Ultra Yüksek Performanslı Lifli Beton İçeren Kirişlerde Etkin Çelik Lif Tipi İncelemesi

Yıl 2016, Cilt: 16 Sayı: 3, 776 - 785, 31.12.2016

Kaan Türker , Tamer Birol Altuğ Yavaş Umut Hasgül

Öz

Çalışmada, ultra yüksek performanslı lifli beton içeren betonarme kirişlerde eğilme davranışı

bakımından etkin çelik lif tipinin deneysel olarak incelemesi yapılmıştır. Bunun için biri lifsiz, diğer dördü

farklı çelik lif tipi içeren beş adet 100x150x1500 mm boyutlarında kiriş üzerinde eğilme testleri

gerçekleştirilmiştir. Çalışmada 120 MPa üzeri basınç dayanımına sahip, hacimce %1.5 oranında çelik lif

içeren beton kullanılmıştır. Lif olarak düz mikro lif tipi (F6), iki adet tek kancalı makro lif tipi (F30 ve

F60_1) ve bir adet çift kancalı lif tipi (F60_2) incelenmiştir. Eğilmede etkin çelik lif tipi değerlendirmesi

yerdeğiştirme süneklikleri, yük taşıma kapasiteleri ve çatlak özelliklerine göre yapılmıştır. Çalışmada

elde edilen sonuçlardan; yük taşıma kapasitesi ve çatlakları sınırlandırma bakımından çift kancalı makro

lifin (F60_2), yerdeğiştirme sünekliği bakımından ise düz mikro lifin (F6) en etkin lif olduğu belirlenmiştir.

Anahtar Kelimeler

Ultra yüksek performanslı lifli beton, Çelik lif, Betonarme kiriş, Eğilme davranışı.

Kaynakça

• AFGC, 2013. Recommendation: Ultra high performance fibre-reinforced concretes, revised ed. Association Française de Génie Civil; Service d’études techniques des routes et autoroutes.
• ASTM C494 / C494M-15a, 2015. Standard Specification for Chemical Admixtures for Concrete, ASTM International, West Conshohocken, PA.
• Bache H.H. Densified cement/ultrafine particle-based materials. in "2nd int. conference on superplasticizers in concrete”, Ottawa, 10–12 June 1981.Wille K., Naaman A.E. ve Parra-Montesinos G.J., 2011. Ultra-high performance Concrete with compressive strength exceeding 150 MPa (22 ksi): a simpler way. ACI Materials Journal, 108(1), 46–54.
• Bertram G. and Hegger J., 2008. Shear carrying capacity of Ultra-High Performance Concrete beams. Proceedings, 8th International Symposium on Utilization of High-Strength and High-Performance Concrete, Tokyo, Japan.
• CSI, 2002. Integrated Finite Element Analysis and Design of Structures Basic Analysis Reference Manual, SAP2000 V.8, Computers and Structures, Inc. C.A., USA.
• Dancygier A.N. and Savir Z., 2006. Flexural behavior of HSFRC with low reinforcement ratios. Engineering Structures, 28, 1503–1512.
• Fehling E, Schmidt M, Walraven J, Leutbecher T, Frönlich S., 2014. Ultra-High Performance Concrete UHPC, Betonkalender, Wilhelm Ernst & Sohn.
• Graybeal, B.A., 2007, Compressive Behavior of Ultra- High-Performance Fiber-Reinforced Concrete, ACI Materials Journal, 104 (2), 146-152.
• JSCE, 2008. Recommendations for Design and Construction of High Performance Fiber Reinforced Cement Composites with Multiple Fine Cracks; Concrete Engineering Series, 82, Japan Society of Civil Engineers.
• Kamal M.M., Safan M.A., Etman Z.A. and Salama R.A., 2014. Behavior and strength of beams cast with ultra high strength concrete containing different types of fibers. HBRC Journal, 10(1), 55-63.
• Moreillon L. and Menétrey P. 2013. “Rehabilitation and Strengthening of Existing RC Structures with UHPFRC: Various Application.” RILEM-fib-AFGC Int. Symposium on Ultra-High Performance Fibre- Reinforced Concrete, France: RILEM Publication S.A.R.L ,127-136.
• Naaman A.E., 2007. High performance fiber reinforced cement composites classification and applications CBM–C1 International workshop. Karachi, Pakistan., p.389–400.
• Park R. 1988. Ductility evaluation from laboratory and analytical testing. Proceedings of the 9th World Conference on Earthquake Engineering, Tokyo, Kyoto, 8, 605-616.
• Richard P. and Cheyrezy M., 1995. Composition of reactive powder concretes. Cement and Concrete Research, 25(7), 1501–1511.
• Roy D.M., Gouda G.R. and Bobrowsky A., 1972. Very high strength cement pastes prepared by hot pressing and other high pressure techniques. Cement and Concrete Research, 2, 349–366.
• Russell H.G. and Graybeal B.A. 2013. Ultra-High Performance Concrete: A State-of-the-Art Report for the Bridge Community; FHWA Publication HRT-13- 060. Federal Highway Administration. June.
• SAMARIS, 2005. Report D22, Full scale application of UHPFRC for the rehabilitation of bridges - from the lab to the field, European project 5th FWP /
• SAMARIS - Sustainable and Advanced Materials for Road Infrastructures - WP 14: HPFRCC.
• Stürwald, S. and Fehling, E., 2012. Design of Reinforced UHPFRC in Flexure. in “Ultra High Performance Concrete and Nanotechnology in Construction, 3rd Intl. Symp. on Ultra High Performance Concrete and Nanotechnology for High Performance Construction Materials”, Structural Materials & Engineering Series No. 19 174 References, Kassel University Press GmbH, Kassel, pp. 443–450.
• Voo Y.L., Poon W.K. and Foster S.J., 2010. Shear strength of steel fiber-reinforced ultra-high performance concrete beams without stirrups. Journal of Structural Engineering, 136 (11), 1393–1400.
• Wang C., Yang C., Liu F., Wan C. and Pu X., 2012. Preparation of Ultra-High Performance Concrete with common technology and materials. Cement and Concrete Composites, 34, 538-544.
• Wille K., Naaman A.E., El-Tawil S. and Parra-Montesinos G.J., 2012. Ultra-high performance concrete and fiber reinforced concrete: achieving strength and ductility without heat curing. Materials and Structures, 45, 309-324.
• Yazıcı H. Yardımcı M.Y., Aydın S. and Karabulut A.S., 2009. Mechanical properties of reactive powder concrete containing mineral admixtures under different curing regimes. Construction and Building Materials; 23,1223–31.
• Yang I.H., Joh C. and Kim B.S., 2010. Structural behavior of ultra high performance concrete beams subjected to bending. Engineering Structures, 32, 3478-3487.
• Yudenfreund M., Skalny J., Mikhail R.S. and Brunauer S., 1972. Hardened portland cement pastes of low porosity, II. Exploratory studies. Dimensional changes. Cement and Concrete Research, 2(3):331– 348