An Experimental Study on the Behavior of Reinforced Concrete Beams Having Different Angled Cold Joints in the Shear Zone under

Year 2024, Volume: 16 Issue: 1, 496 - 506, 31.01.2024

Süleyman Kamil Akın , Hediye Güz

https://doi.org/10.29137/umagd.1408221

Abstract

Concrete casting of interconnected structural elements such as columns and beams should be made in one piece during the construction stage of reinforced concrete structures. However, cold joints occur when concrete casting is incomplete due to variety reasons. Cold joint is a manufacturing defect that causes adherence weakness at the concrete interface as a result of casting concrete at different times. The aim of this study is to determine the effect of different angled cold joints in the shear zone on the behaviour and load carrying capacity of 4 point loaded beams under bending. For this aim, seven 1/2 scaled RC beam specimens having dimensions 150x300x3000 mm with different cold joint angles and with and without additional reinforcement at cold joints were tested. Load-Displacement curves, Yield Load, Maximum Load, Maximum Displacement, Ductility, Stiffness and Energy Dissipation Capacities of the specimens were compared.

Keywords

Cold joint reinforced concrete beams, bending behaviour, shear zone and concrete casting

Bending Kesme Bölgesinde Farklı Açılarda Soğuk Derzlere Sahip Betonarme Kirişlerin Eğilme Etkisi Altındaki Davranışının İncelenmesi Üzerine Deneysel Bir Çalışma

Abstract

Betonarme yapıların inşaat aşamasında kolon, kiriş gibi birbirine bağlı yapı elemanlarının beton dökümü tek parça halinde yapılmalıdır. Ancak çeşitli nedenlerden dolayı beton dökümü tamamlanamadığında soğuk derzler ortaya çıkmaktadır. Soğuk derz, betonun farklı zamanlarda dökülmesi sonucu beton ara yüzeyinde aderans zayıflığına neden olan bir imalat hatasıdır. Bu çalışmanın amacı, kesme bölgesindeki farklı açılı soğuk derzlerin, 4 nokta yüklü kirişlerin eğilme altındaki davranışına ve yük taşıma kapasitesine etkisini belirlemektir. Bu amaçla, 150x300x3000 mm boyutlarında, farklı soğuk bağlantı açılarına sahip, soğuk bağlantı noktalarında ilave donatı bulunan ve bulunmayan 7 adet 1/2 ölçekli RC kiriş numunesi test edilmiştir. Numunelerin Yük-Deplasman eğrileri, Akma Yükü, Maksimum Yük, Maksimum Deplasman, Süneklik, Rijitlik ve Enerji Tüketim Kapasiteleri karşılaştırılmıştır.

Keywords

Soğuk derzli betonarme kirişler, eğilme davranışı, kesme bölgesi ve beton dökümü

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