Steel and Composite Structures

  • 제25권1호
  • /
  • Pages.79-92
  • /
  • 2017
  • /
  • 1229-9367(pISSN)
  • /
  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Shear capacity of stud shear connectors with initial damage: Experiment, FEM model and theoretical formulation

  • Qi, Jianan (Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University) ;
  • Wang, Jingquan (Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University) ;
  • Li, Ming (Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University) ;
  • Chen, Leilei (Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University)
  • 투고 : 2016.05.25
  • 심사 : 2017.06.17
  • 발행 : 2017.09.20
⟨ 이전 논문 다음 논문 ⟩

초록

Initial damage to a stud due to corrosion, fatigue, unexpected overloading, a weld defect or other factors could degrade the shear capacity of the stud. Based on typical push-out tests, a FEM model and theoretical formulations were proposed in this study. Six specimens with the same geometric dimensions were tested to investigate the effect of the damage degree and location on the static behavior and shear capacity of stud shear connectors. The test results indicated that a reduction of up to 36.6% and 62.9% of the section area of the shank could result in a dropping rate of 7.9% and 57.2%, respectively, compared to the standard specimen shear capacity. Numerical analysis was performed to simulate the push-out test and validated against test results. A parametrical study was performed to further investigate the damage degree and location on the shear capacity of studs based on the proposed numerical model. It was demonstrated that the shear capacity was not sensitive to the damage degree when the damage section was located at 0.5d, where d is the shank diameter, from the stud root, even if the stud had a significant reduction in area. Finally, a theoretical formula with a reduction factor K was proposed to consider the reduction of the shear capacity due to the presence of initial damage. Calculating K was accomplished in two ways: a linear relationship and a square relationship with the damage degree corresponding to the shear capacity dominated by the section area and the nominal diameter of the damaged stud. This coefficient was applied using Eurocode 4, AASHTO LRFD (2014) and GB50017-2003 (2003) and compared with the test results found in the literature. It was found that the proposed method produced good predictions of the shear capacity of stud shear connectors with initial damage.

