F10T M30高力ボルトに適用するナット回転法および降雨時締付けに関する基礎的検討

抄録

In this study, an axial force introduction test and a relaxation test were conducted to examine the nut rotation angle that keeps the introduced axial force of the F10T M30 high-strength bolt within the elastic range. Then, using the elastic region nut rotation method, we conducted an axial force introduction test assuming rainfall. As a comparative study, we assumed that the torque method and the conventional nut rotation method were used for tightening in rain, and investigated the effect of temperature and the presence or absence of lubricant during tightening on the introduced axial force.