Browse > Article
http://dx.doi.org/10.12989/sem.2016.57.5.785

Experimental study on innovative tubular web RBS connections in steel MRFs with typical shallow beams  

Saleh, Aboozar (School of Civil Engineering, the University of Tehran)
Zahrai, Seyed M. (School of Civil Engineering, the University of Tehran)
Mirghaderi, Seyed R. (School of Civil Engineering, the University of Tehran)
Publication Information
Structural Engineering and Mechanics / v.57, no.5, 2016 , pp. 785-808 More about this Journal
Abstract
An innovative Reduced Beam Section (RBS) connection, called Tubular Web RBS connection (TW-RBS), has been recently introduced and its performance has been numerically investigated in some earlier studies. The TW-RBS connection is a kind of accordion-web RBS connection in which part of the flat web of the beam is replaced by a steel tube at the expected region of the plastic hinge. This paper presents experimental results of three TW-RBS connections under cyclic loading. Obtained results indicated that TW-RBS reduces 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. Based on the experimental results, the tubular web in the plastic hinge region improves lateral-torsional buckling stability of the beam such that only local buckling of the beam flange at the center of the reduced section was observed during the tests. In order to achieve a better understanding, behavior of all TW-RBS specimens are also numerically investigated and compared with those of experimental results.
Keywords
cyclic testing; special moment frame; reduced beam section; tubular web RBS (TW-RBS); test specimens; shallow beams;
Citations & Related Records
연도 인용수 순위
  • Reference
1 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.   DOI
2 Ricles, J.M., Mao, C., Lu, L.W. and Fisher, J.W. (2003), "Ductile details for welded unreinforced moment connections subject to inelastic cyclic loading", Eng. Struct., 25(5), 667-680.   DOI
3 Saleh, A., Mirghaderi, S.R. and Zahrai, S.M. (2016a), "Cyclic testing of tubular web RBS connections in deep beams", J. Constr. Steel Res., 117, 214-226.   DOI
4 Saleh, A., Zahrai, S.M. and Mirghaderi, S.R. (2016b), "Cyclic testing of tubular web RBS connections with two accordion cells in deep beams", Eng. Struct. (in Press)
5 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.   DOI
6 Wilkinson, S., Hurdman, G. and Crouther, A. (2006), "A moment resisting connection for earthquake resisting structure", J. Constr. Steel Res., 62, 295-302.   DOI
7 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.   DOI
8 American Institute of Steel Construction (2010), Seismic Provisions for Structural Steel Buildings, AISC, Chicago.
9 Engelhardt, M., Winneberger, T., Zekany, A. and Potyraj, T. (1998), "Experimental investigation of Dogbone moment connections", Eng. J. AISC, Fourth Quarter, 128-139.
10 Federal Emergency Management Agency (2000), FEMA-350, Seismic design criteria for new moment resisting steel frame construction, Washington DC.
11 Federal Emergency Management Agency (2000), FEMA-355D, State of the art report on connection performance, Washington DC.
12 Han, S.W. and Moon, H.H. (2009), "Design equations for moment strength of RBS-B connection", J. Constr. Steel Res., 65, 1087-1095.   DOI
13 Mirghaderi, S.R., Torabian, S. and Imanpour, A. (2010), "Seismic performance of the Accordion-Web RBS connection", J. Constr. Steel Res., 66, 277-288.   DOI
14 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.   DOI
15 Naeim, F. (2001), The seismic design handbook, 2nd Edition, Kluwer Academic Publishers.