Accession Number:

ADA215144

Title:

Laterally Loaded Partially Prestressed Concrete Piles

Descriptive Note:

Technical rept. FY86-FY88,

Corporate Author:

NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA

Personal Author(s):

Report Date:

1989-09-01

Pagination or Media Count:

264.0

Abstract:

This report contains findings of an extensive test program on laterally loaded, partially prestressed concrete fender piles. The study included service load range as well as post-ultimate behavior and failure modes. Partial prestressing to 600 psi was sufficient to close flexural cracks caused by cyclic load in the service load range. The best performing configuration was an 18- by 18-inch section with 20 12-inch-diameter prestress strands in a rectangular configuration confined by No. 3 ties with 3-inch pitch. The configuration, in 65-foot lengths, can be expected to perform well under cyclic load, have an ultimate energy capacity greater than 30 ft-kips, and a post- ultimate energy capacity of more than 60 ft-kips. Anchorage, shear, and bond are more than adequate and the failure mode will be in flexure. ACI equations for flexural capacity and stiffness Youngs Modulus do not adequately predict high strength. Field tests are required on the fendering systems to determine their load environment. JES

Subject Categories:

  • Structural Engineering and Building Technology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE