Hysteretic behavior of RC shear walls strengthened with CFRP strips

Altın, Sinan; Anıl, Özgür; Kopraman, Yağmur; Kara, M. Emin

doi:10.1016/j.compositesb.2012.05.009

Cited by 48 publications

(19 citation statements)

References 3 publications

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“…Bir diğer çalışmada Altin vd. [41] dört farklı (yatay, X şeklinde, X ile yatay ve X ile paralel kombinasyon) şekilde perde duvarları CFRP ile sargılayarak sismik davranışlarını iyileştirmeyi amaçlamışlardır. CFRP ile güçlendirilmiş perde duvarlar hem yanal deplasman ve yük hem de enerji sönümleme kapasitesini arttırmıştır.…”

Section: Betonarme Perde Duvarlarda Frp Uygulamalarıunclassified

“…Altin vd. [41] perde duvar güçlendirme şekilleri ve kesme kuvveti-ötelenme oranı grafikleri X ile yatay ve X ile paralel uygulama da ise eğilme ve kesme göçmesi beraber gözlemlenmiştir. Dolayısıyla güçlendirme yapılmayan ve X şeklinde güçlendirme yapılan perde duvarlar düktil olmayan bir davranış sergilemekle beraber, diyagonal kesme çatlakları perde tabanında yoğunlaşmıştır.…”

Section: Betonarme Perde Duvarlarda Frp Uygulamalarıunclassified

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Betonarme Perde Duvarlarin Yapi Malzemesi̇ Açisindan Değerlendi̇ri̇lmesi̇

Aydın¹,

Bayrak²

2020

Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

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Perde duvarlar yüksek yanal rijitliklerinden dolayı deprem, rüzgâr gibi yatay kuvvetlerini karşılamada en çok tercih edilen yapı elemanlarıdır. Gelişen teknoloji ile birlikte hem yapı malzemelerindeki hem de deney düzeneklerindeki gelişmeler ışığında perde duvarların farklı yöntemlerle incelenmesine olanak sağlanmıştır. Bu çalışma kapsamında uzun yıllar boyunca betonarme perde duvarlar için genel kabul görmüş parametreler yerine yenilikçi malzemeler ve deney koşulları bakımından ele alınmıştır. Betonarme perde duvarlar gerek lifli beton, hafif veya yüksek dayanımlı beton, FRP donatılar gibi malzemeler gerekse de donma-çözülme, korozyon, güçlendirme gibi amaçlarla irdelenmiştir. Yüksek katlı binalarda kullanımı neredeyse zorunlu hale gelen betonarme perde duvarların önümüzdeki yıllar içerisinde geleneksel çelik donatı düzeninin yerine daha yüksek mekanik ve durabilite özelliklerine sahip donatılara, geleneksel betonun yerine geleneksel betonun zayıflıklarının giderileceği özel çimento esaslı kompozitlerle üretileceği aşikârdır. Bununla birlikte tipik beton ve donatılı perde duvarlar yerine kompozit malzemelere kayacağı da beklenilmektedir. Çalışma kapsamında betonarme perde duvarların yapı malzemeleri perspektifinde davranışları ele alınmıştır.Shear walls are the most preferred structural elements to resist the horizontal loads due to high lateral stiffness. With the advancing technology, it has allowed the shear walls to be examined with different methods in the light of developments in both building materials and experimental setups. RC shear walls have been examined in terms of both the materials such as fiber concrete, lightweight concrete, high-strength concrete, fiber-reinforced polymer (FRP) bars, freeze-thaw resistance, corrosion resistance, and strengthening. It is expected that RC shear walls will be produced with reinforcements with higher mechanical and durability characteristics in the coming years, instead of the conventional steel reinforcement arrangement. It is obvious that instead of conventional concrete, it will be produced with special type cement-based composites, where the weaknesses of conventional concrete will be eliminated. The paper presents the behavior of RC shear walls within the constructional materials perspective.

