As a important tension member, high strength bolts having crucial effect for bearing capacity of grid structure. Especially for in-service engineering, when high strength bolt tensile load doesn’t meet the standard requirements, how to determine the structure bearing capacity influence is particularly important. The article is aimed at the situation of the design review and analysis, through the bearing capacity reduction, reducing the high strength bolt bearing capacity, and the reduction of bearing capacity and the actual force are compared, to determine the safety of the structure. Through the question processing, provides a discussion for solving the similar problems.
Applling Leeb hardness tester D punch, examined the steel hardness by two different ways of clamping method and coupling method respectively, studied the correlation of Leeb hardness and steel strength, compared the research results with related literature and Jiangsu province construction standard of DGJ32/ TJ116-2011. Through the research, the conclusion is larger that this research results and related literature, the reliability is very low which be used to infer steel tensile strength with the D punch testing Leeb hardness .
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