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) : Warren, G


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a215144.pdf


Report Date : Sep 1989


Pagination or Media Count : 264


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 1/2-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 (Young's Modulus) do not adequately predict high strength. Field tests are required on the fendering systems to determine their load environment. (JES)


Descriptors :   *PILE STRUCTURES , PRESTRESSED CONCRETE , LOADS(FORCES) , STIFFNESS , CRACKS , ENERGY , FIELD TESTS , FAILURE , CYCLES , HIGH STRENGTH , CONFIGURATIONS , RECTANGULAR BODIES , EQUATIONS , FLEXURAL PROPERTIES , ENVIRONMENTS , CAPACITY(QUANTITY)


Subject Categories : Structural Engineering and Building Technology


Distribution Statement : APPROVED FOR PUBLIC RELEASE