Rayan FAİZ, Mohammed Shakib AL JAWAHERY, Mehmet Tolga GÖĞÜŞ

Fiber takviyeli beton döşemenin doğrusal olmayan zımbalama davranışı üzerine parametrik bir çalışma

Bu makale, döşemelerin zımbalama kesmesi davranışı üzerinde lifin etkisini araştırmaktadır; vaka çalışmasını simüle etmek için bir sonlu eleman modelleme yaklaşımı kullanılmıştır. Yüzde 0.2 makro sentetik lifler ve yüzde 0.68. 0.8 ve 0.96 çelik lifler, 50 MPa basınç dayanımları, kullanılan farklı boyuna donatılar ve 150, 200 ve 250 mm levha kalınlıkları içeren hibrid lif takviyeli betonun orantı karışımı hepsi bu çalışmada birleştirilmiş ve incelenmiştir. ATENA yazılım doğrusal olmayan sonlu eleman analizi yapmak için kullanılmıştır. Döşeme sonuçlarının doğrulanması, önceki deneysel çalışmalara benzer şekilde yapıldı ve elde edilen sonuçlar, büyük bir yakınlığın bulunduğunu gösterdi. Bu araştırmada, 1900 × 1900 mm boyutlarında otuz altı adet çift yönlü döşeme numunesi modellenmiştir. Döşemelerin dört tarafı da basit mesnetlidir. Sonuçlar, hibrit çelik elyaf ile döşemelerin nihai kesme kapasitesinin arttığını göstermiştir. Bununla birlikte, takviye oranındaki ve plaka kalınlığındaki artış nedeniyle plakaların nihai kapasitesi azalmıştır.

Anahtar Kelimeler:

Döşemeler, HFRC döşemeler, Sonlu Elemanlar Metodu, Doğrusal olmayan analiz

Parametric study of nonlinear finite element punching behavior of fiber-reinforced concrete slab

This paper investigates the effect of fiber on the behavior of punching shear slabs; a finite element modeling approach is used to simulate the case study. The proportion mix of hybrid fiber-reinforced concrete, which contains 0.2 percent macro synthetic fibers and 0.68, 0.8, and 0.96 percent steel fibers, compressive strengths of 50 MPa, different longitudinal reinforcement used, and slab thicknesses of 150, 200, and 250 mm are all joined and investigated in this study. The ATENA software is used to perform nonlinear finite element analysis. The slab results validation was done similarly to previous experimental work, and the acquired results indicated a significant agreement. Thirty-six two-way specimen slabs with dimensions of 1900 × 1900mm were modeled in this investigation. All four sides of the slabs are supported. The results showed that the slabs' ultimate shear capacity increases with increasing the hybrid steel fiber. Nevertheless, the ultimate capacity of the slabs has decreased due to an increase in the reinforcement ratio and slab thickness.

Keywords:

