Browse > Article

Experimental Study on the Torque Coefficient and Clamping Force of High Strength Bolts Subjected to Environmental Parameters  

Lee, Hyeon Ju (한전 전력연구원)
Nah, Hwan Seon (한전 전력연구원)
Kim, Kang Seok (한전 전력연구원)
Kim, Jin Ho (포항산업과학연구원)
Kim, Jin Man (공주대학교 건축공학과)
Publication Information
Journal of Korean Society of Steel Construction / v.20, no.1, 2008 , pp. 43-53 More about this Journal
Abstract
Because the torque control method, which is also caled the clamping method in domestic construction sites, is affected by a variation of the torque coefficient, quality control of the torque coefficient is essential. This study was focused to evaluate the effects of several environmental factors and errors when installing bolts while tightening high-strength bolts. Conditioning environmental parameters include wet, rusty and exposure-to-air-only conditions. In addition, because of errors in workability such as instalation of two washers, upset washers are selected. During the tests, torque, torque coefficient, tension and angle of nut rotation were obtained using a bolt testing machine. Test specimens of four types of bolts (High-Strength Hexagon bolt on KS B 1010, Torque Shear Bolt on KS B 2819, High-Strength Hexagon bolt coated with zinc, and ASTM 490 bolt) were recomended. Based on test results, the tightening characteristics subjected to environmental parameters were investigated and compared with the results in normal condition.
Keywords
high strength bolt; clamping force; torque; torque coefficient;
Citations & Related Records
연도 인용수 순위
  • Reference
1 김상섭(1995), 고력볼트 및 T/S볼트의 기계적 특성에 관한 연구, 대한건축학회논문집, 제11권 7호, pp.209-217
2 日本建築學會, 鐵骨工事 技術指針/工事現場 施工, 1996
3 ASTM A490, Standard Specification for High Strength Steel Bolts, Classes 10.9 and 10.9.3 for Structural Steel Joints, 2004
4 ASTM F1852, Standard Specification for "Twist off" Type Tension Control Structural Bolt/Nut/Washer Assemblies, Steel Heat Treated, 120/105 KSI Minimum Tensile Strength, 2005
5 Geoffry L. Kulak, John W. Fisher, John H. A. Struik (1987), Guide to Design Criteria for Bolted and Riveted Joints, JOHN WILEY & SONS
6 김진호, 김주연, 한기명, 나환선, 이현주, 김강석(2007), 현장 온도특성을 고려한 고력볼트 체결성능에 대한 실험적 연 구, 한국강구조학회 학술발표논문집, pp.337-342
7 AISC 329, Specification for Structural Joints Using ASTM A325 or A490 Bolts, 2001
8 ASTM F2280, Standard Specification for "Twist off" Type Tension Control Structural Bolt/Nut/Washer Assemblies, Steel Heat Treated, 150 KSI Minimum Tensile Strength, 2005
9 ASTM 606, Standard Test Methods for Determining the Mechanical Properties of Externally and internally threaded Fasteners, Washer, and Rivets, 2007
10 ASTM F959, Standard Specification for Compressible- Washer-Type Direct Tension Indicators for use with Structural Fasteners, 2007
11 김진호, 우해성, 최성모(2003), 고력볼트 마찰접합부의 설계기 준 및 내력에 관한 연구, 대한건축학회논문집 제19권 4 호, pp.27-35
12 김진호(1994), 고력볼트 마찰접합에 관한 기초적 연구, 대한건 축학회논문집, 제10권 10호, pp.251-258
13 ASTM A325, Standard Specification for Structural Bolts, Steel, Heat Treated 830 MPa Minimum Tensile Strength, 2005
14 JASS 6(2007), 建築工事標準仕樣書 鐵骨工事
15 김상섭, 김영호, 김규석(2000), 고력볼트의 여유나사길이에 따 른 조임력 평가 연구, 대한건축학회논문집, 제16권 5호, pp.11-18
16 日本建築學會, 高力ボルト接合設計施工ガイドブック, 2003
17 JSS II 09, 構造用 トルシア形 高力ボルト.六角ナット.平座 金のセット, 日本鋼構造協會, 1981
18 서용표 등(2007), 철골구조물 고력볼트 접합부의 성능향상 기 술 개발 1차년도연구보고서, 연구보고서, 한전전력연구원
19 손승요, 신근하, 안교철, 조인습, 최돈홍(1994), T/S볼트체결 에서 체결력, 토오크 계수 및 품질관리에 관한 연구, 한 국강구조학회논문집, 제6권 3호, pp.117-125
20 김진호, 우해성, 최성모(2002), 고력볼트 마찰접합부 각국 설계 기준의 비교연구, 한국강구조학회 학술발표논문집, pp. 423-430
21 RCSC(2004), Specification for Structural Joints Using ASTM A325 or A490 Bolts