키워드

참고문헌

  1. AASHTO (2014), Bridge Design Specifications; American Association of State Highway and Transportation Officials, Washington, DC, USA.
  2. EC4 1994 (1994), Design of composite steel and concrete structures.
  3. GB/T11263-2010 (2010), Hot rolled H and cut T section steel; Beijing, China.
  4. GB50017-2003 (2003), Code for design of steel structures; Beijing, China.
  5. Goble, G.G. (1968), "Shear strength of thin flange composite specimens", Eng. J., 5(2), 62-65.
  6. Han, Q., Wang, Y., Xu, J., Xing, Y. and Yang, G. (2017), "Numerical analysis on shear stud in push-out test with crumb rubber concrete", J. Constr. Steel Res., 130, 148-158. https://doi.org/10.1016/j.jcsr.2016.12.008
  7. Hiragi, H., Matsui, S. and Fukumoto, Y. (1989), "Derivation strength equations of headed stud shear connectors-static strengths", Struct. Eng., 35(3), 1221-1232.
  8. Lam, D. and EI-Loboby, E. (2005), "Behavior of Headed Stud Shear Connectors in Composite Beam", J. Struct. Eng., 131(1), 96-107. https://doi.org/10.1061/(ASCE)0733-9445(2005)131:1(96)
  9. Liu, Y. and Alkhatib, A. (2013), "Experimental study of static behaviour of stud shear connectors", Can. J. Civil Eng., 40(9), 909-916. https://doi.org/10.1139/cjce-2012-0489
  10. Ju, X. and Zeng, Z. (2015), "Study on uplift performance of stud connector in steel-concrete composite structures", Steel Compos. Struct., Int. J., 18(5), 1279-1290. https://doi.org/10.12989/scs.2015.18.5.1279
  11. Nie, J.G. and Cai, C.S. (2003), "Steel-Concrete Composite Beams Considering Shear Slip Effects", J. Struct. Eng., 129(4), 495506.
  12. Oehlers. D.J. (1989), "Splitting induced by shear connectors in composite beams", J. Struct. Eng., 115(2), 341-362. https://doi.org/10.1061/(ASCE)0733-9445(1989)115:2(341)
  13. Oehlers. D.J. and Coughlan, C.G. (1986), "The shear stiffness of stud shear connections in composite beams", J. Constr. Steel Res., 6(4), 273-284. https://doi.org/10.1016/0143-974X(86)90008-8
  14. Oehlers D.J. and Park, S.M. (1992), "Shear connectors in composite beams with longitudinally cracked slabs", J. Struct. Eng., 118(8), 2004-2022. https://doi.org/10.1061/(ASCE)0733-9445(1992)118:8(2004)
  15. Okada, J., Yoda, T. and Lebet, J.P. (2006), "A study of the grouped arrangements of stud connectors on shear strength behavior", Struct. Eng./Earthq. Eng., 23(1), 75s-89s. https://doi.org/10.2208/jsceseee.23.75s
  16. Ollgaard, J., Slutter, R.G. and Fisher, J.W. (1971), "The strength of stud shear connection in lightweight and normal-weight concrete", Eng. J., 8(2), 55-64.
  17. Pallares, L. and Hajjar, J.F. (2010), "Headed steel stud anchors in composite structures, Part I: Shear", J. Constr. Steel Res., 66(2), 198-212. https://doi.org/10.1016/j.jcsr.2009.08.009
  18. Pathirana, S.W., Uy, B., Mirza, O., Mirza, O. and Zhu, X.Q. (2015), "Strengthening of existing composite steel-concrete beams utilising bolted shear connectors and welded studs", J. Constr. Steel Res., 114, 417-430. https://doi.org/10.1016/j.jcsr.2015.09.006
  19. Rong, X.L., Huang, Q. and Ren, Y. (2013), "Experimental study on static and fatigue behaviors of stud connectors for composite beams after corrosion", China Civil Eng. J., 46(2), 10-18. [In Chinese]
  20. Salari, M.R., Shing, P.B. and Frangopol, D.M. (1998), "Nonlinear analysis of composite beams with deformable shear connectors", J. Struct. Eng., 124(10), 1148-1158. https://doi.org/10.1061/(ASCE)0733-9445(1998)124:10(1148)
  21. Slutter, R.G. and Driscoll, G.C. (1965), "Flexural strength of steel concrete composite beams", J. Struct. Div., 91(2), 71-99.
  22. Su, Q., Yang, G. and Bradford, M.A. (2014), "Static behaviour of multi-row stud shear connectors in high-strength concrete", Steel Compos. Struct., Int. J., 17(6), 967-980. https://doi.org/10.12989/scs.2014.17.6.967
  23. Viest, I.M. (1956), "Investigation of stud shear connectors for composite concrete and steel T-beams", ACI J., 27(8), 875-981.
  24. Xing, Y., Han, Q., Xu, J., Guo, Q. and Wang, Y. (2016), "Experimental and numerical study on static behavior of elastic concrete-steel composite beams", J. Constr. Steel Res., 123, 7992.
  25. Xu, C. and Sugiura, K. (2013), "Parametric push-out analysis on group studs shear connector under effect of bending-induced concrete cracks", J. Constr. Steel Res., 89, 86-97. https://doi.org/10.1016/j.jcsr.2013.06.011
  26. Xu, C., Sugiura, K., Wu, C. and Su, Q.T. (2012), "Parametrical static analysis on group studs with typical push-out tests", J. Constr. Steel Res., 72, 84-96. https://doi.org/10.1016/j.jcsr.2011.10.029
  27. Xu, C., Sugiura, K., Masuya, H., Hashimoto, K. and Fukada, S. (2014), "Experimental study on the biaxial loading effect on group stud shear connectors of steel-concrete composite bridges", J. Bridge. Eng., 20(10), 04014110. DOI: 10.1061/(ASCE)BE.1943-5592.0000718
  28. Xue, W.C., Ding, M., Wang, H. and Luo, Z.W. (2008), "Static behavior and theoretical model of stud shear connectors", J. Bridge Eng., 13(6), 623-634. https://doi.org/10.1061/(ASCE)1084-0702(2008)13:6(623)
  29. Xue, D., Liu, Y., and Yu, Z. and He, J. (2012), "Static behavior of multi-stud shear connectors for steel-concrete composite bridge", J. Constr. Steel Res., 74, 1-7. https://doi.org/10.1016/j.jcsr.2011.09.017

피인용 문헌

  1. Behavior of grouped stud shear connectors between precast high-strength concrete slabs and steel beams vol.34, pp.6, 2017, https://doi.org/10.12989/scs.2020.34.6.837
  2. Static behavior of stud shear connectors with initial damage in steel-UHPC composite bridges vol.9, pp.4, 2017, https://doi.org/10.12989/acc.2020.9.4.413
  3. Shear behavior of large stud shear connectors embedded in ultra-high-performance concrete vol.23, pp.16, 2020, https://doi.org/10.1177/1369433220939208
  4. Experimental study on the hybrid shear connection using headed studs and steel plates vol.37, pp.6, 2020, https://doi.org/10.12989/scs.2020.37.6.649
  5. Application of a newly puzzle shaped crestbond rib shear connector in composite beam using inverted T steel girder: An experimental study vol.79, pp.1, 2021, https://doi.org/10.12989/sem.2021.79.1.117