Vol. 17, No. 1, pp. 28-38 (2021)
BEHAVIOUR OF NOVEL STIFFENED ANGLE SHEAR CONNECTORS AT AMBIENT
AND ELEVATED TEMPERATURES
Karim Nouri 1, *, N H Ramli Sulong 1, 2, Zainah Ibrahim 1, * and Mahdi Shariati 1
1 Department of Civil Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, W.Persekutuan Kuala Lumpur, Malaysia
2 School of Civil & Environmental Enginnering, Science & Engineering Faculty, Queensland University of Techenology, 2 George St, Brisbane QLD 4000, Australia
*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.; This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.; This email address is being protected from spambots. You need JavaScript enabled to view it.)
Received: 16 February 2020; Revised: 15 October 2020; Accepted: 26 October 2020
DOI:10.18057/IJASC.2021.17.1.4
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ABSTRACT
This paper presents experimental studies to investigate the behaviour of stiffened angle shear connectors subjected to isothermal fire loading. Push-out tests were conducted on 48 specimens covering various geometries of stiffened angle shear. The specimens were initially heated at room temperature, which gradually increased to target temperatures, and loaded up to failure for the assessment of their shear resistance at high temperatures. The behaviour of these connectors at ambient and high temperatures was compared. Results showed that the full-length stiffened angle shear connectors exhibited higher shear resistance compared with the half-length ones, whereas the ductility of the half-length stiffened shear connectors was greater than that of the full-length ones; the connector fracture governed the failure mode. Although heating exerted a substantially destructive effect on the resistance of the shear connectors, it led to increased ductile behaviour.
KEYWORDS
Stiffened Shear Connector, Composite, Angle, Monotonic Loading, Elevated Temperature, Ambient Temperature
REFERENCES
[1] Viest, I.M., et al., Composite construction design for buildings. 1997: McGraw-Hill New York.
[2] Viest, I. Investigation of stud shear connectors for composite concrete and steel T-beams. in Journal Proceedings. 1956.
[3] Hegger, J., S. Rauscher, and C. Goralski, Push-out tests on headed studs in high-strength concrete. Special Publication, 2005. 228: p. 769-786.
[4] Manual, S.C., American institute of steel construction. Inc., Thirteenth Edition, First Print, 2005.
[5] Slutter, R.G. and G.C. Driscoll Jr, Flexural strength of steel and concrete composite beams. 1963.
[6] Hawkins, N.M. and D. Mitchell, Seismic response of composite shear connections. Journal of Structural Engineering, 1984. 110(9): p. 2120-2136.
[7] Tahmasbi, F., et al., Shear capacity of C-shaped and L-shaped angle shear connectors. PloS one, 2016. 11(8): p. e0156989.
[8] Shariati, M., N.R. Sulong, and M.A. Khanouki, Experimental assessment of channel shear connectors under monotonic and fully reversed cyclic loading in high strength concrete. Materials & Design, 2012. 34: p. 325-331.
[9] Shariati, M., et al., Comparison of behaviour between channel and angle shear connectors under monotonic and fully reversed cyclic loading. Construction and Building Materials, 2013. 38: p. 582-593.
[10] Shariati, M., et al., Behaviour of C-shaped angle shear connectors under monotonic and fully reversed cyclic loading: An experimental study. Materials & Design, 2012. 41: p. 67-73.
[11] Shariati, M., et al., Fatigue energy dissipation and failure analysis of angle shear connectors embedded in high strength concrete. Engineering Failure Analysis, 2014. 41: p. 124-134.
[12] Maleki, S. and S. Bagheri, Behavior of channel shear connectors, Part I: Experimental study. Journal of Constructional Steel Research, 2008. 64(12): p. 1333-1340.
[13] Maleki, S. and S. Bagheri, Behavior of channel shear connectors, Part II: Analytical study. Journal of Constructional Steel Research, 2008. 64(12): p. 1341-1348.
[14] Maleki, S. and M. Mahoutian, Experimental and analytical study on channel shear connectors in fiber-reinforced concrete. Journal of Constructional Steel Research, 2009. 65(8-9): p. 1787-1793.
[15] O'Connor, M. and D. Martin, Behaviour of a multi-storey steel framed building subjected to fire attack. Journal of Constructional Steel Research, 1998. 1(46): p. 295.
[16] Sanad, A., et al., Composite beams in large buildings under fire—numerical modelling and structural behaviour. Fire Safety Journal, 2000. 35(3): p. 165-188.
