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Analytical Study of Column Base Plates under Earthquake Loading

Mollazeinal, Mohammad Hossein | 2009

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 39393 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Maleki, Shervin
  7. Abstract:
  8. One of the most important connections in a structure is the column base plate connection. In structures subjected to earthquake loading, this connection is usually where a plastic hinge can develop and therefore is of utmost importance. In this paper, behavior of base plates under monotonic and cyclic loading is investigated. The failure modes, that are one of the fundamental targets in this study include base plate yielding, anchor bolt yielding and also failure arising due to crushing of concrete. A parametric study is conducted using nonlinear finite element analysis. Parametes such as plate thickness, anchor bolt size and location and concrete strength are considered. The desired behavior is a ductile behavior that can undergo excessive deformation. This is also desirable under earthquake loading. The results indicate that connections with medium base plate thickness possess this condition and have suitable ductility and sufficient resistance in cyclic loading. Also results of thick base plate indicate that the connection in cyclic loading can have brittle failure modes such as concrete crushing in compression and also anchor bolt yielding in tension. Also comparison between design codes and other proposed methods are made and finally a comprehensive method for design of base plate connection in different cases is proposed
  9. Keywords:
  10. Seismic Loading ; ANSYS Software ; Ductility ; Finite Element Analysis ; Seismic Design Codes ; Failure Modes ; Base Plate

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