Retrofit of Non-Ductile RC Frames with Precast Concrete (PC) Wall Panels

Baran, Mehmet; Tankut, Tuğrul

doi:10.1260/1369-4332.14.6.1149

Cited by 13 publications

(6 citation statements)

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“…In previous studies (Baran et al, 2010;Baran and Tankut, 2011a;2011b), plates were bonded on to the mortar coated hollow brick infill walls using an effective but at the same time an expensive import material. Although the tile adhesive for bonding of plates showed unspectacular bonding performance as compared to this material, it will obviously make the technique more economical which is one of the most important criterion in application.…”

Section: Discussionmentioning

confidence: 99%

“…Studies on strengthening of masonry infilled walls with carbon fiber reinforced polymer (CFRP) (Antoniades et al, 2005;Erdem et al, 2006;Binici and Özcebe, 2006;Altın et al, 2008), shotcrete with mesh reinforcement (Kahn, 1984;Alcocer et al, 1996;Acun and Sucuoğlu, 2005;Korkmaz et al, 2010), steel plates (Taghdi et al, 2000a;2000b;Farooq et al, 2006), steel fiber reinforced mortar (Sevil et al, 2011) and prefabricated panel infills (Frosch et al, 1996a;1996b;Frosch, 1996;1999;Baran and Tankut, 2011a;2011b) can be found. In addition, innovative materials such as textiles (Papanicolaou et al, 2011), ferrocement (Topçu et al, 2005;Amanat et al, 2007), epoxy and mortar injection (ElGawady et al, 2004) have also been used in strengthening of the hollow brick infill walls.…”

Section: Introductionmentioning

confidence: 99%

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Occupant friendly seismic retrofit by concrete plates

Baran

Aktas

2013

J. Zhejiang Univ. Sci. A

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An innovative occupant friendly retrofitting technique has been developed for reinforced concrete (RC) building structures with hollow brick infill walls used as partition walls which constitute the major portion of the existing building stock in Turkey. The idea is to convert the existing hollow brick infill wall into a load carrying system acting as a cast-in-place RC wall by reinforcing it with relatively thin concrete plates bonded to the mortar coated infill wall by use of tile adhesive and fixed by 6 (6 mm diameter) bolts. Test parameters were the shape and thickness of the plates, presence of reinforcement in plates, number and arrangement of 6 bolts. It was observed that lateral strength, stiffness, energy dissipation capacity, and ductility of the strengthened infill walls were improved and behaviour was enhanced by the proposed technique. Plates with two different basic shapes were used to strengthen the test specimens.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Occupant friendly seismic retrofit by concrete plates

Baran

Aktas

2013

J. Zhejiang Univ. Sci. A

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“…However, a large number of existing masonry-infilled RC frames, which were designed and built according to out-of-date codes, are still in service in potential earthquake regions across the world. These RC frames are commonly referred to as substandard or nonductile frames (Baran and Tankut, 2011; Ozcelik et al, 2011; Wang et al, 2016; Zou et al, 2007). The masonry infills of these frames are generally poorly connected to the bounding frames and thus face at high risk of collapse under the future strong earthquakes.…”

Section: Introductionmentioning

confidence: 99%

Numerical modeling and seismic evaluation of masonry-infilled reinforced concrete frames retrofitted with carbon fiber–reinforced polymer wraps

Pan

Yan

Wang

et al. 2018

Advances in Structural Engineering

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This article investigates the efficiency of various retrofitting schemes using carbon fiber-reinforced polymers in improving the seismic performance of a substandard masonry-infilled reinforced concrete frame. One virtual five-story reinforced concrete frame was designed according to out-of-date Chinese codes. In total, 15 carbon fiber-reinforced polymers retrofitting schemes were adopted before earthquakes, and three sets of earthquakes representing low, medium, and high frequency contents were selected to conduct the incremental dynamic analysis. The influence of infills' collapse due to out-of-plane effect was discussed detailedly, and then, the effectiveness of different retrofitting schemes was evaluated. It was found that the collapse of infills obviously reduced the seismic capacity and finally resulted in a soft-story failure mechanism for the reinforced concrete frame. For earthquakes with low frequency content, the enhancement efficiency of retrofitting infills or both columns and infills was increased with the increase in the number of retrofitted stories; however, for medium and high earthquake frequency contents, retrofitting infills or both columns and infills were inefficient when less than half of the structure height was retrofitted. Among the adopted 15 schemes, carbon fiber-reinforced polymers retrofit of both columns and infills along the full building height was found to be the most efficient. Improper selection of a retrofitting scheme could lead to the change of soft-story location. The inter-story drift ratio capacity of effectively retrofitted frames can meet the requirements of current seismic code.

