APPLICATION OF PRECAST, PRESTRESSED CONCRETE PILES IN INTEGRAL ABUTMENT BRIDGES

In jointless integral abutment bridge superstructures, thermally induced movements must be absorbed by the abutments, which in most cases are supported on piles. Most states in the United States use steel piles in their integral abutment bridges. Research was undertaken to compare the flexibility of steel and concrete piles to determine whether concrete piles may be used in integral abutment bridges and, if not, to modify the pile abutment joint detail currently used with steel piles for possible use with concrete piles. Load-deflection tests on one steel and two concrete piles were conducted to evaluate and compare their stiffnesses. The computer program LPILE was used to analyze both concrete and steel piles in various types of soil. The results of the analysis and tests showed that concrete piles have limited flexibility for lateral loads with current pile abutment details; therefore, they can be used only in short span integral abutment bridges. For concrete piles, a new pile abutment joint was investigated. The joint consists of a neoprene bearing pad with a Teflon layer. It allows for controlled movement or rotation of the pile relative to the abutment, or both. Laboratory tests were conducted to study the behavior of the proposed joint under axial and lateral loads. The test results showed that the proposed joint would allow the use of concrete piles in integral abutment bridges of lengths comparable to those with steel piles.

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 146-157
  • Monograph Title: FOURTH INTERNATIONAL BRIDGE ENGINEERING CONFERENCE, SAN FRANCISCO, CALIFORNIA, AUGUST 28-30, 1995. CONFERENCE PROCEEDINGS, 2 VOLUMES
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00711720
  • Record Type: Publication
  • ISBN: 0309061091
  • Files: TRIS, TRB
  • Created Date: Sep 6 1995 12:00AM