Serkan BEKİROĞLU, Yusuf AYVAZ

10167

Doğrusal Olmayan Rüzgâr Etkisindeki Dairesel Kesitlerde Geliştirilmiş Sonlu Elemanlar Uygulaması

Bu çalışmada p-yöntemine dayalı Sonlu Elemanlar Yöntemi (pSEY) ve Karma Fonksiyon Yöntemi ile zenginleştirilmiş bir sonlu eleman programı hazırlanmıştır. Program, kartezyen eksen takımında tanımlı doğrusal yerdeğiştirmelere ile doğrusal olmayan sürekli veya süreksiz yüklemelerin dikkate alınabildiği, eğrisel kenar ve/veya yüzeyli olabilen dörtgen prizma şeklindeki üç boyutlu bir sonlu elemana sahiptir. Program ile dairesel kesitli bir sanayi bacasının TS 498'e göre doğrusal olmayan ve düzgün rüzgâr yüklemeleri; pr EN 1991-1-4'e göre sadece doğrusal olmayan rüzgâr yüklemesi altında statik analizleri yapılmıştır. Sonuç olarak geliştirilen programın güvenilir sonuçlar verdiği ve doğrusal olmayan yük modellemesinin yapılabilirliği sayesinde ilgili standartların ne kadar farklı sonuçlar verebildiği görülmüştür
Anahtar Kelimeler:

p-yöntemi, sonlu elemanlar, karma fonksiyon yöntemi, eğrisel yüzeyli sonlu eleman, doğrusal olmayan yükleme, rüzgâr yüklemesi

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Implementation of Improved Finite Elements Over Circular Cross-Section Subjected to Effect of Non-Uniform Wind In this study, a finite element program based on p-version finite element method (pFEM) and augmented by blending function method is coded. The program has a solid 3 dimensional finite element defined in cartesian coordinates, by which application of continuous or discontinuous nonlinear loads are taken into account and exact representation of curved edge and/or surface boundary is performed. With the aid of the coded program, a series of static analyses under defined wind loads for uniform and non-uniform loadings according to TS 498 and non-uniform loading according to pr EN 1991-1-4 are carried out on an industrial chimney with a circular cross-section. It is concluded that the coded program gives reliable results. Due to the capability of modeling of non-uniform loadings it is observed that the standards may lead to vastly different results
Keywords:

p-version finite element method (pFEM), finite elements, blending function method, finite element having curved surfaces, non-uniform loading, wind loading,

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Teknik Dergi-Cover
  • ISSN: 1300-3453
  • Yayın Aralığı: Yılda 6 Sayı
  • Yayıncı: TMMOB İnşaat Mühendisleri Odası
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