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A Parametric Study on Application and Analysis of Beam to Column "Reversed Channel" Connection in Tubular Systems

Kokabi, Sina | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 45039 (53)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Mofid, Massoud
  7. Abstract:
  8. Today steel tubular systems are used more than before, especially in recent years. A difficulty with this type of systems is making beam to column connections using bolts due to no access to holes of bolts from the inside of tube or hollow circular column. Reverse channel connection is devised and introduced to prevail this problem. Access to holes in this connection is from the inside of channel. In this connection, the web of the channel is connected to steel beam using bolts and the two legs of channel is welded to face of tube column.
    This type of connection does include some innovations; not too many researchers work on different versions of this connection. This thesis provides an extensive parametric study on “Moment-Rotation”, as well as stiffness and ultimate moment carried by this type of connection, using finite element method. On the other hand, using an analytical approach, the effect of each component on behavior of connection will be considered, separately. Also connection will be classified to rigid, semi-rigid or pinned connection according to different codes, such as AISC. Finite element analysis will be performed through ABAQUS software; and results shall be verified through comparison with some experimental data by L. Xue in School of mechanical, aerospace and civil engineering in university of Manchester. Moment-Rotation diagrams will be calculated under monotonic loading as L. Xue used in his paper. Materials used in this thesis are non-linear material for steels, bolts and welds. In addition, the analytical model is prepared and implemented, using component method to evaluate the initial stiffness of connection
  9. Keywords:
  10. Beam Wall Connection ; Tubular Column ; Reverse Channel Connection ; Moment-Rotation Curve ; Analytical Approach ; Finite Element Method ; Initial Stiffness

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  • Author’s Declaration
  • Abstract
  • Acknowledgements
  • Dedication
  • Table of Contents
  • List of Figures
  • List of Tables
  • List of symbols
  • Chapter 1
  • Introduction
    • 1-1- Introduction
    • 1-2- Connections Classification
      • 1-2-1- AISC Classification:
        • 1-2-1-1- Connection stiffness
        • 1-2-1-2- Connection Strength
        • 1-2-1-3- Connection Ductility
      • 1-2-2- EuroCode Classification:
        • 1-2-2-1- Classification by Stiffness
        • 1-2-2-2- Classification by Strength
    • 1-3- Objective of Research
  • Chapter 2
  • Literature Review
    • 2-1- Researches on various beam to column connections in tubular frames
      • 2-1-1- Fin plate Connection:
      • 2-1-2- Top and seat angle with or without web angle Connection:
      • 2-1-3- T-Stub Connection:
      • 2-1-4- End plate Connection:
      • 2-1-5- Web cleat Connection:
    • 2-2- Previous Researches on Reverse Channel Connection
    • 2-3- Summary
  • Chapter 3
  • Finite Element Modeling
    • 3-1- Overview
    • 3-2- Model Geometry
    • 3-3- Materials
      • 3-3-1 Steel Material
      • 3-3-2 Bolt Material
      • 3-3-3 Weld Material
    • 3-4- Computer Modeling
    • 3-4- Meshing
    • 3-4- Mesh Sensitivity Study
    • 3-5- Contact and Interaction between parts
    • 3-6- Parametric Analysis
  • Chapter 4
  • Results and Verifying
    • 4-1- Introduction
    • 4-2- Effect of End Plate Thickness
    • 4-3- Effect of Channel Flange Thickness
    • 4-4- Effect of Channel Web Thickness
    • 4-5- Effect of Channel Flange Width
    • 4-6- Effect of Channel Web Width
    • 4-7- Effect of Beam Section
    • 4-8- Verify Results
    • 4-9- Stresses and Displacements Contours
  • Chapter 5
  • Analytical Approach on Initial Stiffness of Connection
    • 5-1- Introduction
    • 5-2- Initial Stiffness Evaluation
    • 5-3- Compare Analytical Model vs. FEM and experimental results
  • Chapter 6
  • Conclusion and Recommendations on Behavior of Connection
    • 6-1- Conclusion
    • 6-2- Recommendation on Improving Behavior of Connection
    • 6-3- Recommendation for Further Studies
  • References
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