1 / 16

Seismic Performance Assessment of Flat Plate Floor Systems

CUREe-Kajima Joint Research Program: Phase IV. Seismic Performance Assessment of Flat Plate Floor Systems. John W. Wallace, Ph.D., P.E. Thomas Hyun-Koo Kang, Ph.D. Student Department of Civil and Environmental Engineering University of California, Los Angeles. Modeling and Performance Issues.

Download Presentation

Seismic Performance Assessment of Flat Plate Floor Systems

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. CUREe-Kajima Joint Research Program: Phase IV Seismic Performance Assessment of Flat Plate Floor Systems John W. Wallace, Ph.D., P.E. Thomas Hyun-Koo Kang, Ph.D. Student Department of Civil and Environmental Engineering University of California, Los Angeles

  2. Modeling and Performance Issues • Lateral stiffness and ductility of the column-slab system • Shear Reinforcement • Conventional Shear Stirrups • Shear Studs • Punching Failures • Strength and deformation capacity • Stiffness degradation in the connection region • progessive collapse prevention

  3. Column Slab Modeling Approaches • Effective Beam Width - Account for the influence of the concrete cracking (EIeffective)

  4. Column Connection Slab Modeling Approaches • Equivalent Frame Model

  5. Performance Issues - Punching (Hwang)

  6. Performance Issues - Punching (Hwang)

  7. Performance Issues - Punching Continuous bottom reinforcement to prevent collapse (Hwang)

  8. Performance Issues - Gravity Stress Low Vg/Vo High Vg/Vo Lateral Load 1% 2% 4% Drift

  9. Connection Column 1.0 0.04 Slab 0.0 Connection Modeling • Effective Beam Width with Rotational Spring

  10. Vn d Modeling Approaches • Displacement-Based Model with Shear strength degradation Drift derived from Elastic and Inelastic curvature fy fu

  11. Performance Issues - Gravity StressDisplacement-Based Model (Moehle)

  12. Prototype & Test Structure Section A-A • Prototype - Test Structure : 2 Stories, 2 × 2 bays

  13. Earthquake Simulator - Shake Table • Shake Table Test • Scale , Span-Depth Ratio • - R.C. Flat Plate : 9/20 , 1/30 • - Post-Tensioned Flat Plate : 1/3 , 1/33 (Shahrooz)

  14. Shear Reinforcement • Shear Studs (Ghali)

  15. R.C. Flat Plate -Flexural Reinforcement (Test Specimen) • Top Reinforcement • Bottom Reinforcement

  16. P.T. flat Plate -Flexural Reinforcement(Test Specimen) • Tendon Arrangement - Scale : 1/3 - Span-depth ratio : 1/33 - Tendon : 3/8 in diameter seven-wire strands (Grade 270) - Bonded Reinforcement : 3 # 3 in each direction

More Related