MSpace - DSpace at UofM >
Research Publications from University of Manitoba Researchers >
Research Publications (UofM Student, Faculty and Staff only access) >

Please use this identifier to cite or link to this item: http://hdl.handle.net/1993/2974

Title: Effects of driving forces and bending fatigue on structural performance of a novel concrete-filled fibre-reinforced-polymer tube flexural pile
Authors: Helmi, K
Fam, A
Mufti, AA
Hall, JM
Keywords: composite pile
CFFT
driving
bending
fatigue
cyclic
FRP
tension
BEHAVIOR
Issue Date: 30-Jun-2006
Citation: 0315-1468; CAN J CIVIL ENG, JUN 2006, vol. 33, no. 6, p.683 to 691.
Abstract: The effects of driving forces and high-cycle fatigue on the flexural performance of a novel pile consisting of a concrete-filled glass-fibre-reinforced polymer (GFRP) tube (CFFT) are investigated. A 367 mm diameter CFFT pile was driven and then extracted from the ground. Two 6 m segments cut from the upper and lower ends of the pile were tested to failure under monotonic bending and compared with a similar undriven CFFT pile. In addition, a 625 mm diameter CFFT and a conventional 508 mm square prestressed concrete pile of similar moment capacities, both 13.1 m long, were driven, tested in the field under lateral loads, and compared. It was found that driving forces have a marginal effect (about 5% reduction) on the flexural strength of CFFT piles. Also, CFFT piles have larger deflections than prestressed piles do. Because the GFRP tube is the sole reinforcement for the CFFT system, a comprehensive fatigue test program was conducted: coupons cut from the tube were tested under cyclic loading at various stress levels (20%-60% of ultimate) to establish the S-N curve and stiffness-degradation characteristics of the tube. A full-scale 367 mm diameter and 6 m long CFFT pile was tested under reversed cyclic bending at 60% of ultimate moment to validate the coupon test results. It is recommended that the service moment be limited to 20%-30% of ultimate moment to achieve at least 1 million cycles.
URI: http://hdl.handle.net/1993/2974
DOI: http://dx.doi.org/10.1139/l05-075
Appears in Collection(s):Research Publications (UofM Student, Faculty and Staff only access)

Files in This Item:

File Description SizeFormat
Helmi_Effects_of_driving.pdf1.06 MBAdobe PDFView/Open
View Statistics

Items in MSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! MSpace Software Copyright © 2002-2010  Duraspace - Feedback