Investigate the Influence of Different UHPC Laminates Thickness to the Flexural Capacity

Abstract

The aim of this study is to investigate behavior of reinforced concrete beams with insufficient flexural strength which are reinforced by ultra high performance concrete (UHPC) were examined experimentally. UYPC with 3% fiber volume was used for manufacturing laminates which will be used for reinforcing. UHPC having three different thickness (30 mm, 50 mm and 70 mm) where one of them will be control sample was used for observing effect of change in thickness over flexural behavior were manufactured and applied over reinforced concrete beams. RC Beams were tested under four -point bending loads. Increase in load carrying capacity varying with 20%-58% rates were obtained in samples which were reinforced with UHPC.

Keywords

• Ultra high performance concrete,reinforced concrete beam,flexural behavior in reinforced beam

Project Number

114M2257

Farklı Kalınlıkta UYPB Laminelerin Eğilme Kapasitesine Katkısının İncelenmesi

Abstract

Çalışmada, ultra yüksek performanslı beton (UYPB) plakalarla güçlendirilmiş eğilme dayanımı yetersiz betonarme kirişlerin davranışı deneysel olarak incelenmiştir. Güçlendirme amacıyla kullanılacak plakaların imalatı için %3 fiber hacmine sahip UYPB kullanılmıştır. Bir tanesi kontrol numunesi olmak üzere, kalınlık değişiminin eğilme davranışı üzerindeki etkilerini gözlemlemek amacıyla 3 farklı kalınlıkta UYPB plaka üretilmiş (30 mm, 50 mm ve 70 mm) ve plakalar betonarme kirişlere uygulanmıştır. Kirişler, dört noktalı eğilme yükleri altında test edilmiştir. UYPB plaka ile güçlendirilmiş numunelerde yük taşıma kapasitesinde %20 ila %58 arasında değişen oranlarda artış elde edilmiştir. 

Keywords

• Ultra Yüksek Performanslı Beton,Betonarme Kiriş,Güçlendirilmiş Kirişte Eğilme Davranışı

Supporting Institution

Türkiye Bilimsel ve Teknolojik Araştıırma Kurumu’na (TÜBİTAK)

Project Number

114M2257

Thanks

114M2257 numaralı araştırma projesi ile çalışmaya destek olan Türkiye Bilimsel ve Teknolojik Araştıırma Kurumu’na (TÜBİTAK) ve betonarme elemanların üretilmesi sürecinde sundukları destekler için Yeni Prefabrike Beton İnşaat San. Ve Tic. A.Ş.’ye teşekkür ederiz.

References

1. Tanarslan H.M., Alver N., Jahangiri R., Yalçınkaya Ç., Yazıcı H. 2017. Flexural strengthening of RC beams using UHPFRC laminates: Bonding techniques and rebar addition. Construction and Building Materials DOI:155 (2017) 45–55
2. Tanarslan H.M. 2017, Flexural strengthening of RC beams with prefabricated ultra high performance fibre reinforced concrete laminates, Engineering Structures DOI:151 (2017) 337–348
3. Oehlers D.J., Reinforced concrete beams with plates glued to their soffits, J.Struct. Eng. 118 (1992) 2023–2038, http://dx.doi.org/10.1061/(ASCE)0733-9445(1992) 118:8(2023).
4. Souza R.H.F., Appleton J., Flexural behaviour of strengthened reinforced concrete beams, Mater. Struct. 30 (1997) 154–159, http://dx.doi.org/10.1007/BF02486387.
5. Yurdakul Ö., Avsar Ö., Strengthening of substandard reinforced concrete beamcolumn joints by external post-tension rods, Eng. Struct. 107 (2016) 9–22, http://dx.doi.org/10.1016/j.engstruct.2015.11.004.
6. Altun F., An experimental study of the jacketed reinforced-concrete beams under bending, Constr. Build. Mater. 18 (2004) 611–618, http://dx.doi.org/10.1016/j.conbuildmat.2004.04.005.
7. Alhadid M.M.A., Youssef M.A., Analysis of reinforced concrete beams strengthened using concrete jackets, Eng. Struct. 132 (2017) 172–187, http://dx.doi.org/10.1016/j.engstruct.2016.11.014.
8. Tetta Z.C., Koutas L.N., Bournas D.A., Textile-reinforced mortar (TRM) versus fiber-reinforced polymers (FRP) in shear strengthening of concrete beams, Compos. Part B Eng. 77 (2015) 338–348, http://dx.doi.org/10.1016/j.compositesb.2015.03.055.

