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Tubular Web Reduced Beam Section (TW-RBS) connection, a numerical and experimental study and result comparison

  • Zahrai, Seyed M. (School of Civil Engineering, College of Engineering, The University of Tehran) ;
  • Mirghaderi, Seyed R. (School of Civil Engineering, College of Engineering, The University of Tehran) ;
  • Saleh, Aboozar (Department of Civil Engineering, Islamic Azad University Professor Hesabi branch)
  • Received : 2015.05.29
  • Accepted : 2017.01.29
  • Published : 2017.04.10

Abstract

A kind of accordion-web RBS connection, "Tubular Web RBS (TW-RBS)" connection is proposed in this research. TW-RBS is made by replacing a part of web with a tube at the desirable location of the beam plastic hinge. This paper presents first a numerical study under cyclic load using ABAQUS finite element software. A test specimen is used for calibration and comparison of numerical results. Obtained results indicated that TW-RBS would reduce contribution of the beam web to the whole moment strength and creates a ductile fuse far from components of the beam-to-column connection. Besides, TW-RBS connection can increase story drift capacity up to 9% in the case of shallow beams which is much more than those stipulated by the current seismic codes. Furthermore, the tubular web like corrugated sheet can improve both the out-of-plane stiffness of the beam longitudinal axis and the flange stability condition due to the smaller width to thickness ratio of the beam flange in the plastic hinge region. Thus, the tubular web in the plastic hinge region improves lateral-torsional buckling stability of the beam as just local buckling of the beam flange at the center of the reduced section was observed during the tests. Also change of direction of strain in arc shape of the tubular web section is smaller than the accordion webs with sharp corners therefore the tubular web provides a better condition in terms of low-cycle fatigue than other accordion web with sharp corners.

Keywords

cyclic behavior;moment resisting steel frames;rigid connection;reduced beam section;Tubular Web RBS (TW-RBS)

