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Agenda – 4/13/06

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Agenda – 4/13/06

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  1. Experimental and Micromechanical Computational Study of Pile Foundations Subjected to Liquefaction-Induced Lateral Spreading - Task 1 (1g Tests)S. Thevanayagam, UBResearch Progress MeetingApril 13, 2006, 2-4 pm; UB-VTC(Follow-up meeting after 3/30/06)PI: R. Dobry, co-PI’s: A. Elgamal, S. Thevanayagam, T. Abdoun, M. ZeghalUB-NEES Lab: A. Reinhorn, M. Pitman, J. Hanley, T. Albrechcinski, Tulane: Usama El ShamyStudents: N. Ecemis, Peng Hao; RPI Students

  2. Agenda – 4/13/06 • Review of Minutes (ST, RD) • Status update on Gr. Motion & Slope – Who is doing what? • Decide a Deadline for Decision on Gr. Motion & Slope • 3D Visualization & IT Preparations (Hassan) • 3D Visualization (10 min presentation) • Interactive Website (Very preliminary discussion, what to do) • Progress on Non-Destructive Testing (MP, MZ) • Converge on Action Plan & Deadline (MP, MZ, RD) • Status Briefing (Unfinished Business from 3/30/06) • UB Test Preparations • Instrumentation & Coord (ST & TA) – Discussion on 4/11

  3. Ground Motion/Slope Discussion • Consensus on Ground motion – Gradually Increase Accc. & continue shaking until sufficient deformation • Watch for interlaminate drift limits as well as global limits • Safety Issues – Limiting Cables & Gr. Motion controls • Do not make slope too small • Need more work before deciding on slope • Calibrate Cyclic 1D & DEM – Work ongoing at RPI • Ring Correction: Box Inclination = Field Inclination / 2.2 (approx) • Ring Friction Correction is not significant • Membrane – Wrinkle (work ongoing at UB) • Perform LG-1 with GM#2 or GM#4 before FINAL decision on Slope • UB will prepare slope-possibilities for 1, 1.5 & 2 deg.

  4. Agenda – 4/13/06 • Review of Minutes (ST, RD) • Status update on Gr. Motion & Slope – Who is doing what? • Decide a Deadline for Decision on Gr. Motion & Slope • 3D Visualization & IT Preparations (Hassan) • 3D Visualization (10 min presentation) • Interactive Website (Very preliminary discussion, what to do) • Progress on Non-Destructive Testing (MP, MZ) • Converge on Action Plan & Deadline (MP, MZ, RD) • Status Briefing (Unfinished Business from 3/30/06) • UB Test Preparations • Instrumentation & Coord (ST & TA) – Discussion on 4/11

  5. Agenda – 4/13/06 • Review of Minutes (ST, RD) • Status update on Gr. Motion & Slope – Who is doing what? • Decide a Deadline for Decision on Gr. Motion & Slope • 3D Visualization & IT Preparations (Hassan) • 3D Visualization (10 min presentation) • Interactive Website (Very preliminary discussion, what to do) • Progress on Non-Destructive Testing (MP, MZ) • Converge on Action Plan & Deadline (MP, MZ, RD) • Status Briefing (Unfinished Business from 3/30/06) • UB Test Preparations • Instrumentation & Coord (ST & TA) – Discussion on 4/11

  6. Agenda – Status Briefing • UB-Schedule (Theva) • Overall Schedule • Equipment Fabrication/Assembly - Readiness • Test Schedule & Instrumentation Schedule (& Procurement) (ST) • Coord. with RPI (Instrumentation), UB & IT (ST, TA, AMR) • Ground Motion & Ground Slope (Theva) • Liquefaction Simulations: UB; RPI; Tulane (NE, MG, Usama, 5min each) • Conclusions – Gr Motion & Slope (Elgamal, Ricardo) • Non-Destructive Testing – Preliminary (Elgamal, Mourad, MP) • Test Preparations Status (Nurhan) • Laminar Box, Floor, Actuator Control – Status & Readiness (ST, AMR, MP) • Sand Construction, CPT; Instrument Procurement & Placement (ST, TA, AMR)