9. Spadea G., Bencardino F., Swamy R.N., Structural behavior of composite rc beams with externally bonded CFRP, J. Compos. Constr. 2 (1998) 132–137, http://dx.doi.org/10.1061/(ASCE)1090-0268(1998) 2:3(132).
10. Lamanna A.J., Bank L.C., Scott D.W., Flexural strengthening of reinforced concrete beams by mechanically attaching fiber-reinforced polymer strips, J. Compos. Constr. 8 (2004) 203–210, http://dx.doi.org/10.1061/(ASCE)1090-0268(2004) 8:3(203).
11. Al-Saidy A.H., Saadatmanesh H., El-Gamal S., Al-Jabri K.S., Waris B.M., Structural behavior of corroded RC beams with/without stirrups repaired with CFRP sheets, Mater. Struct. 49 (2016) 3733–3747, http://dx.doi.org/10.1617/s11527-015-0751-y.
12. Brühwiler, E. Rehabilitation and strengthening of concrete structures using Ultra-High Performance Fibre Reinforced Concrete, Concrete Repair, Rehabilitation and Retrofi tting III – Alexander et al. (eds), 2008.
13. Kang S.-T., Ryu G.-S., The effect of steel-fiber contents on the compressive stress-strain relation of ultra high performance cementitious composites (UHPCC), J. Korea Concr. Inst. 23 (2011) 67–75, http://dx.doi.org/10.4334/JKCI.2011.23.1.067.
14. Ghafari E., Costa H., Júlio E., RSM-based model to predict the performance of selfcompactingUHPC reinforced with hybrid steel micro-fibers, Constr. Build.Mater. 66 (2014) 375–383, http://dx.doi.org/10.1016/j.conbuildmat.2014.05.064.
15. Ghafari E., Arezoumandi M., Costa H., Júlio E., Influence of nano-silica addition in the durability of UHPC, Constr. Build. Mater. 94 (2015) 181–188, http://dx.doi.org/10.1016/j.conbuildmat.2015.07.009.
16. Ghafari E., Costa H., Júlio E., Portugal A., Durães L., The effect of nanosilica addition on flowability, strength and transport properties of ultra high performance concrete, Mater. Des. 59 (2014) 1–9, http://dx.doi.org/10.1016/j.matdes.2014.02.051.
17. Yalçınkaya Ç., Yazıcı H., Effects of ambient temperature and relative humidity on early-age shrinkage of UHPC with high-volume mineral admixtures, Constr. Build. Mater. 144 (2017) 252–259, http://dx.doi.org/10.1016/j.conbuildmat.2017.03.198.
18. Mahmud G.H., Yang Z., Hassan A.M.T., Experimental and numerical studies of size effects of ultra high performance steel fibre reinforced concrete (UHPFRC) beams, Constr. Build. Mater. 48 (2013) 1027–1034, http://dx.doi.org/10.1016/j.conbuildmat.2013.07.061.
19. Hassan A.M.T., Mahmud G.H., Jones S.W., Whitford C., A new test method for investigating punching shear strength in ultra high performance fibre reinforced concrete (UHPFRC) slabs, Compos. Struct. 131 (2015) 832–841, http://dx.doi.org/10.1016/j.compstruct.2015.06.044.
20. Singh M., Sheikh A.H., Mohamed Ali M.S., Visintin P., Griffith M.C., Experimental and numerical study of the flexural behaviour of ultra-high performance fibre reinforced concrete beams, Constr. Build. Mater. 138 (2017) 12–25, http://dx.doi.org/10.1016/j.conbuildmat.2017.02.002.
21. Prem P.R., Murthy A.R., Acoustic emission and flexural behaviour of RC beams strengthened with UHPC overlay, Constr. Build. Mater. 123 (2016) 481–492, http://dx.doi.org/10.1016/j.conbuildmat.2016.07.033.
22. M.A. Al-Osta, M.N. Isa, M.H. Baluch, M.K. Rahman, Flexural behavior of reinforced concrete beams strengthened with ultra-high performance fiber reinforced concrete, Constr. Build. Mater. 134 (2017) 279–296, http://dx.doi.org/10.1016/j.conbuildmat.2016.12.094.
23. Mohammed T.J., Abu Bakar B.H., Bunnori N.M., Strengthening of reinforced concrete beams subjected to torsion with UHPFC composites, Struct. Eng. Mech. 56 (2015), http://dx.doi.org/10.12989/sem.2015.56.1.123.
24. Meda A., Mostosi S., Rinaldi Z., Riva P., Corroded RC columns repair and strengthening with high performance fiber reinforced concrete jacket, Mater. Struct. 49 (2016) 1967–1978, http://dx.doi.org/10.1617/s11527-015-0627-1.
25. Abdullah M.A.H., Mohd Zahid M.Z.A., Abu Bakar B.H., Nazri F.M., Ayob A., UHPFRC as repair material for fire-damaged reinforced concrete structure – a review, Appl. Mech. Mater. 802 (2015) 283–289, http://dx.doi.org/10.4028/ www.scientific.net/AMM.802.283.
26. Yalçınkaya Ç., Yazıcı H., Effect of early-age freeze-thaw exposure on the mechanical performance of self-compacting repair mortars, Sci. Eng. Compos.Mater. 23 (2016) 335–344, http://dx.doi.org/10.1515/secm-2014-0006.
27. Beglarigale A., Yalçınkaya Ç., Yigiter H., Yazıcı H., Flexural performance of SIFCON composites subjected to high temperature, Constr. Build. Mater. 104 (2016)99–108, http://dx.doi.org/10.1016/j.conbuildmat.2015.12.034.
28. Park R. 1988. Ductility evaluation from laboratory and analytical testing. Proceedings of the 9th World Conference on Earthquake Engineering, Tokyo, Kyoto, 8, 605-616.
29. Türker, K., Birol, T., Yavas, A. ve Hasgül, U., Ultra Yüksek Performanslı Lifli Beton İçeren Kirislerde Etkin Çelik Lif Tipi İncelemesi, Afyon Kocatepe Üniversitesi Fen ve Mühendislik Bilimleri Dergisi, 16, 776-785, (2016).
30. Türker, K., Birol, T., Yavas, A., Hasgül, U. ve Yazıcı H., Ultra Yüksek Performanslı Lifli Beton ile Üretilmiş Betonarme Kirislerin Eğilme Davranışı, Teknik Dergi, 2019 8777-8801, Yazı 523, DOI:10.18400/tekderg.287116.
31. Taşdemir, M. A. ve Bayramov, F. Yerlikaya M., Geleneksel ve Yüksek Performanslı Çelik Donatılı Betonlar, TMH – Türkiye Mühendislik Haberleri Sayı:426 - 2003/4