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Section: Betonarme Perde Duvarlarda Frp Uygulamalarıunclassified

Betonarme Perde Duvarlarin Yapi Malzemesi̇ Açisindan Değerlendi̇ri̇lmesi̇

Aydın¹,

Bayrak²

2020

Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

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“…To verify the results obtained from ABAQUS/CAE, a shear wall studied by Altin et al (2013) was selected. The shear wall with a scale of 1/2 relative to the actual wall was constructed in the laboratory with dimensions of 1000×1500×10 mm.…”

Section: Validation Of Numerical Analysismentioning

confidence: 99%

Structural behavior of FRP-strengthened reinforced concrete shear walls with openings using finite element method

Aslani

Kohnehpooshi

2017

Advances in Structural Engineering

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Reinforced concrete shear walls with features such as high stiffness, good performance in earthquakes, ductility, and high bearing capacity in earthquake-prone regions are widely used as convenient and reliable structural systems in medium-and high-rise reinforced concrete buildings. However, due to architectural limitations, the use of opening in shear walls is unavoidable. Fiber-reinforced polymer sheets with unique structural characteristics and easy implementation have been used in recent years for rehabilitating concrete structures, especially shear walls. In this study, using the finite element method, the effect of openings with different sizes and locations in reinforced concrete shear walls was studied. The effect of retrofitting specimens with openings by carbon fiber-reinforced polymer sheets with different patterns and thicknesses on the structural behavior of shear walls was also investigated. According to the results, opening reduced the bearing capacity, energy absorption capacity, and stiffness but increased wall displacement. Different reinforcement patterns and different thicknesses of carbon fiber-reinforced polymer sheets had different effects on improved structural behavior of shear walls. Reinforcement with carbon fiber-reinforced polymer sheets is one of the effective ways to rehabilitate concrete shear walls with opening.

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“…The results indicated that the repaired wall showed improvement in the original strength with less initial stiffness and energy dissipation capacity. Altin et al (2013) have constructed and tested five shear walls strengthened with CFRP strips with different configurations under reversed cyclic lateral loading. The experimental results indicated that the best performance has been obtained from the strengthening with lateral strips and showed the improvement of hysteretic behavior and displacement capacity as well.…”

Section: Introductionmentioning

confidence: 99%

Strengthening of reinforced concrete shear walls with openings using carbon fiber-reinforced polymers

Husain

Eisa

Hegazy

2019

Int J Adv Struct Eng

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Reinforced concrete shear walls are one of the most widely used lateral load structural resisting elements in high rise buildings. Introducing openings in existing shear walls may be due to remodeling or municipality considerations, such as placement of staircases, windows, doors and elevators. Making openings in existing shear wall decrease the overall structural capacity and integrity of the wall, in addition to stress concentrations around the openings. This necessitates the strengthening of the opening rim with FRP wraps. This paper focuses on developing a 3D high-reliability dynamic nonlinear finite element model on ABAQUS theory manual and users' manual, version 6.10 (2010) to simulate the behavior of shear walls with openings strengthened with FRP wraps to investigate their seismic response under the monotonic loads. The proposed FE model has been validated using previous experimental data in literature. The FE results indicated that the proposed configuration of CFRP laminates substantially increases the lateral load strength and deformation capacity of the shear wall with openings and also improves the ductility and energy dissipation of the shear wall.

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Hysteretic behavior of RC shear walls strengthened with CFRP strips

Cited by 48 publications

References 3 publications

Betonarme Perde Duvarlarin Yapi Malzemesi̇ Açisindan Değerlendi̇ri̇lmesi̇

Betonarme Perde Duvarlarin Yapi Malzemesi̇ Açisindan Değerlendi̇ri̇lmesi̇

Structural behavior of FRP-strengthened reinforced concrete shear walls with openings using finite element method

Strengthening of reinforced concrete shear walls with openings using carbon fiber-reinforced polymers

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