Eğilme etkisi altındaki soğukta şekil verilmiş çelik konik çatı kirişlerinin sonlu elemanlar modellemesine etki eden parametrelerin incelenmesi

Öz

Bu çalışmada soğukta şekil verilmiş çelik kiriş elemanların doğrusal olmayan nümerik modellemesinin deneysel veriler ile doğrulanması amaçlanmıştır. C harfi formunda kesiti olan kirişlerden oluşturulan ve konik çatıya benzetilen deney elemanı test edilmiştir. Nümerik çalışmada ise deney elemanları farklı ağ tipleri, boyutları ve büyütme katsayıları kullanılarak modellenmiştir. Ayrıca, global ve lokal geometrik kusurlar gibi değişkenlerin analize etkisi değerlendirilmiş ve model doğrulanmıştır. Belirlenen modelin analizlerinden elde edilen sonuçlar, deneyde elde edilen sonuçlar ile karşılaştırılmıştır. Analitik modelin doğrulanmasında global kusurların tek başına yeterli olmadığı, lokal etkilerin de tanımlanması gerektiği sonucuna ulaşılmıştır.

Anahtar Kelimeler

• Soğukta şekil verilmiş çelik
• Eğilme elemanı
• Sonlu elemanlar yöntemi
• Geometrik kusur

Investigation of parameters affecting finite element modeling of cold formed steel conical roof beams under bending

Öz

This study aims to verify the nonlinear numerical modeling of cold-formed steel beam members with experimental data. An experimental member formed by beams with a C-section and modeled as a conical roof was tested. In the numerical study, the experimental elements were modeled using different mesh types, sizes and amplification factors. In addition, the effect of parameters such as global and local geometric imperfections on the analysis is evaluated and the model is validated. The results obtained from the specified model analysis are compared with those obtained in the experiment. It is concluded that global imperfections alone are insufficient to validate the analytical model and local effects should also be identified.

Anahtar Kelimeler

• Cold formed steel
• Bending member
• Finite element method
• Geometric imperfection

Kaynakça

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