Vol. 18, No. 4, pp. 763-772 (2022)
PERFORMANCE EVALUATION OF INNOVATIVE COCONUT PALM STEM
SHAPED STUD SHEAR CONNECTOR FOR COMPOSITE STRUCTURES
Rahul Tarachand Pardeshi 1, * and Yogesh Deoram Patil 2
1 Research Scholar, Sardar Vallabhbhai National Institute of Technology, Surat, India
2 Associate Professor, Sardar Vallabhbhai National Institute of Technology, Surat, India
* (Corresponding author: E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.)
Received: 8 March 2022; Revised: 13 May 2022; Accepted: 14 May 2022
DOI:10.18057/IJASC.2022.18.4.4
 View Article |
Export Citation: Plain Text | RIS | Endnote |
ABSTRACT
Headed studs are the more frequently employable shear connectors in composite structures. Despite its prevalence, this connector has exhibited remarkable drawbacks, prominently the shear failure at the bottom of the shank. In this research, three novel coconut palm stem (CPS) shaped studs are proposed for composite constructions, aiming to improve the shear capacity and slip performance of the connection. The traditional circular headed stud (CHS) geometry has been restructured to a proposed CPS-shaped stud while maintaining total steel material volume to be the same. Pushout tests were experimentally performed on CHS and CPS-shaped shear connectors to investigate their performance evaluation for ultimate strength, stiffness, ductility, and failure mode. Moreover, the Abaqus/Explicit has been employed to model a pushout specimen. A proposed finite element model was successfully validated with the test results for further parametric analysis. Two distinct grades of concrete and three CPS shapes were considered for the parametric investigation. Finally, three formulas were developed and proposed to predict the shear capacity of the CPS-shaped stud. The performance of the CHS and CPS-shaped stud connections was compared, revealing that the proposed CPS-shaped studs offer 37 to 47% higher shear strength, double stiffness, and slip with better ductility. So, CPS-shaped stud may substitute the traditional headed stud shear connectors in steel-concrete composite structures with added strength, stiffness, and ductility.
KEYWORDS
Composite structures, Headed stud shear connectors, Pushout test, Concrete slab-steel beam, CPS-shaped stud, Abaqus
REFERENCES
[1] Ahn J.H., Kim S.H., and Jeong Y.J., “Shear behaviour of perfobond rib shear con-nector under static and cyclic loadings,” Magazine of Concrete Research, 60(5), 347–357, 2008, doi: 10.1680/macr.2007.00046.
[2] Viest I.M., “Investigation of stud shear connectors for composite concrete and steel T-beams,” ACI Journal Proceedings, 52(4), 875–892, 1956, doi: 10.14359/11655.
[3] Shariati A S.M., Sulong NHR, and Suhatril M., “Various types of shear connectors in composite structures: A review,” International Journal of the Physical Sciences, 7(22), 2876–2890, 2012, doi: 10.5897/IJPSX11.004.
[4] Mirza O., and Uy B., “Effects of strain regimes on the behaviour of headed stud shear connectors for composite steel-concrete beams,” Advanced Steel Construc-tion, 6(1), 635–661, 2010.
[5] Ding Y., Dai X.M., and Yan J.B., “Developments and behaviors of slip-released novel connectors in steel-concrete composite structures,” Advanced Steel Con-struction, 15(1), 30–36, 2019, doi: 10.18057/IJASC.2019.15.1.5.
[6] Spremic M., Markovic Z., Veljkovic M., and Budjevac D., “Push-out experiments of headed shear studs in group arrangements,” Advanced Steel Construction, 9(2), 139–160, 2013, doi: 10.18057/IJASC.2013.9.2.4.
[7] Yin Z., Feng D., Yang B., and Pan C., “The seismic performance of double tube buckling restrained brace with cast steel connectors,” Advanced Steel Construction, 18(1), 436-445, 2022, doi: 10.18057/IJASC.2022.18.1.2
[8] Nouri K., Sulong N.H.R., Ibrahim Z., and Shariati M., “Behaviour of novel stiff-ened angle shear connectors at ambient and elevated temperatures,” Advanced Steel Construction, 17(1), 28-38, 2021, doi:10.18057/IJASC.2021.17.1.4.
[9] Ding Y., Dai X., and Yan J., “Developments and behaviors of slip-released novel connectors in steel-concrete composite structures,” Advanced Steel Construction, 15(1), 30-36, 2019, doi: 10.18057/IJASC.2019.15.1.5 30
[10] Pardeshi R.T., Singh P.A., and Patil Y.D., “Performance assessment of innovative concave type shear connector in a composite structure subjected to push-out load-ing,” Materials Today: Proceedings, 2022, doi:10.1016/j.matpr.2022.03.262
[11] Tian L., Liu T., Li T., and Lin H., “Shear resistance of novel perforated shaped steel-engineered cementitious composite (ECC) connectors,” Advanced Steel Con-struction, 16(1), 30-36, 2020, doi: 10.18057/IJASC.2020.16.1.4 30
[12] Tabet-Derraz M.I., Khelil A., Hamdaoui K., Boumechra N., and Abdallah M., “Ex-perimental and numerical study of an innovative OMEGA-shaped connector for composite beams,” Structures, 32(8), 279–297, 2021, doi: 10.1016/J.ISTRUC.2021.02.050.
