LONG-TERM AXIAL FORCE CALCULATION METHOD OF FASTENED HIGH-STRENGTH BOLT IN CONSIDERATION OF AXIAL FORCE LOSS AMOUNT CAUSED BY CREEP PHENOMENON ON COATED SURFACE

摘要

PROBLEM TO BE SOLVED: To provide a long-term axial force calculation method of a fastened high-strength bolt in consideration of an axial force loss amount caused by a creep phenomenon on a coated surface, capable of determining accurately whether a design proof stress of the high-strength bolt is proper or not.;SOLUTION: In this long-term axial force calculation method of the fastened high-strength bolt in consideration of the axial force loss amount caused by the creep phenomenon on the coated surface, after fastening a friction joint of the high-strength bolt, a creep stress of the high-strength bolt after elapse of a prescribed time is calculated by expression (1) (a, b: constants, t: time).;COPYRIGHT: (C)2011,JPO&INPIT