Journals / Düzce Üniversitesi Bilim ve Teknoloji Dergisi / 2018 / Cilt: 6 - Sayı: 2

The Effect of Strand Configuration on Stress Distribution and Debonding Parameters of Prestressed Girder After Detensioning

Öngerme Kablo Düzeninin Aktarma Dönemi Sonrası Kirişin Gerilme ve Kılıflama Parametremeleri Üzerindeki Etkisi

Pages
401–408
Publication Date
2022-10-12
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

At the end of the study, numerically identified stress distribution and calculated debonding parameters of girders compared with each other.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:The aim of this paper is to examine the effect of strand configuration on stress distribution and debonding parameters of precast, pretensioned concrete girders after prestressing force is transferred from strands to concrete by bond at their interface.
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Key Findings & Data:One of the typical precast girder with 90 cm height is considered in this study.
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Conclusion & Impact:At the end of the study, numerically identified stress distribution and calculated debonding parameters of girders compared with each other.
🔬Design:Modeling & Simulation
📍Scope:2000 Verileri
⚙️Variables:Kılıflama 1 · Sonlu eleman 2 · Öngerilmeli kiriş 3

Abstract

The aim of this paper is to examine the effect of strand configuration on stress distribution and debonding parameters of precast, pretensioned concrete girders after prestressing force is transferred from strands to concrete by bond at their interface. Determination of strand configuration is important as well as determination of number of strands because it affects stress distribution and debonding parameters of girders. The debonding of strands is an application in order to control the tensile and compressive stresses at the support zone of girder. One of the typical precast girder with 90 cm height is considered in this study. To determine the effect of strand configuration, nine girders with the same cross-section, effective span length and material properties but different strand configuration are selected as an application. Equal prestressing force is applied all strands simultaneously. Three dimensional finite element models (FEM) of girder are constituted using SAP 2000 software. At the end of the study, numerically identified stress distribution and calculated debonding parameters of girders compared with each other.

Özet

Bu çalışmada ön döküm öngerilmeli beton kirişlerde öngerilme kuvvetinin öngerme kablolarından betona aktarılmasından sonra öngerme kablo düzeninin gerilme dağılımı ve kılıflama parametreleri üzerindeki etkisinin belirlenmesi amaçlanmıştır. Öngerme kablolarının diziliminin belirlenmesi, kablo sayısının belirlenmesi kadar önemli olmaktadır. Çünkü bu durum gerilme dağılımını ve kılıflama parametrelerini etkilemektedir. Kılıflama işlemi öngerilmeli kirişin mesnet bölgelerinde meydana gelen çekme ve basınç gerilmelerini kontrol etmek için kullanılmaktadır. Bu çalışmada 90 cm yüksekliğe sahip öngerilmeli kiriş örnek olarak seçilmiştir. Öngerilme düzeninin etkisini belirlemek için, kesit alanı, efektif hesap açıklığı ve malzeme özellikleri aynı öngerme kablo düzeni birbirinden farklı dokuz adet kiriş seçilmiştir. Kirişlerin sonlu eleman modeli SAP 2000 programı kullanılarak oluşturulmuştur. Çalışmanın sonunda sayısal olarak elde edilen gerilme dağılımı ve hesaplanan kılıflama parametreleri birbiriyle karşılaştırılmıştır.

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Cite This Article

ATEŞ, Ş., ATMACA, B. (2022). The Effect of Strand Configuration on Stress Distribution and Debonding Parameters of Prestressed Girder After Detensioning. Düzce Üniversitesi Bilim ve Teknoloji Dergisi, Cilt: 6 - Sayı: 2, 401–408. https://ajindex.com/articles/494472

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References (7)

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