1 / 44

Introduction a. UB 1-g Tests b. Schedule Laminar Box Strong Floor-Shaking

colman
Download Presentation

Introduction a. UB 1-g Tests b. Schedule Laminar Box Strong Floor-Shaking

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. Experimental and Micromechanical Computational Study of Pile Foundations Subjected to Liquefaction-Induced Lateral SpreadingS. Thevanayagam, UBResearch Kickoff MeetingNov. 19, 2005, RPIPI – R. Dobry, co-PI’s: A. Elgamal, S. Thevanayagam, T. Abdoun, M. ZeghalAcknowledgements: Kanagalingam, N. Ecemis

  2. Outline • Introduction a. UB 1-g Tests b. Schedule • Laminar Box Strong Floor-Shaking a. Preparations, Progress & Schedule b. Strong Floor, Actuators, Shaking, Logistics, Safety • Sand Construction – Plans & progress a. Sand Hydraulic Filling – Preparations and progress b. Dry runs – Preparations & fine tuning equipment c. Sand CPT Testing – plans • Year-1 Test Plans & Schedule a. Tests & Instrumentation – preliminary plans b. Coordination & integration b. Data Acquisition & IT (preliminary) • Equipment & Instrumentation - Progress Summary

  3. Pile (Test 1A: High EI pile, Test 1B: Low EI pile) F#55 Sand, Dr~45% 2-D Laminar Box (24 Laminates) 6.2 m Ball Bearings Shaking Frame on Strong Floor a=2 or 3 deg. SECTIONAL VIEW 3.35 m 2.75 m 5.0 m 5.6 m PLAN Task 1: Single Pile (Tests 1 & 2)(shaking in perpendicular directions)

  4. Pile Cap Pile F#55 Sand, Dr~45% 2-D Laminar Box (24 Laminates) 6.2 m Ball Bearings Shaking Frame on Strong Floor a=2 or 3 deg. SECTIONAL VIEW 3.35 m 2.75 m 5.0 m 5.6 m PLAN Task 1: Group Pile (Tests 3 and 4)(shaking in perpendicular directions) • Task 1 Total Tests: 4 • Yr-1: Test #1 • Yr-2: Tests #2 and 3 • Yr-3: Test #4

  5. Year-1 Schedule (2005-2006)

  6. Year-1 Schedule (2005-2006)

  7. Modular Multilayer-Laminate-Bearing Design; 5.0x2.75x6.2m (85 cubic meter maximum capacity) Simulate 2-D Ground Response for Soil-Foundation-Structure Interaction Studies at or Near Full Scale 1-g Geotechnical Studies to Compliment Centrifuge 2-D Large Scale Geotechnical Laminar Box - Details

  8. Laminar Box Details

  9. 2-D Large Scale Geotechnical Laminar Box

  10. Bearing & I-Beam Assembly

  11. Interlaminate Bearings

  12. Reaction Wall Strong Floor Fast Actuator (100-200 ton) 2D-Bearings 2-D Laminar Box – Strong Floor - Shaking

  13. Dynamic Actuators& Controllers – For Laminar Box Shaking • 3 x 100 tons Dynamic Actuators (0-100Hz, 1.25 m/sec, 800 gpm valves)

  14. Large Dynamic and Static Actuatorsand Controllers • 3 x 100 tons Dynamic Actuators (0-100Hz) • 2 x 200 tons Static Actuators • Flex-Test Controllers and Software • STS Controller (MTS469) – Custom Made

  15. Reaction Wall Strong Floor Fast Actuator (100-200 ton) 2D-Bearings 2-D Large Scale Geotechnical Laminar Box

  16. Laminar Box – Strong Floor Shaking Setup

  17. Laminar Box – Strong Floor Modification PLAN VIEW

  18. Strong Floor – Bearing Support

  19. Loading Frame

  20. Sand Construction - Hydraulic Filling

  21. LAB Reaction Wall Diffuser Slurry Pump (5 HP, 3f, 208V, 14.5 A) Laminar Box (LB) 3”/ 350 ft Hose Water Sand Slurry Ottawa F-55 Sand (150 T) Water Strong Floor Circulating Water Pump Sand Container Laminar Box Sand Placement Placement rate / Density – To be worked out Target Density: ~ 30% - 50% Density measurements during placement & CPT measurements after placement

  22. Hydraulic Placement Methods

  23. Field Hydraulic Fill Placement Methods & CPT Results Low Speed + Compaction High Speed Bottom Dump

  24. Hydraulic Fill – Field CPT Data(Mitchell et al.) Better Control Possible in the Lab. Environment; Includes plans for development of placement controls to achieve desired density ranges

  25. Hydraulic Filling – Preliminary Pump Tests - completed Slurry Pump (5 HP, 3f, 208V, 14.5 A) Sand Slurry Water Ottawa F-55 Sand Water Container-B Circulating Water Pump Container-A Placement rate & Density Controls – To be worked out Target Density: ~ 30% - 50% Density measurements during placement & CPT measurements after placement

