Browse > Article
http://dx.doi.org/10.12989/sem.2014.49.6.775

Column-loss response of RC beam-column sub-assemblages with different bar-cutoff patterns  

Tsai, Meng-Hao (Department of Civil Engineering, National Pingtung University of Science and Technology)
Lua, Jun-Kai (Department of Civil Engineering, National Pingtung University of Science and Technology)
Huang, Bo-Hong (Department of Civil Engineering, National Pingtung University of Science and Technology)
Publication Information
Structural Engineering and Mechanics / v.49, no.6, 2014 , pp. 775-792 More about this Journal
Abstract
Static loading tests were carried out in this study to investigate the effect of bar cutoff on the resistance of RC beam-column sub-assemblages under column loss. Two specimens were designed with continuous main reinforcement. Four others were designed with different types of bar cutoff in the mid-span and/or the beam-end regions. Compressive arch and tensile catenary responses of the specimens under gravitational loading were compared. Test results indicated that those specimens with approximately equal moment strength at the beam ends had similar peak loading resistance in the compressive arch phase but varied resistance degradation in the transition phase because of bar cutoff. The compressive bars terminated at one-third span could help to mitigate the degradation although they had minor contribution to the catenary action. Among those cutoff patterns, the K-type cutoff presented the best strength enhancement. It revealed that it is better to extend the steel bars beyond the mid-span before cutoff for the two-span beams bridging over a column vulnerable to sudden failure. For general cutoff patterns dominated by gravitational and seismic designs, they may be appropriately modified to minimize the influence of bar cutoff on the progressive collapse resistance.
Keywords
static loading test; column loss; bar cutoff; RC sub-assemblage; arch action; catenary action;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 Choi, H. and Kim, J. (2011), "Progressive collapse-resisting capacity of RC beam-column sub-assemblage", Mag. Concrete Res., 63(4), 297-310.   DOI   ScienceOn
2 Abruzzo, J., Matta, A. and Panariello, G. (2006), "Study of mitigation strategies for progressive collapse of a reinforced concrete commercial building", J. Perform. Constr. Facil., 20(4), 384-390.   DOI   ScienceOn
3 ACI (2011), Building code requirements for structural concrete, Standard ACI 318-11, American Concrete Institute, Farmington Hills, Michigan, USA.
4 Almusallam, T.H., Elsanadedy, H.M., Abbas, H., Alsayed, S.H. and Al-Salloum, Y.A. (2010), "Progressive collapse analysis of an RC building subjected to blast loads", Struct. Eng. Mech., 36(3), 301-309.   DOI   ScienceOn
5 DoD (2009), Unified facilities criteria: design of buildings to resist progressive collapse, UFC 4-023-03, Department of Defense, Washington DC, USA.
6 Ellingwood, B.R. (2006), "Mitigating risk from abnormal loads and progressive collapse", J. Perform. Constr. Facil., 20(4), 315-323.   DOI   ScienceOn
7 GSA (2003), Progressive collapse analysis and design guidelines for new federal office buildings and major modernization projects, General Service Administration, Washington DC, USA.
8 Guice, L.K. and Phomberg, E.J. (1989), "An analogous model for slabs using a truss element", Comput. Struct., 31(5), 767-774.   DOI   ScienceOn
9 Kim, J. and An, D. (2009), "Evaluation of progressive collapse potential of steel moment frames considering catenary action", Struct. Des. Tall Spec. Build., 18(5), 455-465.   DOI   ScienceOn
10 Nair, R.S. (2006), "Preventing disproportionate collapse", J. Perform. Constr. Facil., 20(4), 309-314.   DOI   ScienceOn
11 Lee, C.H., Kim, S., Han, K.H. and Lee, K. (2009), "Simplified nonlinear progressive collapse analysis of welded steel moment frames", J. Constr. Steel Res., 65(5), 1130-1137.   DOI   ScienceOn
12 Liu, J.L. (2010), "Preventing progressive collapse through strengthening beam-to-column connection, Part 1: theoretical analysis", J. Constr. Steel Res., 66(2), 229-237.   DOI   ScienceOn
13 Sasani, M. and Sagiroglu, S. (2010), "Gravity load redistribution and progressive collapse resistance of 20- story reinforced concrete structure following loss of interior column", ACI Struct. J., 107(6), 636-644.
14 Mohamed, O.A. (2006), "Progressive collapse of structures: annotated bibliography and comparison of codes and standards", J. Perform. Constr. Facil., 20(4), 418-425.   DOI   ScienceOn
15 Sadek, F., Main, J.A., Lew, H.S. and Bao, Y. (2011), "Testing and analysis of steel and concrete beamcolumn assemblies under a column removal scenario", J. Struct. Eng., 137(9), 881-892.   DOI   ScienceOn
16 Sasani, M. and Kropelnicki, J. (2008), "Progressive collapse analysis of an RC structure", Struct. Des. Tall Spec. Build., 17(4), 757-771.   DOI   ScienceOn
17 Sasani, M., Werner, A. and Kazemi, A. (2011), "Bar fracture modeling in progressive collapse analysis of reinforced concrete structures", Eng. Struct., 33(2), 401-409.   DOI   ScienceOn
18 Tian, Y. and Su, Y. (2011), "Dynamic response of reinforced concrete beams following instantaneous removal of a bearing column", Int. J. Concrete Struct. Mater., 5(1), 19-28.   DOI   ScienceOn
19 Tsai, M.H. and Huang, T.C. (2013), "Progressive collapse analysis of an RC building with exterior partially infilled walls", Struct. Des. Tall Spec. Build., 22(4), 327-348.   DOI   ScienceOn
20 Yagob, O., Galal, K. and Naumoski, N. (2009), "Progressive collapse of reinforced concrete structures", Struct. Eng. Mech., 32(6), 771-786.   DOI   ScienceOn
21 Yi, W.J., He, Q.F., Xiao, Y. and Kunnath, S.K. (2008), "Experimental study on progressive collapse-resistant behavior of reinforced concrete frame structures", ACI Struct. J., 105(4), 433-439.
22 Izzuddin, B.A. (2005), "A simplified model for axially restrained beams subjected to extreme loading", Steel Struct., 5, 421-429.   DOI   ScienceOn
23 Yu, J. and Tan, K.H. (2013), "Experimental and numerical investigation on progressive collapse resistance of reinforced concrete beam column sub-assemblages", Eng. Struct., 55, 90-106.   DOI   ScienceOn
24 Su, Y., Tian, Y. and Song, X. (2009), "Progressive collapse resistance of axially-restrained frame beams", ACI Struct. J., 106(5), 600-607.