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Title |
Estimation of Safety and Economical Efficiency of Large High Tension Bolted Joints
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Keywords |
고장력볼트 ; 마찰이음 ; 미끄러짐 계수 ; 대직경 고장력볼트 ; 경제성 high tension bolt ; frictional joint ; slip coefficient ; large high tension bolt ; economical efficiency |
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Abstract |
This study was conducted for the purpose of examinating the safety and economical efficiency of large high tension bolted joints. The specimen using F10T-M30 large high strength bolts has been selected and static tensile test has been conducted to evaluate the slip characteristics. In addition, finite element analysis has been carried out to estimate the number of required bolts. As a result, the average slip coefficient of M30 high strength bolts exceeded 0.4 - the standard in highway bridge design specification - and has satisfied the slip strength, which is the same as that of M22 high strength bolts. In addition, if F13T-M22 high strength bolts were applied, the number of required bolts decreased by 21%, and if F10T-M30 high strength bolts were applied, the number of required bolts decreased by 46%, that leads to the conclusion that the economical efficiency in accordance with diametering of high strength bolts was now verified.
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