EVALUATION OF REINFORCING BARS RATIO EFFECTS ON SCC BEAM-COLUMN JOINT PERFORMANCE

Year 2019, Volume: 24 Issue: 3, 141 - 152, 31.12.2019

Hamid Farrokh Ghatte

https://doi.org/10.17482/uumfd.587505

Cited By: 4

Abstract

Beam-column joints require a high ductility during the unexpected loadings that necessitate the
need for ductile concrete in such unprotected locations. Alternatively, self-compacting concrete (SCC) is
a sort of concrete which has generated tremendous interest throughout the last decades in order to reach a
ductile structural elements during the seismic actions. Specific properties of this type of concrete include
high performance, high resistance against segregation and needless to internal or external vibration in
order to compact. In the seismic regions, ductility is one of the most important factors in the design of
reinforced concrete (RC) members, especially structural joints flexural performance; it is due to the
enhance in the capability of plastic deformability. This paper describes load-displacement behavior of
experimental and theoretical analysis of four SCC beam-column joints with different percentage of the
ratio of the reinforcing bars (ρ). In the theoretical phase of this investigation three-dimensional nonlinear
finite element method (FEM) model i.e., Seismostruct was used and the load-deflection diagrams were
plotted to compare the test results with the numerical output. The experimental results and nonlinear FEM
modeling indicate that using SCC as a workable concrete in beam-column joints of reinforced concrete
structures has satisfactory performance in terms of ductility and energy dissipations.

Keywords

Beam-column joint, Ductility, FEM, Load-deflection, Self-compacting concrete

Kendiliğinden Yerleşen Betonla Yapılan Kolon-Kiriş Birleşimlerinde Donatı Oranı Etkisinin Değerlendirilmesi

Abstract

Yüksek süneklik gerektiren kolon-kiriş düğüm noktaları gibi korunmasız bölgelerde, beklenmedik
yüklemeler altında, sünek betona ihtiyaç duyulmaktadır. Alternatif olarak, kendiliğinden yerleşen beton
(KYB), deprem etkisi altinda elemanların daha sünek davranış gösteren bir yapıya ulaşmak için son
yıllarda büyük ilgi yaratan bir beton türüdür. Bu tipteki betonların belirgin özellikleri yüksek performans,
segregasyona karşı yüksek direnç ve yerleşme için iç veya dış vibrasyona ihtiyaç duyulmamasıdır.
Deprem bölgelerinde, süneklik, özellikle eğilmeye maruz kalan yapısal bağlantı noktalarının
performansında önemli bir faktördür ve bu davranış plastik yerdeğiştirme kapasitesindeki artıştan
kaynaklanmaktadır. Bu makalede, KYB kullanılan ve farklı donatı oranlarındaki dört adet kolon-kiriş
düğüm noktasının yük-yerdeğiştirme davranışının deneysel ve teorik analizleri açıklanmaktadır. Bu
araştırmanın teorik aşamasında, üç boyutlu sonlu elemanlar metodu (SEM), Seismostruct doğrusal
olmayan yazılımı kullanılarak, deneysel-nümerik sonuçlar karşılaştırılmış ve yük-yerdeğiştirme
diyagramları çizdirilmiştir. Deneysel sonuçlar ve doğrusal olmayan SEM modeli, kolon-kiriş düğüm
noktalarında işlenebilir beton olarak KYB’un kullanımının, betonarme yapılarda süneklik ve enerji yutma
kapasitesi bakımından tatmin edici bir performansa sahip olduğunu göstermiştir.

Keywords

Kolon- Kiriş düğüm noktası, SEM, Yük-yerdeğiştirme, Kendiliğinden yerleşen beton, İşlenebilir beton