[17] Mäkeläinen, P. and Z. Ma, Fire resistance of composite slim floor beams. Journal of constructional steel research, 2000. 54(3): p. 345-363.
[18] Mirza, O. and B. Uy, Behaviour of headed stud shear connectors for composite steel–concrete beams at elevated temperatures. Journal of Constructional Steel Research, 2009. 65(3): p. 662-674.
[19] Rodrigues, J.P.C. and L. Laím, Experimental investigation on the structural response of T, T-block and T-Perfobond shear connectors at elevated temperatures. Engineering structures, 2014. 75: p. 299-314.
[20] Rodrigues, J.P.C. and L. Laím, Behaviour of perfobond shear connectors at high temperatures. Engineering Structures, 2011. 33(10): p. 2744-2753.
[21] Fuh-Gwo, Y. and R.E. Miller, A new finite element for laminated composite beams. Computers & structures, 1989. 31(5): p. 737-745.
[22] Shariati, M., et al. Experimental and analytical study on channel shear connectors in light weight aggregate concrete. in Proceedings of the 4th international conference on steel & composite structures. 2010.
[23] Shariati, M., et al. Behavior of channel shear connectors in normal and light weight aggregate concrete (experimental and analytical study). in Advanced Materials Research. 2011. Trans Tech Publ.
[24] Shariati, A., et al., Investigation of channel shear connectors for composite concrete and steel T-beam. International journal of physical sciences, 2012. 7(11): p. 1828-1831.
[25] Shariati, A., N. RamliSulong, and M. Shariati, Various types of shear connectors in composite structures: A review. International journal of physical sciences, 2012. 7(22): p. 2876-2890.
[26] Shariati, M., et al. Fatigue energy dissipation and failure analysis of channel shear connector embedded in the lightweight aggregate concrete in composite bridge girders. in Fifth international conference on engineering failure analysis. 2012.
[27] Baran, E. and C. Topkaya, An experimental study on channel type shear connectors. Journal of Constructional Steel Research, 2012. 74: p. 108-117.
[28] ASTM, A., 370, “Standard Test Methods and Definitions for Mechanical Testing of Steel Products”. Anual Book of Standard, 2005.
[29] Sajedi, F. and H.A. Razak, The effect of chemical activators on early strength of ordinary Portland cement-slag mortars. Construction and Building Materials, 2010. 24(10): p. 1944-1951.
[30] Neville, A., Properties of concrete. Malaysia: Prentice Hall. 2008.
[31] Razak, H.A. and F. Sajedi, The effect of heat treatment on the compressive strength of cement-slag mortars. Materials & Design, 2011. 32(8-9): p. 4618-4628.
[32] ASTM, C., Standard test method for compressive strength of cylindrical concrete specimens. 2012.
[33] Neville, A. and J. Brooks, Concrete technology. Malaysia: Prentice Hall. 2008.
[34] Sajedi, F., Mechanical activation of cement-slag mortars. Construction and Building Materials, 2011. doi:10.1016/j.conbuildmat.2011.05.001.
[35] ASTM, C., 39 (2004)“Standard test method for compressive strength of cylindrical concrete specimens.”. Annual Book of ASTM Standards, 2005.
[36] Haremza, C., A. Santiago, and L.S. da Silva, Experimental behaviour of heated composite steel–concrete joints subject to variable bending moments and axial forces. Engineering Structures, 2013. 51: p. 150-165.
[37] Maleki, S. and S. Bagheri, Behavior of channel shear connectors, Part II: Analytical study. Journal of Constructional Steel Research, 2008. 64 p. 1341-1348.
[38] Maleki, S. and S. Bagheri, Behavior of channel shear connectors, Part I: Experimental study. Journal of Constructional Steel Research, 2008. 64 p. 1333-1340.
[39] Tests, I., Elements of Building Construction, ISO-834. International Organization for Standardization. Geneva, 1975.
[40] Harmathy, T., Thermal properties of concrete at elevated temperatures. Journal of Materials, 1970.
[41] Bazant, Z.P. and M.F. Kaplan, Concrete at high temperature. Material Properties and Mathematical ModelsLongman Group Limited, Essex, England, 1996.
[42] CSN, E., 1-2: Eurocode 2: Design of Concrete Structures-Part 1-2: General Rules–Structural Fire Design. 2006, CNI, Praha.
[43] Eurocode, E., 4: Design of composite steel and concrete structures–Part 1-2: General rules–Structural fire design. British Standards Institution, BS EN, 1994: p. 1-2.