scholarly journals Excessive Strand End Slip in Prestressed Piles

10.14359/8813 ◽  
2000 ◽  
Vol 97 (5) ◽  
Keyword(s):  
Prestressed Piles

Effects of driving forces and bending fatigue on structural performance of a novel concrete-filled fibre-reinforced-polymer tube flexural pile

2006 ◽  
Vol 33 (6) ◽  
pp. 683-691 ◽  
Author(s):  
Karim Helmi ◽  
Amir Fam ◽  
Aftab Mufti ◽  
J Michael Hall
Keyword(s):  
Prestressed Concrete ◽  
Driving Forces ◽  
Marginal Effect ◽  
Lateral Loads ◽  
Bending Fatigue ◽  
Reinforced Polymer ◽  
Composite Pile ◽  
Fibre Reinforced Polymer ◽  
Ultimate Moment ◽  
Prestressed Piles

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.Key words: composite pile, CFFT, driving, bending, fatigue, cyclic, FRP, tension.

Damage evaluation of prestressed piles to cast in place bent cap connections with Acoustic Emission

2015 ◽  
Vol 84 ◽  
pp. 184-194 ◽  
Author(s):  
Aaron Larosche ◽  
Paul Ziehl ◽  
Jese Mangual ◽  
Mohamed K. ElBatanouny
Keyword(s):  
Acoustic Emission ◽  
Damage Evaluation ◽  
Prestressed Piles

Tests of 24 in. Square Prestressed Piles Spliced With ABB Splice Units

PCI Journal ◽  
1990 ◽  
Vol 35 (2) ◽  
pp. 56-73
Author(s):  
William L. Gamble ◽  
Robert N. Bruce
Keyword(s):  
Prestressed Piles

Influence of Strand Development Length in Formation of Plastic Hinges in Prestressed Piles

PCI Journal ◽  
2001 ◽  
Vol 46 (3) ◽  
pp. 76-89
Author(s):  
Pedro F. Silva ◽  
Frieder Seible ◽  
M. J. Nigel Priestley
Keyword(s):  
Development Length ◽  
Plastic Hinges ◽  
Prestressed Piles
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