  7. Agenda- Prelim Discussion • Saturated Free-Field Liquefaction Tests (Theva) • Instrumentation – Plan & Adequacy (TA, ST) • Level Ground (LG-1)– Uncertainty & Decision on Ground motion (Ricardo) • Sloping Ground (SG-1)– Uncertainty & Decision & Corrections/ Box Slope; Gr. Motion (Ricardo) • Pre-test Data for FEM/DEM modelers– Additional Data Needed? (Mourad, Usama, Elgamal) • Single Pile Tests (Theva) • Instrumentation – Plan & Adequacy (TA, ST) • High-EI Pile (Test 1A)– Decision on EI – Value? (Ricardo) • Low-EI Pile (Test 1B)– Decision on EI – Value? (Ricardo))

  8. Year-1 Schedule (2005-2006)

  9. Laminar Box – Strong Floor Foot Print Strong Floor – Reserved April 1 – Oct.31, 06

  10. LAMINAR BOX - DYNAMIC ACTUATOR Controller – To be tested by Mark Pitman – 3/15-4/30/06 Reserved April 1 – Oct.31, 06 3 x 200 kips Dynamic Actuator Actuator Base Plate Bridge Deck Loading Frame

  11. Loading Frame Design Completed; Fabrication ongoing; Delivery April 17, 06

  12. Laminar Box – Strong Floor Modification Machined Base Steel Plate – UB NEES Funded PLAN VIEW

  13. Sand Construction - Hydraulic Filling Initial Slurry Pump Tests completed – Oct 05; Sand pumping/Density Control Tests – April 06 (weather)

  14. CPT/Density Testing

  15. Cone Density Testing Plastic Container = 4 ltr Metal Cone a = 6 ½ in b = 6 ½ in c = 1/2 in Base Plate 12 x 12 in

  16. Discussion between Tarek, Theva, Andrei, and Nurhan on 4-11-06 on Instrumentation

  17. Agenda- Prelim Discussion • Saturated Free-Field Liquefaction Tests (Theva) • Instrumentation – Plan & Adequacy (TA, ST) • Level Ground (LG-1)– Uncertainty & Decision on Ground motion (Ricardo) • Sloping Ground (SG-1)– Uncertainty & Decision & Corrections/ Box Slope; Gr. Motion (Ricardo) • Pre-test Data for FEM/DEM modelers– Additional Data Needed? (Mourad, Usama, Elgamal) • Single Pile Tests (Theva) • Instrumentation – Plan & Adequacy (TA, ST) • High-EI Pile (Test 1A)– Decision on EI – Value? (Ricardo) • Low-EI Pile (Test 1B)– Decision on EI – Value? (Ricardo) • 3-D Visualization & IT Preparations (Hassan, 10 minute Presentation)

  18. Instrumentation Plan LG-1 & SG-1

  19. Instrumentation Placement – LG-1 & SG-1 Plan View

  20. Soil Instrumentation Plan – LG-1 & SG-1

  21. Instrumentation: Tests LG-1 & SG-1

  22. Piezometers Initial locations & No. of piezometers - Satisfactory? How to place them at specific locations (Piezometers are planned to be tied to a weak-extensible fabric/cable tied at the base or hung from the top of the box. How to ensure accuracy of sensor locations) Allow piezometers to ‘flow’ with the soil? How will we know its position after movement? Assume – same as deformed shape of MEMS Tubing Instrumentation Discussion: Tests LG-1 & SG-1

  23. MEMS – Shape AccelArray Use MEMS instead of accelerometers in soil. (check readings with a few side-by-side accelerometers) Initial locations & No. of sensors satisfactory? – Spaced every Foot MEMS tubing tied at the bottom ‘MEMS tube’ flexible enough to experience large deformations (36mm interlaminate drift)? YES MEMS tube flows with soil? – Fixed at Bottom, flex with soil; pay attention to density of tube system (same as soil) Instrumentation Discussion: Tests LG-1 & SG-1

