NATM 1 Structure of joints of the steel beams in the upper and lower ground reinforcing shear force with the combination of projection and acceptance plate in the NATM

摘要

In the NATM method, the present invention is fastened by means of a symmetrical pre-fastening bolt with respect to the joint part of the steel support member, but at this time, the structure is stable with respect to the bending moment of the ground force, but there is a shortage of the shear force, and the shortage of the shear area While the size is less than or equal to the size of the shear area of the one fastening bolt, on the premise of the pre-fastening bolts of the symmetric structure, in the state that the pre-fastening bolts are maintained, only the “one set of additional fastening bolts” of the symmetric structure It is an invention that enables efficient and economical expansion and reinforcement for the shortfall in shear area by a simple structure by forming a shear reinforcement part.