References

  1. American Institute of Steel Construction (2010), AISC, Seismic Provisions for Structural Steel Buildings, Chicago, IL, USA.
  2. Chen, S.J. and Chao, Y.C. (2001), "Effect of composite action on seismic performance of steel moment connections with reduced beam sections", J. Constr. Steel Res., 57(4), 417-434. https://doi.org/10.1016/S0143-974X(00)00022-5
  3. Eldib, M.E. (2004), "Buckling analysis of beams with corrugated webs", Proceeding of 5th International Conference on Civil and Architecture Engineering (ICCAE Conference), Manila, Philippines, March.
  4. Eldib, M.E. (2009), "Shear buckling strength and design of curved corrugated steel webs for ridges", J. Constr. Steel Res., 65(12), 2129-2139. https://doi.org/10.1016/j.jcsr.2009.07.002
  5. Elgaaly, M., Hamlton, R. and Seshadri, A. (1997a), "Shear strength of beams with corrugated webs", J. Struct. Eng., 122(4), 390-398.
  6. Elgaaly, M., Seshadri, A. and Hamlton, R. (1997b), "Bending strength of steel beams with corrugated webs", J. Struct. Eng., 123(6), 772-782. https://doi.org/10.1061/(ASCE)0733-9445(1997)123:6(772)
  7. Engelhardt, M., Winneberger, T., Zekany, A. and Potyraj, T. (1998), "Experimental investigation of Dogbone moment connections", Eng J AISC, Fourth Quarter, 128-139.
  8. FEMA-350 (2000), Seismic design criteria for new moment resisting steel frame construction, Washington DC, USA.
  9. FEMA-351 (2000), Recommended seismic evaluation and upgrade criteria for exiting welded steel moment- frame buildings, Washington DC, USA.
  10. FEMA-352 (2000), Recommended posearthquake evaluation and repair criteria for welded steel moment- frame buildings, Washington DC, USA.
  11. FEMA-355D (2000), State of the art report on connection performance, Washington DC, USA.
  12. FEMA-355E (2000), State of the art report on past performance of steal moment-frame buildings in earthquake, Washington DC, USA.
  13. FEMA-355F (2000), State of the art report on performance prediction and evaluation of steal moment frame buildings, Washington DC, USA.
  14. Hamilton, RW. (1993), "Behavior of welded girder with corrugated webs", Ph.D. Dissertation; University of Maine, ME, USA.
  15. Han, S.W. and Moon, H.H. (2009), "Design equations for moment strength of RBS-B connection", J. Constr. Steel Res., 65(5), 1087-1095. https://doi.org/10.1016/j.jcsr.2009.01.003
  16. Jay-Shen, J.H., Astaneh-Asl, A. and McCallen, D. (2002), "Use of deep columns in special steel moment frames", Steel Tips, AISC.
  17. Jones, S.L., Fry, G.T. and Engelhardt, M.D. (2002), "Experimental evaluation of cyclically loaded reduced beam section moment connections", J. Struct. Eng., 128(4), 441-451. https://doi.org/10.1061/(ASCE)0733-9445(2002)128:4(441)
  18. Lee, C.H., Jeon, S.W., Kim, J.H. and Uang, C.M. (2005), "Effect of panel zone strength and beam web connection method on seismic performance of reduced beam section steel moment connection", J. Struct. Eng., 131(12), 1854-1865. https://doi.org/10.1061/(ASCE)0733-9445(2005)131:12(1854)
  19. Mirghaderi, S.R., Torabian, S. and Imanpour, A. (2010), "Seismic performance of the Accordion-Web RBS connection", J. Constr. Steel Res., 66(2), 277-288. https://doi.org/10.1016/j.jcsr.2009.09.007
  20. Morrison, M., Schweizer, D. and Hassan, T. (2015), "An innovative seismic performance enhancement technique for steel building moment resisting connections", J. Constr. Steel Res., 109, 34-46. https://doi.org/10.1016/j.jcsr.2015.02.010
  21. Moslehi Tabar, A. and Deylami, A. (2005), "Instability of beams with reduced beam section moment connections emphasizing the effect of column panel zone ductility", J. Constr. Steel Res., 61(11), 1475-1491. https://doi.org/10.1016/j.jcsr.2005.05.006
  22. Nakashima, M. and Kanao, I. (2002), "Lateral instability and lateral bracing of steel beams subjected to cyclic loading", J. Struct. Eng., 128(10), 1308-1316. https://doi.org/10.1061/(ASCE)0733-9445(2002)128:10(1308)
  23. Pachoumis, D.T., Galoussis, E.G., Kalfas, C.N. and Efthimiou, I.Z. (2010), "Cyclic performance of steel moment-resisting connections with reduced beam sections-experimental analysis and finite element model simulation", Eng. Struct., 32(9), 2683-2692. https://doi.org/10.1016/j.engstruct.2010.04.038
  24. Rao, D.P. and Kumar, S.S. (2006), "RHS beam-to-column connection with web opening-parametric study and design guidelines", J. Constr. Steel Res., 62(8), 747-756. https://doi.org/10.1016/j.jcsr.2005.11.015
  25. Ricles, J.M., Zhang, X., Lu, L.W. and Fisher, J.W. (2004), "Development of seismic guidelines for deep column steel moment connections", ATLSS Report No 04-13.
  26. Roeder, C.W. (2002), "Connection performance for seismic design of steel moment frames", J. Struct. Eng., 128(4), 517-525. https://doi.org/10.1061/(ASCE)0733-9445(2002)128:4(517)
  27. Tsavdaridis K.D. and D'Mello C. (2012), "Optimisation of novel elliptically-based web opening shapes of perforated steel beams", J. Constr. Steel Res., 76, 39-53. https://doi.org/10.1016/j.jcsr.2012.03.026
  28. Wilkinson, S., Hurdman, G. and Crouther, A. (2006), "A moment resisting connection for earthquake resisting structure", J. Constr. Steel Res., 62(3), 295-302. https://doi.org/10.1016/j.jcsr.2005.07.011
  29. Yang, Q. and Yang, N. (2009), "Seismic behaviors of steel moment resisting frames with opening in beam web", J. Constr. Steel Res., 65(6), 1323-1336. https://doi.org/10.1016/j.jcsr.2009.01.007
  30. Zhang, X. and Ricles, J.M. (2006a), "Experimental evaluation of reduced beam section connections to deep columns", J. Struct. Eng., 132(3), 346-357. https://doi.org/10.1061/(ASCE)0733-9445(2006)132:3(346)
  31. Zhang, X. and Ricles, J.M. (2006b), "Seismic behavior of reduced beam section moment connections to deep columns", J. Struct. Eng., 132(3), 358-367. https://doi.org/10.1061/(ASCE)0733-9445(2006)132:3(358)