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SEISMIC RESPONSE OF LOW ASPECT RATIO REINFORCED CONCRETE Shear WALLS

SEISMIC RESPONSE OF LOW ASPECT RATIO REINFORCED CONCRETE Shear WALLS. Bismarck Luna Ph.D. Candidate Civil, Structural and Environmental Engineering, University at Buffalo. Acknowledgement. National Science Foundation Dr . Joy M. Pauschke , NEESR Program Director Project team members

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SEISMIC RESPONSE OF LOW ASPECT RATIO REINFORCED CONCRETE Shear WALLS

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  1. SEISMIC RESPONSE OF LOW ASPECT RATIO REINFORCED CONCRETE Shear WALLS Bismarck Luna Ph.D. Candidate Civil, Structural and Environmental Engineering, University at Buffalo

  2. Acknowledgement • National Science Foundation • Dr. Joy M. Pauschke, NEESR Program Director • Project team members • University at Buffalo • Jonathan Rivera, Joshua Rocks, Dr. CaglarGoksu (ITU), Emma Lejeune (Cornell REU), Prof. Andrew Whittaker (PI) • University of California, Berkeley • Catherine Whyte, Prof. BozidarStojadinovic (Co-PI) • University of Washington • Joshua Pugh, Anna Birely, Prof. Laura Lowes (Co-PI) • California Polytechnic State University, San Luis Obispo • Prof. Abraham Lynn (Co-PI) • LPCiminelli, Inc. • MCEER (http://mceer.buffalo.edu/) • 2 Quake Summit 2012, Boston, Massachusetts

  3. Outline of presentation • Goals • Specimen details • Test setup • Instrumentation • Global response • Peak shear strength • Lateral stiffness • Strength degradation • Future work • 3 Quake Summit 2012, Boston, Massachusetts

  4. Goals • Acquire robust information on the seismic behavior of low aspect ratio rectangular RC shear walls • Provide simulation tools as needed • Revise predictive equations for shear strength and stiffness • Understand force transfer in walls at different levels of drift • Develop macro-level hysteretic models • Update fragility functions and damage states • Response modification factors • 4 Quake Summit 2012, Boston, Massachusetts

  5. Specimen details SW9 SW12 • 5 Quake Summit 2012, Boston, Massachusetts

  6. Test setup Test fixture setup Specimen SW2 • 6 Quake Summit 2012, Boston, Massachusetts

  7. Instrumentation • In-plane string potentiometers and temposonics • Out-of-plane string potentiometers • Krypton system • Strain gages • 7 Quake Summit 2012, Boston, Massachusetts

  8. Instrumentation Gigapan system • 8 Quake Summit 2012, Boston, Massachusetts

  9. Global response SW4 SW3 SW7 SW6 • 9 Quake Summit 2012, Boston, Massachusetts

  10. Peak shear strength SW3 • 10 Quake Summit 2012, Boston, Massachusetts

  11. Peak shear strength • 11 Quake Summit 2012, Boston, Massachusetts

  12. Lateral stiffness SW3 • 12

  13. Lateral stiffness SW3 • 13

  14. Strength degradation SW8 • 14 Quake Summit 2012, Boston, Massachusetts

  15. Future work • Testing of the remaining two specimens • Data reduction • Processing Krypton data • Analysis of cracks and strain gage data • Processing Gigapan images • 15 Quake Summit 2012, Boston, Massachusetts

  16. Thank You bismarck@buffalo.edu Quake Summit 2012, Boston, Massachusetts

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