Slabs, HFRC slabs, Finite element method, Nonlinear analysis,

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S.A. Al-Taan and A.A. Abdul-Razzak, Geometrical and material nonlinear finite analysis of fiber reinforced concrete slabs. IOP Conference Series: Materials Science and Engineering, 2020. https://dx.doi.org/10.1088/1757-899X/978/1/012041
Mabrouk, R.T. and A.A. Hegab. Analysis of the punching behavior of RC flat slabs with horizontal and vertical shear reinforcement. MATEC Web Conf. 120 010062017.https://doi.org/10.1051/matecconf/201712001006
J.A.O. Barros, B.N.M. Neto, G.S.S.A. Melo, C.M.V. Frazão, Assessment of the effectiveness of steel fibre reinforcement for the punching resistance of flat slabs by experimental research and design approach. Composites Part B: Engineering, 78, 8-25, 2015. https://doi.org/10.1016/j.compositesb.2015.03.050
A.H Aziz and S.S. Kareem, Development, Experimental study for punching shear behavior in RC flat plate with hybrid high strength concrete. Journal of Engineering and Sustainable Development, 17(3), 105-119, 2013.
R. Koppitz, A. Kenel and T. Keller, Punching shear of RC flat slabs–review of analytical models for new and strengthening of existing slabs, Engineering Structures, 52, 123-130, 2013. https://doi.org/10.1016/ j.engstruct.2013.02.014
M.S. Bharath and M.L. Pothula, Experimental study on punching shear strength of fiber reinforced hvfa concrete slabs. International Journal of Scientific Engineering and Technology Research, 05(36), 7579-7586, 2016.
W.A. Labib, Evaluation of hybrid fibre-reinforced concrete slabs in terms of punching shear. Construction and Building Materials, 260, 119763, 2020. https://doi.org/10.1016/j.conbuildmat.2020.119763
T.H. Almusallam, A.A. Abadel, Y.A. A.N. A. Siddiqui and H. Abbas, Effectiveness of hybrid-fibers in improving the impact resistance of RC slabs. International Journal of Impact Engineering, 81, 61-73, 2015. https://doi.org/10.1016/j.ijimpeng.2015.03.010
K. Kobayashi and R. Cho, Flexural characteristics of steel fibre and polyethylene fibre hybrid-reinforced concrete. Composites, 13(2), 164-168, 1982. https://doi.org/10.1016/0010-4361(82)90054-4
F. Sermet and A. Ozdemir, Investigation of punching behaviour of steel and polypropylene fibre reinforced concrete slabs under normal load. Procedia Engineering, 161, 458-465, 2016. https://doi.org/10.1016/j.proeng.2016.08.590
S. P. Shah, J.I. Daniel, S. H. Ahmad, M. Arockiasamy, P. N. Balaguru, C. G. Ball and R.F. Zollo, Guide for specifying, proportioning, mixing, placing, and finishing steel fiber reinforced concrete. ACI Materials Journal, 90(1), 94-101, 1993.
P. Pujadas, A. Blanco, S.H.P. Cavalaro, A. Fuente and A. Aguado, Flat suspended slabs reinforced only with macro-synthetic fibres. In Proceedings of the 9th RILEM International Symposium on Fiber Reinforced Concrete (BEFIB 2016), Vancouver, BC, Canada, 19–21 September 2016.
ACI 544.1R-96, report on fiber reinforced concrete. American Concrete Institute, Farmington Hills, Michigan, USA, 1996.
S. Kinnunen and H. Nylander, Punching of concrete slabs without shear reinforcement. Elander Boktryckeri Aktiebolag, Sweden, 1960.
ZP Bažant and Z Cao, Size effect in punching shear failure of slabs. ACI Structural Journal, 84(1), 44-53, 1987.
A Caratelli, S Imperatore, A Meda, Z Rinaldi, Punching shear behavior of lightweight fiber reinforced concrete slabs. Composites Part B: Engineering, 99, 257-265, 2016.https://doi.org/10.1016/j.compositesb.2016.06.045
R. Pourreza, Investigating the effects of hybrid fibres on the structural behaviour of two-way slabs. PhD Thesis. Memorial University of Newfoundland, 2014.
M. AlHamaydeh and M.A. Orabi, Punching shear behavior of synthetic fiber–reinforced self-consolidating concrete flat slabs with GFRP bars. Journal of Composites for Construction, 25(4), 04021029, 2021. https://doi.org/10.1061/ (ASCE)CC.19435614.0001131
E.K. Sayhood, S.P. Yaakoub and H.F. Hussien, Nonlinear finite element analysis for punching shear resistance of steel fibers high strength reinforced concrete slabs. Jour. of Engineering and Technology, 32(6), 1411-1432, 2014.
M. Navarro, S. Ivorra and F.B. Varona, Parametric finite element analysis of punching shear behaviour of RC slabs reinforced with bolts. Computers & Structures, 228, 106147, 2020. https://doi.org/10.1016/j.compstruc.2019.106147
V. Cervenka, J. Cervenka, Z. Janda, D. Pryl, ATENA Program Documentation, Part 8: User’s Manual For Atena-Gid Interface; Cervenka Consulting, Prague, Czech Republic, 2017.
M.S. Al Jawahery, M.E. Gulsan, H.M. Albegmprli, I.A.H. Mansoori and A. Cevik Experimental investigation of rehabilitated RC haunched beams via CFRP with 3D-FE modeling analysis. Engineering Structures, 196, 109301, 2019. https://doi.org/10.1016/j.engstruct.2019.109301
V. Cervenka, L. Jedele and J. Cervenka, ATENA Program Documentation. Theory And User Manual, Cervenka Consulting, Czech Republic, Prague, 2018.
M.S. Al Jawahery, A. Cevik and M.E. Gulsan, 3D FE modeling and parametric analysis of steel fiber reinforced concrete haunched beams. Advances in Concrete Construction. 13(1), 45-69, 2022. https://doi.org/10.12989/acc.2022.13.1.045