References

• Ashtiani, M. S., Dhakal, R. P., & Scott, A. N. (2013). Post-yield bond behaviour of deformed bars in high-strength self-compacting concrete. Construction and Building Materials, 44, 236-248. doi: 10.1016/j.conbuildmat.2013.02.072
• Ashtiani, M. S., Dhakal, R. P., & Scott, A. N. (2014). Seismic performance of high-strength self-compacting concrete in reinforced concrete beam-column joints. Journal of Structural Engineering, 140(5), 04014002. doi: 10.1061/(asce)st.1943-541x.0000973
• Bedirhanoglu, I., Ilki, A., Pujol, S., & Kumbasar, N. (2010). Seismic behavior of joints built with plain bars and low-strength concrete. ACI Struct. J, 107(3), 300-310. doi: 10.1061/(asce)cc.1943-5614.0000156
• Dashti, F., Dhakal, R. P., & Pampanin, S. (2017). Numerical modeling of rectangular reinforced concrete structural walls. Journal of Structural Engineering, 143(6), 04017031. doi: 10.1061/(ASCE)ST.1943-541X.0001729
• De Almeida Filho, F. M., Mounir, K., & El Debs, A. L. H. (2008). Bond-slip behavior of self-compacting concrete and vibrated concrete using pull-out and beam tests. Materials and Structures, 41(6), 1073-1089. doi: 10.1617/s11527-007-9307-0
• Desnerck, P., De Schutter, G., & Taerwe, L. (2010). Bond behaviour of reinforcing bars in self-compacting concrete: experimental determination by using beam tests. Materials and Structures, 43(1), 53-62. doi: 10.1617/s11527-010-9596-6
• Dhakal, R., & Scott, A. C. N. (2018). Cyclic response analysis of high-strength selfcompacting concrete beam-column joints: Numerical modeling and experimental validation. Bulletin of the New Zealand Society for Earthquake Engineering volume 51 issue 1 on pages 23 to 33. doi: 10.5459/bnzsee.51.1.23-33
• Ghatte, H.F, Comert, M., Demir, C., Akbaba, M., & Ilki, A. (2018). Seismic Retrofit of Full-Scale Substandard Extended Rectangular RC Columns through CFRP Jacketing: Test Results and Design Recommendations. Journal of Composites for Construction, 23(1), 04018071. doi: 10.1061/(ASCE)CC.1943-5614.0000907
• Hassan, A. A. A., Hossain, K. M. A., & Lachemi, M. (2008). Behavior of full-scale selfconsolidating concrete beams in shear. Cement and Concrete Composites, 30(7), 588-596. doi: 10.1016/j.cemconcomp.2008.03.005
• Kim, Y. H., Hueste, M. B. D., Trejo, D., & Cline, D. B. (2010). Shear characteristics and design for high-strength self-consolidating concrete. Journal of structural engineering, 136(8), 989-1000. doi: 10.1061/(ASCE)ST.1943-541X.0000194
• Lachemi, M., Hossain, K. M., & Lambros, V. (2005). Shear resistance of self-consolidating concrete beams experimental investigations. Canadian journal of civil engineering, 32(6), 1103-1113. doi: 10.1139/l05-066
• Li B, Tran CTN and Pan TC (2009). Experimental and numerical investigations on the seismic behavior of lightly reinforced concrete beam-column joints. ASCE Journal of Structural Engineering, 135(9): 1007-1018. doi: 10.1061/(ASCE)ST.1943-541X.0000040
• Mander, J. B., Priestley, M. J., & Park, R. (1988). Theoretical stress-strain model for confined concrete. Journal of structural engineering, 114(8), 1804-1826. doi: 10.1061/(ASCE)0733-9445(1988)114:8(1804)
• Menegotto, M., & Pinto, P. (1973). Method of Analysis for Cyclically Loaded Reinforced Concrete Plane Frames Including Changes in Geometry and Non-elastic Behavior of Elements under Combined Normal Force and Bending. Proceedings. IABSE Symposium on Resistance and Ultimate Deformability of Structures Acted on by Well-Defined Repeated Loads, International Association of Bridge and Structural Engineering, 13, pp. 15-22. Lisbon, Portugal.
• Persson, B. (2001). A comparison between mechanical properties of self-compacting concrete and the corresponding properties of normal concrete. Cement and concrete Research, 31(2), 193-198. doi: 10.1016/S0008-8846(00)00497-X
• SeismoStruct v6.5. (2013). A computer program for static and dynamic nonlinear analyses of framed structures. Available from http://www.seismosoft.com
• Sonebi, M., Tamimi, A. K., & Bartos, P. J. (2003). Performance and cracking behavior of reinforced beams cast with self-consolidating concrete. Materials Journal, 100(6), 492-500. doi: 10.14359/12956
• Tsonos, A. G., Tegos, I. A., & Penelis, G. G. (1993). Seismic resistance of type 2 exterior beam-column joints reinforced with inclined bars. Structural Journal, 89(1), 3-12. doi: 10.14359/1278
• Valcuende, M., & Parra, C. (2009). Bond behaviour of reinforcement in self-compacting concretes. Construction and Building Materials, 23(1), 162-170. doi: 10.1016/j.conbuildmat.2008.01.007