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http://dx.doi.org/10.11112/jksmi.2011.15.6.127

An Evaluation of Clamping Characteristics for High Strength Bolts with Variable Bolt Lengths  

Lee, Kang Min (충남대학교 건축공학과)
Kim, Kang Seok (한전 대전충남본부)
Nah, Hwan Seon (한전 전력연구원)
Lee, Hyeon Ju (한전 전력연구원)
Oh, Kyung Hwan (삼성물산(주) 건설부문)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.15, no.6, 2011 , pp. 127-134 More about this Journal
Abstract
It has been reported that the length parameter of high strength bolts results in the variance in tensile loads. The required turn of nut for each length is specified in AISC RCSC specification. There is no specific regulation datum about the bolt length in the two national codes and specifications in Korea. Therefore this study focused on evaluating influence of the clamping torque subjected to length parameter of high strength bolts. Two types of high strength bolt specimens were manufactured and tested; High Strength Hexagon bolt specified in ASTM A490 and Torque Shear Bolt in KS B 2819. The length parameter ranged from 60mm(3d) to 140mm(7d). The torque, turn of nut, and the clamping force were analyzed to review whether length parameter affects on the required tensile strength. To evaluate the effects of the length parameter on the torque and turn of nut for the required strength and clamping force, statistical analysis was also carried out.
Keywords
High strength bolt; Length parameter; Tension; Torque; Turn of nut;
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