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“…Birçok araştırmacı yapı davranışı üzerinde olumlu katkıları bulunan sıvanmış tuğla dolgu duvarları değişik yöntem ve çeşitli malzemeler kullanarak güçlendirmişlerdir. Bu yöntemler arasında karbon lifli polimer kumaş [9][10], hasır donatılı püskürtme beton [11], çelik lifli sıva [12], çelik şeritlerle [13] ve önüretimli yüksek dayanımlı betonarme panellerle [14,15] güçlendirme sayılabilir. Bu yöntemlere ek olarak güçlendirme malzemesi olarak çeşitli tekstiller kullanarak [16], ferrocement kullanarak [17], epoksi ve harç enjeksiyonu kullanarak yapılan diğer güçlendirme yöntemleri [18] sayılabilir.…”

Section: Gi̇ri̇ş (Introduction)unclassified

“…Betonarme panellerin kullanıldığı yöntemde BA dolgu duvar seviyesinde performans artışı elde edilmiştir. Bu çalışmada, daha önce gerçekleştirilmiş çalışmalarda [14,15] kullanılan önüretimli yüksek dayanımlı BA paneller yerine yerinde dökme normal dayanımlı beton paneller kullanarak ve bunları ithal ve pahalı olan epoksi bazlı yapıştırıcı (Sikadur 31 [19]) ile değil de ucuz ve piyasada bolca bulunan yerli üretim fayans yapıştırıcısı (KALEKİM [20] Enerji dağıtma kapasitesi bir yapının kuvvetli yer hareketlerine karşı direnç gösterebilmesinin ve davranıştaki olası iyileşmenin bir göstergesidir. Tüm elemanlar için bu değer, yatay yük-ötelenme grafiklerindeki tüm çevrimlerin alanlarının toplanması ile elde edilmiştir.…”

Section: Gi̇ri̇ş (Introduction)unclassified

Sıvanmış Tuğla Dolgu Duvarların Şerit Beton/Betonarme Panellerle Güçlendirilmesi

Baran¹,

Aktas²,

Aykaç³

2014

Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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ÖZETTürkiye'deki yapı stoğunun çok önemli bir bölümünün depreme karşı dayanıksız olduğu ve güçlendirilmesi gerektiği bilinmektedir. Yerinde dökülen ve yapıların çerçeve sistemlerine epoksili ankraj çubuklarıyla bağlanan betonarme (BA) dolgu duvarların yapının deprem davranışını önemli ölçüde iyileştirdiği bilinmektedir. Fakat bu yöntemin binanın boşaltılmasını ve uzun bir süre şantiyeye dönüştürmesini gerektirmesi, araştırmacıları hane sakinlerini sokağa dökmeden olabildiğince ekonomik ve aynı zamanda yapısal olarak etkili güçlendirme yöntemleri geliştirmeye yöneltmiştir. Bu çalışmada önerilen güçlendirme yönteminin prensibi yapıda var olan sıvanmış tuğla dolgu duvarların bazılarının, üzerine yapıştırılan şerit beton panellerle güçlendirilerek birer BA dolgu duvara dönüştürülmesidir. Bu amaçla, mevcut çalışma kapsamında ½ ölçeğe sahip toplam yedi adet sıvanmış tuğla duvar elemanı tersinir tekrarlanır yatay yükler altında test edilmişlerdir. Altı adet deney elemanı şerit beton/betonarme (BA) paneller yapıştırılarak güçlendirilmiştir. Deney sonuçları, beton panel yapıştırma uygulamasının deney elemanlarının yatay yük taşıma kapasitelerini artırdığını ve davranışlarını iyileştirdiğini göstermiştir.Anahtar kelimeler: BA dolgu duvar, güçlendirme, sıvanmış tuğla dolgu duvar, şerit beton/BA panel, tersinir tekrarlanır yatay yük STRENGTHENING OF PLASTERED HOLLOW BRICK INFILL WALLS USING STRIP CONCRETE/REINFORCED CONCRETE PANELS ABSTRACTIn Turkey, majority of the building stock is known to be inadequate against earthquake and is required to be strengthened. Cast-in-place reinforced concrete (RC) infill walls, connected to the frame systems by use of epoxy glued anchorages, improve the behavior of the building significantly. However, requirements of this technique such as evacuation of the building and converts it to a construction area for a long time have directed the researchers developing occupant friendly, economic and structurally effective strengthening techniques. The principle of the technique presented in this paper is based on bonding strip concrete panels on some of the plastered hollow brick infill walls available in the building such that they will behave as RC infill walls. For this purpose, seven plastered hollow brick infill wall specimens with a scale of ½ were tested under reversed cyclic lateral loading. Six wall specimens were strengthened with strip concrete/reinforced concrete (RC) panels. Test results showed that application of concrete panels increased lateral strength of the test specimens and improved their behavior.

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Retrofit of Non-Ductile RC Frames with Precast Concrete (PC) Wall Panels

Cited by 13 publications

References 11 publications

Occupant friendly seismic retrofit by concrete plates

Occupant friendly seismic retrofit by concrete plates

Numerical modeling and seismic evaluation of masonry-infilled reinforced concrete frames retrofitted with carbon fiber–reinforced polymer wraps

Sıvanmış Tuğla Dolgu Duvarların Şerit Beton/Betonarme Panellerle Güçlendirilmesi

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