| 摘要 |
PURPOSE: High-strength connection structure of a bolt without fireproof materials is provided to improve tensile strength at a high temperature of 650 deg. C, and to reduce construction cost and period without covering the refractory materials. CONSTITUTION: H-beams(1a,1b) are combined by outer additional plates(1a), inner additional plates(2b) and side additional plates(2c) and high-strength bolts(3). The connection structure of the high-strength bolt has the tensile strength(TS) of 1200 N/mm2 or higher at room temperature, and satisfies the relation that the shear proof stress at high temperature of 650 deg. C is not less than {coefficient of slip at room temperature(mu)*design bolt tension(N0) } / {safety factor for long term load(nu)*cross-sectional area of bolt shank(bAs)}.
|
