복합신소재구조학회 논문집 (Journal of the Korean Society for Advanced Composite Structures)

  • 제5권3호
  • /
  • Pages.8-16
  • /
  • 2014
  • /
  • 2093-5145(pISSN)
  • /
  • 2288-0232(eISSN)
한국복합신소재구조학회 (Korean Society for Advanced Composite Structures)
권호 표지
DOI QR코드

DOI QR Code

토크전단형 고력볼트의 토크계수 변동에 따른 체결축력 확보방안에 관한 연구

A Study on the Secure Plan of Clamping Force according to the Variation of Torque-Coefficient in Torque-Shear High Strength Bolts

  • 이현주 (한국전력공사 전력연구원) ;
  • 나환선 (한국전력공사 전력연구원) ;
  • 최성모 (서울시립대학교 건축학부)
  • 투고 : 2014.09.01
  • 심사 : 2014.09.19
  • 발행 : 2014.09.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Torque control method and turn of nut method are specified as clamping method of high strength bolts in the steel construction specifications. Quality control of torque coefficient is essential activity because torque control method, which is presently adopted as clamping method in domestic construction sites, is affected by variation of torque coefficient. The clamping of torque shear bolt is based on KS B 2819. It was misunderstood that the tension force of the TS bolt was induced generally at the break of pin-tail specified. However, the clamping forces on slip critical connections do not often meet the intended tension, as it considerably varies due to torque coefficient dependent on the environmental factors and temperature variables despite the break of the pin tail.This study was focused to evaluate the effect of environmental factors and errors of installing bolts during tightening high strength bolts. The environmental parameters were composed of 'wet' condition, 'rust' condition, 'only exposure to air' condition. And the manufacture of trial product was planned to identify the induced force into the bolts. The algorithm for a trial product was composed of the relation between electricity energy taken from torque shear wrench and tension force from hydraulic tension meter.

키워드

참고문헌

  1. ASTM F 2280-06 (2006), Twist Off Type Tension Control Structural Bolt/Nut/Washer Assemblies, Steel, Heat Treated, 150ksi Minimum Tensile Strength, ASTM International, Philadelphia, PA, USA.
  2. ASTM F959M, Standard Specification for Compressible-Washer-Type Direct Tension Indicators for use with Structural Fasteners, ASTM International, Philadelphia, PA, USA.
  3. Kim, J. H. (2001). An Experimental Study on the Structural Behavior in Friction Type Bolted Joints Clamping by F13T Grade High Strength Bolt, Journal of Architectural Institute of Korea, Vol. 17, No. 2, pp. 53-61.
  4. Lee, H. J., Nah, H. S., Kim, K. S., Kim, j. h., and Kim, J. M. (2008). "Experimental Study on the Torque Coefficient and Clamping Force of High Strength Bolts Subjected to Environmental Parameters", Journal of Korean Steel Structure, KSSC, Vol. 20, No. 1, pp. 43-53.
  5. Nah, H. S., Lee, H. J., and Choi, S. M. (2014), "Evaluating long-term relaxation of high strength bolts considering coating on slip faying surface", Steel and Composite Structures, Vol. 16, No. 6, pp. 703-718. https://doi.org/10.12989/scs.2014.16.6.703
  6. Nah, H. S., Lee, H. J., Ryoo, J. Y., and Choi, S. M. (2012), "Estimation of Long Term Clamping Force of High Strength Bolts By Coating Thickness Parameters of Slip Faying Surfaces", J. Korean Soc. Adv. Comp. Struc. Vol. 3, No. 1, pp.8-15. https://doi.org/10.11004/kosacs.2012.3.1.008
  7. Nah, H. S., and Lee, H. J. (2012), "Evaluation on Clamping Force of High Strength Bolts by Coating Parameters of Faying Surfaces", Corrosion science and technology. Vol. 11, No. 2, pp.48-56. https://doi.org/10.14773/cst.2012.11.2.048
  8. Nah, H. S., Lee, H. J., Kim, K. S., Kim, J. H., and Kim, W. B. (2010), "Evaluating Relaxation of High-strength Bolts by Parameters on Slip Faying Surfaces of Bolted Connections", International Journal of Steel Structures, Vol. 10, No. 3, pp. 295-303. https://doi.org/10.1007/BF03215838
  9. Nah, H. S., Lee, H. J., Kim, K. S., Kim, J. H., and Kim, W. B. (2009a), "Method for Estimating the Clamping Force of High Strength Bolts Subjected to Temperature Variation", International Journal of Steel Structures, Vol. 9, No. 2, pp. 123-130. https://doi.org/10.1007/BF03249487
  10. Nah, H. S., Lee, H. J., Kim, K. S., Kim, J. H., and Kim, W. B. (2009b), "Evaluation of Slip Coefficient of Slip Critical Joints with High Strength Bolts", Structural Engineers & Mechanics, Vol. 32, No. 4, pp. 477-488. https://doi.org/10.12989/sem.2009.32.4.477
  11. Nah, H. S., et al. (2007), "Development a Technology of Improving Performance on Bolted Connection of Steel Structure", Research Report, Korea Electric Power Research Institute
  12. RCSC Committee (2004), Specification for Structural Joints Using ASTM A325 or A490 Bolts, AISC Inc., Chicago, Illinois, USA.