Gazbeton Malzemesinden Üretilmiş Duvarların Çelik Lifli Beton Panellerle Güçlendirilmesi: Deneysel Çalışma

Yıl 2019, Cilt: 22 Sayı: 2, 335 - 340, 01.06.2019

Alper Büyükkaragöz Nuri Sevil Yağmur Kopraman

https://doi.org/10.2339/politeknik.389644

Öz

Yığma yapılarda duvarların deprem yükleri altında yetersiz yatay
dayanım ve rijitliğe sahip oldukları için hasar görme olasılıkları oldukça
yüksektir. Yığma duvarlara yeterli dayanım ve rijitlik kazandırılması için
mantolama, katman ekleme vb. gibi farklı yöntemler uygulanarak pek çok deneysel
çalışma yapılmıştır. Ancak bu yöntemlerin etkin olmalarının yanında, uzun bir
yapım süresi gerektirmesi ve mimari görüntünün bozulmasından dolayı yeni bir
uygulamanın geliştirilmesi gerekmektedir. Bu çalışmada, çelik lifli beton
paneller kullanılarak yığma duvarların ucuz, kolay üretilebilir ve pratik bir
biçimde güçlendirilmesi sağlanmıştır. Çalışma kapsamında, gazbeton (GB)
kullanılarak üretilen toplam 4 adet duvardan 3’ü belli oranlarda çelik lif
kullanılarak üretilmiş beton panellerle güçlendirilmiştir. Deneyler sonucunda;
deney elemanları arasındaki dayanım, deformasyon ve enerji tüketme kapasiteleri
karşılaştırılarak değerlendirilmiştir.

Anahtar Kelimeler

Gazbeton, beton panel, güçlendirme, çelik lif

Strengthening Of Walls Produced From Aerated Concrete Material With Steel Fibered Concrete Panels: Experimental Study

Öz

Due to their insufficient
lateral strength and rigidity under earthquake loads, the walls are vulnerable
to damage in masonry buildings. Various methods such as jacketing and adding of
layers, etc. have been studied for many years in order to improve lateral
resistance and strength of the masonry walls. These methods are effective,
however, they require a long application period and the

implementation of these methods may cause loss of architectural functionality
and deteriorate structural aesthetics. Therefore, the development of a new
technique would be quite useful. In this study, masonry walls are strengthened with
containing steel fibers, which are cheap, easy to produce and practical. This study
presents the  results of the tests on
four walls built with aerated concrete (GB), three of which were strengthened
symmetrically using by concrete panels with specified amount of steel fibers. The
results of the experiments are discussed with regard to strength, deformation
and energy dissipation capacity.

Anahtar Kelimeler

Aerated concrete, concrete panel, strengthening, steel fiber

Kaynakça

• [1] Albert M.L., Elwi A.E., Cheng J.J.R., “Strengthening of unreinforced masonry walls using FRPs”, Journal of Composites for Construction, 5 (l): 76-84, (2001)
• [2] Korany Y., Drysdale R., “Rehabilitation of masonry walls using unobtrusive FRP techniques for enhanced out-of-plane seismic resistance”, Journal of Composites for Construction, 10 (3): 213-22, (2006).
• [3] Tan K.H., Patoary M.K.H., “Strengthening of masonry wall against out-of-plane loads using fiber-reinforcement polymer reinforcement”, Journal of Composites for Construction, 8 (l): 79-87, (2004).
• [4] Turco V., Secondin S., Morbin A., Valluzzi M.R., Modena C., “Flexural and shear strengthening of unreinforced masonry with FRP bars”, Composites Science and Technolgy,66 (2): 289-296, (2005).
• [5] Yang Q., “Strengthening of unreinforced masonry walls using FRP techniques under out-of-plane loading”, School of Civil and Environmental Engineering, The University of Adelaide, Master of Engineering Science, 2007.
• [6] Hamed E., Rabinovitch Q., “Failure characteristics of FRP-strengthened masonry walls under out-of-plane loads”, Engineering Structures, 32 (8): 2134-2145, (2010).
• [7] Camli U.S., Binici B., “Strength of carbon fiber reinforced polymers bonded to concrete and masonry”, Construction and Building Materials, 21 (7): 1431-1446, (2007).
• [8] Capozucca R., “Experimental FRP/SRP-historic masonry delamination”, Composite Structures, 92 (4): 891-903, (2010).
• [9] Aiello M.A., Sciolti S.M., “Bond analysis of masonry structures strengthened with CFRP sheets”, Construction and Building Materials, 20 (1): 90-100, (2006).
• [10] Dizhur D., Ismail N., Knox C.,. Lumantama R, Ingham J. M., “Performance of unreinforced and retrofitted masonry buildings during the 2010 Darfield earthquake”, Bull. N. Z. Society Earthquake Engineering, 43 (4): 321-329, (2010).
• [11] Corradi M., Borri A., Vignoli A., “Experimental evaluation of in-plane shear behavior of masonry walls retrofitted using conventional and innovative methods”, Masonry International, 21 (1): 29-41.(2008)
• [12] Andrew S., Thomas R., “A critical review of retrofitting methods for unreinforced masonry structures”, in:The Royal Academy of Engineering, EWB-UK Research Conference, (2009).
• [13] Valluzzi M.R., Tinazzi D., Modena C., “Shear behavior of masonry panels strengthened by FRP laminates”. Construction and Building Materials, 16 (7): 409-416, (2002).
• [14] El-Dakhakhni W.W., Hamid A.A., Hakam Z.H.R., Elgaly M., “Hazard mitigation and strengthening of unreinforced masonry walls using composites”, Composite Structures, 73 (4): 458-477, (2006).
• [15] Shahzada K., Javed M., Alam B., Khan M., Ali Z., Kahan H., Shah S.S.A., “Strengthening of brick masonry walls against earthquake loading”, International Journal of Advanced Structures & Geotechnical Engineering, 1 (1), 10-14, (2012).
• [16] Corradi M., Borri A., Vignoli A., “Experimental study on the determination of strength of masonry walls”, Construction and Building Materials, 17 (5): 325-337, (2003).
• [17] Sathiparan N., Paola M., Kimiro M., “Parametric study on diagonal shear and out of plane behavior of masonry wallets retrofitted by PP-band mesh”, in: 14 WCEE. World Conference on Earthquake Engineering. Bejing, (2008).
• [18] Kalali A., Kabir M. Z., “Experimental response of double-wythe masonry panels strengthened with glass fiber reinforced polymers subjected to diagonal compression tests”, Engineering Structures, 39: 24-37, (2012).
• [19] “Turkish Earthquake Code”, T.C. Bayındırlık ve İskan Bakanlığı Afet İşleri Genel Müdürlüğü Deprem Araştırma Dairesi. Ankara, (2007).
• [20] “Bina Sayımı”, T.C. Başbakanlık Devlet İstatistik Enstitüsü, Ankara, (2000).
• [21] ASTM C270, “Standard Specification for Mortar for Unit Masonry, American Society for Testing and Materials”, West Conshohocken, PA, (2012).
• [22] ASTM E447, “Test Methods for Compressive Strength of Laboratory Constructed Masonry Prisms, American Society for Testing and Materials”, West Conshohocken, PA, (1998).
• [23] ASTM E591, “Standard Test Method for Diagonal Tension (Shear) in Masonry Assemblages, American Society for Testing and Materials”, West Conshohocken, PA, (1981).
• [24] Zhou D., Lei Z., Wang J., “In-plane behavior of seismically damaged masonry walls repaired with external BFRP”, Composite Structures, 102: 9-19, (2013).