  26. LAB Reaction Wall Diffuser Slurry Pump (5 HP, 3f, 208V, 14.5 A) Laminar Box (LB) 3”/ 350 ft Hose Water Sand Slurry Ottawa F-55 Sand (150 T) Water Strong Floor Circulating Water Pump Sand Container Laminar Box Sand Placement Preparation Tests Placement rate / Density – To be worked out Target Density: ~ 30% - 50% Density measurements during placement & CPT measurements after placement

  27. CPT Testing Additional Sampling & Density measurements 1. Tip 2. Sleeve 3. Pore pressure Cost (TBE) • 100% Soil Saturation – Hydraulic Filling: For Fully Saturated Tests. • Drain water to obtain “Dry” Sand – For Unsaturated or dry Tests

  28. Preparatory • Dry Runs & Preliminary Equipment Tests • Free-Field Liquefaction • Level Ground (LG-1) – Harmonic progressive amplitude increase (May 06) • Sloping Ground (SG-1) - Harmonic progressive amplitude increase (July 06) • Coord Pre-test data for num. modelers – 2mo before tests for Class A prediction & post-test model calibration (March 06 & May 06) • Single Pile • High-EI Pile (Test 1A) – Harmonic 1-2Hz, 0.2-0.3g (Aug. 06) • Low-EI Pile (Test 1B) – Harmonic 1-2Hz, 0.2-0.3g (Oct. 06) • Coordination w/ Centrifuge Tests & IT Year-1 Test Plans (2005-06)

  29. Instrumentation – Schematic Plan view Reaction Wall Actuator Potentiometer MEMS Shape Cable Accelerometer Piezometer Strain Gauge Schematic Diagram – Plan View

  30. Instrumentation: Free Field Liquefaction Tests LG-1 & SG-1

  31. Instrumentation: Free Field Liquefaction Tests LG-1 & SG-1

  32. Pile (Test 1A: High EI pile, Test 1B: Low EI pile) F#55 Sand, Dr~45% 2-D Laminar Box (24 Laminates) 6.2 m Ball Bearings Shaking Frame on Strong Floor a=2 or 3 deg. SECTIONAL VIEW 3.35 m 2.75 m 5.0 m 5.6 m PLAN Single Pile (Tests 1A & 1B) Boundary “Ring – Corrections” To be worked out

  33. Soil-Pile Instrumentation MEMS Shape Cable Potentiometer Accelerometer Piezometer Strain Gauge Schematic Diagram- Sectional Views

  34. Soil-Pile Instrumentation Reaction Wall Actuator Potentiometer MEMS Shape Cable Accelerometer Piezometer Strain Gauge Schematic Diagram – Plan View

  35. KRYPTON Soil-Pile Instrumentation

  36. Instrumentation: Single Pile

  37. Instrumentation: Single Pile

  38. Pile Cap Pile F#55 Sand, Dr~45% 2-D Laminar Box (24 Laminates) 6.2 m Ball Bearings Shaking Frame on Strong Floor a=2 or 3 deg. SECTIONAL VIEW 3.35 m 2.75 m 5.0 m 5.6 m PLAN Group Pile (Test 3; Yr-2)

  39. Instrumentation: 2x2 Group

  40. Instrumentation: 2x2 Group

  41. Instrumentation Summary Soil Sensors • 34 Accelerometers – Rings • 28 Accelerometers – Soil • 54 Piezometers – Soil • 40 Potentiometers – Rings • 3 MEMS Shape Cables – Soil • Krypton Imager – Field of View: Top Surface and Top 2m Rings Pile Sensors • Many Strain gauges • 2 MEMS Shape Cables • Krypton Imager - Field of View: Pile Cap Others • Instrument Mounting Frame - Available • Pacific Data Acquisition System (285 Channels; 256 available) • Krypton (30) – 50 Available • MEMS (144) - ?? Available • Time stamp, Data Synchronization & IT – Need to develop (Jason)

  42. Task 1 Progress Summary • Introduction a. UB 1-g Tests – Task 1 b. Schedule • Laminar Box Strong Floor-Shaking – Laminar box Completed; Shaking Design completed; Strong floor-box interface Fabrication & Testing planned a. Preparations, Progress & Schedule b. Strong Floor, Actuators, Shaking, Logistics, Safety • Sand Construction – Plans & progress – Pump tests completed a. Sand Hydraulic Filling & Density Control – Preparations and progress b. Dry runs – Preparations & fine tuning equipment c. Sand CPT Testing – plans • Year-1 Test Plans & Schedule – NEES Lab Scheduled (Typ 10wks/test) a. Tests & Instrumentation – prelim. plans & Budget completed (w/ AMR) b. Coordination & integration (with Other Tasks) b. Data Acquisition & IT (preliminary) • Equipment & Instrumentation - Progress Summary

  43. Equipment & Instruments– Plan & Progress..

  44. Open for Discussion by All Researchers

More Related