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A study on behavior of steel joints that combine high-strength bolts and fillet welds

  • Chang, Heui-Yung (Department of Civil and Environmental Engineering, National University of Kaohsiung) ;
  • Yeh, Ching-Yu (Department of Civil Engineering, National Cheng Kung University)
  • 투고 : 2018.11.09
  • 심사 : 2019.03.31
  • 발행 : 2019.05.25

초록

In recent years, considerable attention has been paid to the research and development of high-strength steel plates, with particular emphasis on the enhancement of the seismic resistance of buildings and bridges. Many efforts have also been undertaken to improve the properties of high-strength bolts and weld materials. However, there are still different opinions on steel joints that combine high-strength bolts and fillet welds. Therefore, it is necessary to verify the design specifications and guidelines, especially for newly developed 1,400-MPa high-strength bolts, 570-MPa steel plates, and weld materials. This paper presents the results of literature reviews and experimental investigations. Test parameters include bolt strengths, weld orientations, and their combinations. The results show that advances in steel materials have increased the plastic deformation capacities of steel welds. That allows combination joints to gain their maximum strength before the welds have fracture failures. When in combination with longitudinal welds, high-strength bolts slip, come in contact with cover plates, and develop greater bearing strength before the joints reach their maximum strength. However, in the case of combinations with transverse welds, changes in crack angles cause the welds to provide additional strength. The combination joints can therefore develop strength greater than estimated by adding the strength of bolted joints in proportion to those of welded joints. Consequently, using the slip resistance as the available strength of high-strength bolts is recommended. That ensures a margin of safety in the strength design of combination joints.

키워드

과제정보

연구 과제 주관 기관 : National Center for Research on Earthquake Engineering (NCREE) in Taiwan, Ministry of Science and Technology (MOST) in Taiwan

참고문헌

  1. AIJ (2012), Recommendation for Design of Connections in Steel Structures, Architectural Institute of Japan (AIJ), Tokyo, Japan. [In Japanese]
  2. AISC (1999), Load and Resistance Factor Design Specification for Structural Steel Buildings, American Institute of Steel Construction (AISC), Chicago, IL, USA.
  3. AISC (2005), Design Specification for Structural Steel Buildings, American Institute of Steel Construction (AISC), Chicago, IL, USA.
  4. AISC (2016), Design Specification for Structural Steel Buildings, American Institute of Steel Construction (AISC), Chicago, IL, USA.
  5. Brunesi, E., Nascimbene, R. and Rassati, G.A. (2014), "Response of partially-restrained bolted beam-to-column connections under cyclic loads", J. Construct. Steel Res., 97(6), 24-38. https://doi.org/10.1016/j.jcsr.2014.01.014
  6. European Committee for Standardisation (CEN) (2012), EN 1993-1-8: Design of joints.
  7. Kang, L., Suzuki, M. and Ge, H. (2018), "A study on application of high strength steel SM570 in bridge piers with stiffened box section under cyclic loading", Steel Compos. Struct., Int. J., 26(5), 583-594.
  8. Lian, M., Su, M. and Guo, Y. (2017), "Experimental performance of Y-shaped eccentrically braced frames fabricated with high strength steel", Steel Compos. Struct., Int. J., 24(4), 441-453.
  9. Manuel, T.J. and Kulak, L.G. (1998), "Strength of joints that combine bolts and welds", Struct. Eng. Report; Department of Civil & Environmental Engineering, University of Alberta, Edmonton, Canada.
  10. Manuel, T.J. and Kulak, L.G. (2000), "Strength of joints that combine bolts and welds", J. Struct. Eng., ASCE, 126(3), 279-287. https://doi.org/10.1061/(ASCE)0733-9445(2000)126:3(279)
  11. Masuda, H., Jinbo, H., Tanaka, A. and Ueki, T. (2001), "Experimental study of the behavior of combined joints using fillet welding and high strength bolts", J. Struct. Constr. Eng., AIJ, 66(543), 145-152. [In Japanese]
  12. Nah, H.-S. and Choi, S.-M. (2017), "Estimation on clamping load of high strength bolts considering various environment conditions", Steel Compos. Struct., Int. J., 24(4), 399-408.
  13. Oztekin, E. (2015), "Reliabilities of distances describing bolt placement for high strength steel connections", Struct. Eng. Mech., Int. J., 51(1), 149-168. https://doi.org/10.12989/sem.2015.54.1.149
  14. Sabbagh, A.B., Petkovskia, M., Pilakoutas, K. and Mirghaderi, R. (2013), "Cyclic behaviour of bolted cold-formed steel moment connections: FE modelling including slip", J. Construct. Steel Res., 80(1), 100-108. https://doi.org/10.1016/j.jcsr.2012.09.010
  15. Sato Toru Leo (2000), "Strength of joints that combine high strength bolts and longitudinal welds", M. Eng. Report; Department of Civil & Environmental Engineering, University of Alberta, Edmonton, Canada.
  16. Uno, N., Kubota, M., Nagata, M., Tarui, T., Kanisawa, H., Yamasaki, S., Azuma, K. and Miyagawa, T. (2008), "Super High Strength Bolt, $SHTB^{(R)}$", Nippon Steel Tech. Rep., 97, 95-104.
  17. Yang, X. and Lei, H. (2017), "Constant amplitude fatigue test of high strength bolts in grid structures with bolt-sphere joints", Steel Compos. Struct., Int. J., 25(5), 571-579.

피인용 문헌

  1. Effect of welding defects on mechanical properties of welded joints subjected to temperature vol.40, pp.2, 2019, https://doi.org/10.12989/scs.2021.40.2.193