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Performance Based Optimal Seismic Design of Steel Plate Shear Walls by Bendurance Time Method

Ghaderifard, Morteza | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 43511 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Estekanchi, Homayoon
  7. Abstract:
  8. The AISC Seismic Design Provisions include capacity design requirements for steel plate shear walls since 2005. This system consist of thin web plates that infill frame panels with steel beams as horizontal boundary elements (HBEs), and columns as vertical boundary elements (VBEs). The thin unstiffened web plates are expected to buckle in shear at low load levels and develop tension field action, providing ductility and energy dissipation through tension yielding of the web plate. HBEs are designed for stiffness and strength requirements and are expected to anchor the tension field formation in the web plates. VBEs are designed for yielding of web plates and plastic hinge formation at the ends of the HBEs.In this article the behavior of code designed SPSWs is assessed. A series of walls subjected to different heights and panel aspect ratios are designed which their behavior is evaluated using nonlinear static analysis, nonlinear response history analysis and endurance time method for different Hazard levels. Then models are optimized using Endurance Time method.It is shown that based on current code requirements, designs satisfy maximum interstory drift requirements considering design level earthquakes and have maximum interstory drifts of less than 5% for maximum considered earthquakes for nonlinear time history analysis and interstory drifts of less than 5% in target displacement of nonlinear static analysis. Furthermore, it is shown that code designed models satisfy performance level requirements in target time of endurance time analysis. Suitable panel aspect ratio was obtained for various models with respect to different heights. Steel wall thicknesses are then optimized considering several hazard levels simultaneously by Endurance Time procedure and the results are compared with standard design practice
  9. Keywords:
  10. Steel Plate Shear Wall (SPSW) ; Endurance Time Method ; Seismic Design ; Interstory Drift ; Drift

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