[13] Pardeshi R.T., and Patil Y.D., “Review of various shear connectors in composite structures,” Advanced Steel Construction, 17(4), 394–402, 2021, doi: 10.18057/IJASC.2021.17.4.8.
[14] Xu C., Sugiura K., Wu C., and Su Q., “Parametrical static analysis on group studs with typical push-out tests,” Journal of Constructional Steel Research, 72(6), 84–96, 2012, doi: 10.1016/J.JCSR.2011.10.029.
[15] Cao J., Shao X., Deng L., and Gan Y., “Static and fatigue behavior of short-headed studs embedded in a thin ultrahigh-performance concrete layer,” Journal of Bridge Engineering, 22(5), p. 04017005, 2017, doi: 10.1061/(asce)be.1943-5592.0001031.
[16] Cao J., and Shao X., “Finite element analysis of headed studs embedded in thin UHPC,” Journal of Constructional Steel Research, 161(10), 355–368, 2019, doi: 10.1016/J.JCSR.2019.03.016.
[17] Shim C.S., Lee P.G., and Yoon T.Y., “Static behavior of large stud shear connectors,” Engineering Structures, 26(12), 1853–1860, 2004, doi: 10.1016/j.engstruct.2004.07.011.
[18] Goble and George. G., “Shear strength of thin flange composite specimens,” Engi-neering Journal, American Institute of Steel Construction, 5, 62–65, 1968.
[19] Eurocode 4, Design of composite steel and concrete structures - Part 1-1: General rules and rules for buildings. London, 2004.
[20] Nasrollahi S., Maleki S., Shariati M., Marto A., and Khorami M., “Investigation of pipe shear connectors using push out test,” Steel and Composite Structures, 27(5), 537–543, 2018, doi: 10.12989/scs.2018.27.5.537.
[21] Kumar P. and Chaudhary S., “Effect of reinforcement detailing on performance of composite connections with headed studs,” Engineering Structures, 179(1), 476–492, 2019, doi: 10.1016/J.ENGSTRUCT.2018.05.069.
[22] Kumar P., Patnaik A., and Chaudhary S., “Effect of bond layer thickness on behav-iour of steel-concrete composite connections,” Engineering Structures, 177(12), 268–282, 2018, doi: 10.1016/J.ENGSTRUCT.2018.07.054.
[23] Xue W., Ding M., Wang H., and Luo Z., “Static behavior and theoretical model of stud shear connectors,” Journal of Bridge Engineering, 13(6), 623–634, 2008, doi: 10.1061/(asce)1084-0702(2008)13:6(623).
[24] Anderson N.S., and Meinheit D.F., “Steel capacity of headed studs loaded in shear,” RILEM Symposium on Connections Between Steel and Concrete, Illinois, USA, 202–211, 2001.
[25] ABAQUS, “Abaqus user’s manual version 2019,” Dassault Systèmes Simulia Corp.: Providence, RI, USA. 2019.
[26] Nguyen H.T., and Kim S.E., “Finite element modeling of push-out tests for large stud shear connectors,” Journal of Constructional Steel Research, 65(10–11), 1909–1920, 2009, doi: 10.1016/J.JCSR.2009.06.010.
[27] Pavlović M., Marković Z., Veljković M., and Bucrossed D.S.D., “Bolted shear con-nectors vs. headed studs behaviour in push-out tests,” Journal of Constructional Steel Research, 88(9), 134–149, 2013, doi: 10.1016/J.JCSR.2013.05.003.
[28] Rice J.R., and Tracey D.M., “On the ductile enlargement of voids in triaxial stress fields,” Journal of the Mechanics and Physics of Solids, 17(3), 201-2017, 1969, doi: 10.1016/0022-5096(69)90033-7
[29] Eurocode 2, Design of concrete structures - Part 1-1: General rules and rules for buildings. London, 2002.
[30] Ellobody E., Young B., and Lam D., “Behaviour of normal and high strength con-crete-filled compact steel tube circular stub columns,” Journal of Constructional Steel Research, 62(7), 706–715, 2006. doi: 10.1016/J.JCSR.2005.11.002.
[31] Wang T. and Hsu T.T.C., “Nonlinear finite element analysis of concrete structures using new constitutive models,” Computers & Structures, 79(32), 2781–2791, 2001. doi: 10.1016/S0045-7949(01)00157-2.
[32] GB50017-2003, Code for design of steel structure. Beijing, 2003.
[33] AISC, ANSI/AISC 360-05 specification for structural steel buildings. Chicago, Illinois, 2005.
[34] JSCE, Committee of steel structure: Standard specifications for steel and composite structures (Design edition). Tokyo, Japan, 2007.