Effect of Post Buckling Rupture on the Deformation Capacity of Concentrate Braces

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Saji, Mohammad Reza | 2016

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 48962 (09)
University: Sharif University of Technology
Department: Civil Engineering
Advisor(s): Moghaddam, Hassan
Abstract:
In this study the behavior of steel bracings under cyclic loading, is modeled with finite element method. Analysis have shown that after local buckling in plastic mid-span position, due to the severe geometry change, the strain grows rapidly, The sharp growth of plastic strains is entitled as strain rises. Geometry change created will cause the collapse brace speeding up. In fact, the main local buckling can be used as a determinative factor in performance base design for steel braces. So the thesis has been investigated, using the parameters fracture life to quantify local buckling and fracture. Also with using the CVGM model, the fracture of the brace could be predicted. The analytical results are in good agreement with the experimental results and they have the ability to predict the overall and local buckling and fracture with acceptable accuracy
Keywords:
Steel Brace ; Local Buckling ; Strain Jump ; Debonding ; Deformation Capacity ; Concentric Bracing ; Fracture Life ; Cyclic Void Grow Model (CVGM)