DYNAMIC DETERMINATION OF PILE LOAD-BEARING CAPACITY

CONSIDERATION HAS BEEN GIVEN TO THE DEVELOPMENT OF AN ACCURATE METHOD FOR OBTAINING THE LOAD-BEARING CAPACITY OF A PILE BASED ON DYNAMIC PILE DRIVING INFORMATION. BASED ON THE NEGLECT OF INERTIAL FORCES AND THE ASSUMPTION THAT THE PILE IS A RIGID BODY, THE BEARING CAPACITY IS APPROXIMATELY EQUAL TO THE CENTROID (ALONG THE FORCE AXIS) OF THE INTERACTION FORCE-TIME CURVE. THE INTERACTION FORCE IS OBTAINED BY THE USE OF A LOAD CELL SITUATED BETWEEN THE HAMMER AND PILE TOP. A MORE ACCURATE DETERMINATION OF LOAD-BEARING CAPACITY MAY BE OBTAINED BY INCLUDING THE INERTIAL EFFECT IN THE ANALYSIS. THE AGREEMENT BETWEEN THE DYNAMIC PREDICTIONS AND THE STATIC LOAD-TEST VALUES FOR 8 FULL-SCALE PILES IS QUITE GOOD. ON THE BASIS OF FORCE-DISPLACEMENT CURVES DERIVED FROM FORCE-TIME AND DISPLACEMENT-TIME TRACES, APPROXIMATELY 95 PERCENT OF THE RATED ENERGY OUTPUT OF THE HAMMER IS TRANSFERRED TO THE SOIL-PILE SYSTEM. FINALLY, INITIAL CONSIDERATION IS GIVEN TO THE MODEL SIMULATIONS OF A HAMMER- PILE-SOIL SYSTEM ON AN ANALOG COMPUTER. /AUTHOR/

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/hrr/1971/354/354-007.pdf
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309019672
• Supplemental Notes:
  • Sponsored by Committee on Construction of Bridges and Structures and presented at the 50th Annual Meeting. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Gnirk, P F
  • Krause, K E
  • Bump, V L
  • Anderson, K E
• Conference:
  • 50th Annual Meeting of the Highway Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1971-1-18 to 1971-1-22
• Publication Date: 1971

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 67-79
• Monograph Title: Bridges and Bridge Foundations
• Serial:
  • Highway Research Record
  • Issue Number: 354
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Analog computers; Dynamic tests; Forecasting; Inertia (Mechanics); Mathematical models; Pile driving; Static loads
• Uncontrolled Terms: Models
• Old TRIS Terms: Pile bearing capacities; Static loading
• Subject Areas: Construction; Highways;

Filing Info

• Accession Number: 00215443
• Record Type: Publication
• ISBN: 0309019672
• Files: TRIS, TRB
• Created Date: Dec 13 1971 12:00AM