastened to a plate-shaped portion by a high-strength bolt to connect a pair of steel materials to each other, and a plurality of bolt holes through which the high-strength bolt penetrates are formed in a portion where the steel material connecting plates overlap. , The connection plate is formed with a plurality of oversized holes having a hole diameter larger than the bolt holes or long holes having a minor diameter larger than the bolt holes as through holes through which the high-strength bolt penetrates at positions corresponding to the bolt holes of at least one steel material. At the position where the high-strength bolt penetrates the bolt hole and the through hole, the total cross-sectional area of all the connecting plates along the width direction is equal to or greater than the cross-sectional area of the plate-shaped portion along the width direction. Is. [Selection diagram] FIG. 8
展开▼
