The Importance of Reinforcement Placement and Concrete Cover in Reinforced Concrete Beam Performance

Orhan Doğan; Berkay Çakır; Yunus Genç; Orhan Gazi Odacıoğlu

doi:10.29137/umagd.1490528

EN TR

The Importance of Reinforcement Placement and Concrete Cover in Reinforced Concrete Beam Performance

Abstract

Concrete, which has been used as a building material in the construction industry for many years, is a brittle material with high compressive strength and low tensile strength, and is supported by steel reinforcement, which is a ductile material, especially in tensile zones. For this reason, adherence, which is the interface shear stress that provides the interlock between concrete and reinforcement, is the reason for the existence of reinforced concrete. Adherence can only be achieved with appropriate reinforcement placement and concrete cover. For this reason, errors that may occur in the application directly affect adherence. In this study, in order to investigate the consequences of errors in reinforcement placement and concrete cover thickness during application, 8 reinforced concrete beams in 4 different groups of 1/2 scale, with a cross section of 15x30 cm and a length of 205 cm were produced and it was aimed to experimentally determine the effect of the placement of the tensile zone reinforcement in the beam span and the adherence caused by the concrete cover on the beam performance. As a result of the three-point bending test, it was observed that if the concrete cover and reinforcement placement are made in accordance with the standards, the maximum bearing capacity decreases due to the increased adherence, while the leading cracks in reinforced concrete beams occur under higher loads, more number of capillary cracks are formed instead of large cracks and the beams behave more rigid. In cases where adherence is not achieved, ribbed reinforcement behaves similar to the behaviour of plain reinforcement and forms wide cracks by stripping.

Keywords

Reinforced concrete beam , Concrete cover , Adherence , Reinforcement , Concrete

Betonarme Kiriş Performansında Donatı Yerleşiminin ve Beton Örtüsünün Önemi

Öz

Uzun yıllardır inşaat sektöründe yapı malzemesi olarak kullanılan beton basınç dayanımı yüksek, çekme dayanımı düşük ve gevrek bir malzeme olduğu için özellikle çekme bölgelerinde sünek bir malzeme olan çelik donatı ile desteklenmektedir. Bu sebeple beton ile donatı arasındaki kenetlenmeyi sağlayan ara yüzey kayma gerilmesi olan aderans, betonarmenin varoluş nedenidir. Aderans ancak uygun donatı yerleşimi ve beton örtüsü ile elde edilebilmektedir. Bu sebeple uygulamada oluşabilecek hatalar aderansı doğrudan etkilemektedir. Bu çalışmada, uygulama esnasında donatı yerleşimi ve beton örtüsü kalınlığında yapılacak hataların ne gibi sonuçları olabileceğini araştırmak amacıyla 1/2 ölçekli, kesiti 15x30 cm olan ve uzunluğu 205 cm olan 4 farklı grupta 8 adet betonarme kiriş üretilerek, kiriş açıklığındaki çekme bölgesi donatısının yerleşiminin ve beton örtüsünden kaynaklı aderansın kiriş performansına etkisinin deneysel olarak belirlenmesi amaçlanmıştır. Yapılan üç noktalı eğilme deneyi sonucunda, beton örtüsünün ve donatı yerleşiminin standartlara uygun yapılması durumunda artan aderansa bağlı olarak; maksimum taşıma kapasitesi düşerken, betonarme kirişlerde öncül çatlakların daha yüksek yüklemeler altında meydana geldiği, geniş çatlaklar yerine daha fazla sayıda kılcal çatlakların oluştuğu ve kirişlerin daha rijit davrandığı görülmüştür. Aderansın sağlanamadığı durumlarda nervürlü donatıların düz donatı davranışına benzer şekilde davranıp, sıyrılarak geniş çatlaklar oluşturduğu görülmüştür.

Anahtar Kelimeler

Betonarme kiriş , Beton örtüsü , Aderans , Donatı , Beton

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Details

Primary Language

English

Subjects

Reinforced Concrete Buildings

Journal Section

Research Article

Authors

Orhan Doğan
0000-0002-4942-1725
Türkiye

Berkay Çakır ^*
0009-0001-9939-6601
Türkiye

Yunus Genç
0000-0002-1163-0724
Türkiye

Orhan Gazi Odacıoğlu
0000-0002-6838-1183
Türkiye

Early Pub Date

March 3, 2025

Publication Date

March 15, 2025

Submission Date

May 27, 2024

Acceptance Date

July 25, 2024

Published in Issue

Year 2025 Volume: 17 Number: 1

DOI

https://doi.org/10.29137/umagd.1490528

IZ

https://izlik.org/JA37YA35PP

APA

Doğan, O., Çakır, B., Genç, Y., & Odacıoğlu, O. G. (2025). The Importance of Reinforcement Placement and Concrete Cover in Reinforced Concrete Beam Performance. International Journal of Engineering Research and Development, 17(1), 182-197. https://doi.org/10.29137/umagd.1490528

Kırıkkale University, Faculty of Engineering and Natural Science, 71450 Yahşihan / Kırıkkale, Türkiye.

ijerad@kku.edu.tr

The Importance of Reinforcement Placement and Concrete Cover in Reinforced Concrete Beam Performance

Abstract

Keywords

Betonarme Kiriş Performansında Donatı Yerleşiminin ve Beton Örtüsünün Önemi

Öz

Anahtar Kelimeler

References

Details

Primary Language

Subjects

Journal Section

Authors

Early Pub Date

Publication Date

Submission Date

Acceptance Date

Published in Issue

DOI

IZ

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