CENTRIFUGE MODELING OF SPREAD-BASE INTEGRAL BRIDGE ABUTMENTS

Integral bridge abutments are attracting increasing interest in many countries around the world. Maintenance costs incurred by damage from assorted agents to bearings and expansion joints can be greatly reduced. However, adverse temperature effects on the performance of these bridges are of concern to many engineers. This paper describes some centrifuge model tests on, and numerical modeling of, spread-base integral bridge abutments subjected to cyclic deformation, which simulated the expansion and contraction of the bridge deck as effective temperature of the bridge deck changed. Significant settlements were observed behind the abutment resulting from soil densification, "strain" ratchetting, horizontal sliding, and the rocking motion of the abutments. The measured lateral earth pressure increased with the amplitude of the passive displacements and the number of cycles, but at a decreasing rate. Under the serviceability and ultimate limit conditions, the measured lateral earth pressure was less than the K (sub p) value, although the measured value was significantly higher than K (sub 0). A triangular failure wedge developed behind the abutment wall under the ultimate limit conditions.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/3519342
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Ng, CWW
  • SPRINGMAN, S M
  • Norrish, ARM
• Publication Date: 1998-5

Language

• English

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 376-388
• Serial:
  • Journal of Geotechnical and Geoenvironmental Engineering
  • Volume: 124
  • Issue Number: 5
  • Publisher: American Society of Civil Engineers
  • ISSN: 1090-0241
  • Serial URL: http://ojps.aip.org/gto

Subject/Index Terms

• TRT Terms: Bridge abutments; Bridge decks; Centrifuges; Contraction; Deformation; Dislocation (Geology); Earth pressure; Expansion; Failure; Mathematical models; Repeated loads; Settlement (Structures); Soil densification; Soil mechanics; Soil structure interaction; Strain (Mechanics); Temperature; Weather conditions
• Uncontrolled Terms: Earth pressure at rest; Lateral pressure; Sliding
• Old TRIS Terms: Portal frame bridges; Soil behavior
• Subject Areas: Bridges and other structures; Design; Geotechnology; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00749284
• Record Type: Publication
• Contract Numbers: UST 541/94E, F92TL05
• Files: TRIS, ATRI
• Created Date: May 30 1998 12:00AM