  24. TP – On hold for now Measure horiz stress at 1 location and vert stress @ 2 locations at bottom. Size of TP? ( No more than ring size:10’’; Different sizes are available. Ultra thin - 0.1mm) (2x2, 6x6, 12x12 inch) TP Location: Inside sand or outside the membrane? If it is inside the sand wetting and leak/sealing issues have to be discussed. Cabling from TP to DAQ? 50 ft (Connects to its PC card, the data is collected from a laptop with a serial port.) Synchronization (Global clock) Instrumentation Discussion: Tests LG-1 & SG-1

  25. Potentiometer Reference Frame: Strong Wall – One frame (E-W Direction) N-S (use accelerometers) Need to coordinate with MP 1m gap displacement range (MP, AMR, ST) Instrumentation Discussion: Tests LG-1 & SG-1

  26. Other – Cameras & Krypton To be discussed with Jason & MP Experimentation with Camera location and Krypton location to capture box response, and top of soil near center line. Instrumentation Discussion Item #1: Tests LG-1 & SG-1

  27. Membrane Membrane Stiffness Membrane Tensile strength Membrane Extension (failure) = 520% Wrinkling to reduce tension and rupture Membrane resistance to lateral deformation ranges (lb/mm extension). Instrumentation Discussion : Tests LG-1 & SG-1

  28. Equipment & Instruments – Plan

  29. Agenda- Prelim Discussion • Saturated Free-Field Liquefaction Tests (Theva) • Instrumentation – Plan & Adequacy (TA, ST) • Level Ground (LG-1)– Uncertainty & Decision on Ground motion (Ricardo) • Sloping Ground (SG-1)– Uncertainty & Decision & Corrections/ Box Slope; Gr. Motion (Ricardo) • Pre-test Data for FEM/DEM modelers– Additional Data Needed? (Mourad, Usama, Elgamal) • Single Pile Tests (Theva) • Instrumentation – Plan & Adequacy (TA, ST) • High-EI Pile (Test 1A)– Decision on EI – Value? (Ricardo) • Low-EI Pile (Test 1B)– Decision on EI – Value? (Ricardo) • 3-D Visualization & IT Preparations (Hassan, 10 minute Presentation)

  30. Pile Preparation & Plans

  31. PILE

  32. Instrumentation Plan Single Pile

  33. Instrumentation Placement –Test 1A & 1B Plan View

  34. Instrumentation – Test 1A & 1B Instrument cables sealing needed?

  35. Instrumentation: Single Pile (Test 1A & 1B)

  36. Instrumentation – Test 1A & 1B (Single Pile)

  37. Piezometers 1. Initial locations & No. of piezometers - Satisfactory? Piezometers are planned to be tied to the weak-extensible cable tied at the base or hung from the top of the box. How to ensure accuracy of sensor locations. Also, Piezometers tied to Pile. 2. Do we want the piezometers to stay at fixed ‘initial’ coordinates or ‘flow’ with the soil (or Pile)? 3. How will we know its position after movement? Instrumentation Discussion: Single Pile Tests

  38. Strain Gages Locations & No. of strain gages - Satisfactory? Installed on pile outer surface; cabling from inside the pile through holes on pile (sealed); How to water-seal cables (if outside pile). Instrumentation Discussion: Single Pile Tests

  39. MEMS – Shape AccelArray Use MEMS instead of accelerometers in soil. Initial locations & No. of sensors satisfactory? MEMS tubing tied at the bottom of box? ‘MEMS tube’ flexible enough to experience large deformations (36mm interlaminate drift)? MEMS tube flows with soil? Same Questions for MEMS tube tied to pile Instrumentation Discussion: Single Pile

  40. TP Measure horiz stress at 1 location and vert stress @ 2 locations at bottom. Size of TP? ( No more than ring size:10’’; Different sizes are available. Ultra thin - 0.1mm) TP Location: Inside sand or outside the membrane? If it is inside the sand wetting and leak/sealing issues have to be discussed. Cabling from TP to DAQ? (Connects to its PC card, the data is collected from a laptop with a serial port.) TP wrapped around Pile? How…details? Instrumentation Discussion: Single Pile

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