FRP-Strengthened RC Piles. I: Piles under Static Lateral Loads

Madasamy, Murugan; Muthukkumaran, Kasinathan; Natarajan, C.

doi:10.1061/(asce)cf.1943-5509.0000990

Cited by 12 publications

(5 citation statements)

References 14 publications

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“…Lignola et al (2017) tested the performance of RC hollow columns with carbon fibre reinforced polymer (CFRP) wraps subjected to combined axial load and bending, and found that the FRP jacketing increased the ultimate load and ductility of hollow columns. Moreover, Murugan et al (2017) pointed out that both GFRP and CFRP confined piles showed higher lateral bearing capacity than unconfined piles, and piles with fibres oriented along the length had higher strength than along the circumference.…”

Section: Introduction and Research Significancementioning

confidence: 99%

Flexural performance of pretensioned spun concrete piles reinforced with steel strands

Zhang

Gong

et al. 2022

Magazine of Concrete Research

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The application of pretensioned spun high-strength concrete (PHC) piles in high intensity seismic areas has so far been limited by insufficient horizontal load resistance and poor deformation capacity. A new type of pretensioned spun concrete pile with high strength and high elongation steel strands instead of steel bars has been developed. This paper presents the flexural performance evaluation of the new centrifugal spun concrete pile with steel strands (hereafter referred to as PSC pile). An experimental study is presented first, including the bending tests on six full-scale pile test specimens with three different pile diameters. The flexural performances of PHC and PSC piles are comparatively assessed in terms of crack resistance, ultimate bearing capacity, deformation capacity and failure mode. The results show that the new PSC piles have similar crack resistance, but higher ultimate bearing capacity and better deformation capacity under a flexural condition. Comparing to PHC piles which exhibit a brittle bending failure due to the rupture of prestressing steel bars, PSC piles demonstrate a ductile bending failure with a more gradual crushing of concrete in the compression zone. Following the experimental study, a theoretical model is developed to evaluate the flexural strength of the piles, and a simplified calculation equation for ultimate bending moment is proposed. Finally, a finite element model is also established to simulate the flexural performance of the piles and the modelling results are found to be in good agreement with the experimental results.

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Section: Introduction and Research Significancementioning

confidence: 99%

Flexural performance of pretensioned spun concrete piles reinforced with steel strands

Zhang

Gong

et al. 2022

Magazine of Concrete Research

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“…Through theoretical analysis and experimental study, Lignola et al [8,9] found that the fiber reinforced polymer (FRP) jacketing could significantly enhance the flexural strength and ductility of hollow RC members. Murugan et al [10] also carried out an experimental study on RC piles wrapped with carbon and glass fiber reinforced polymers (CFRP and GFRP) under lateral loads, and pointed out that the CFRP-and GFRP-confined RC piles possessed higher lateral load bearing capacity than unconfined piles. Akiyama et al [11] conducted bending tests on a new type of prestressed hollow RC pile and demonstrated that a sufficient lateral confinement of high-strength concrete provided by high-strength spirals and carbon-fiber sheets, combined with concrete infilling could substantially increase the flexural capacity of hollow RC piles.…”

Section: Introductionmentioning

confidence: 99%

Flexural performance of pretensioned centrifugal spun concrete piles with combined steel strands and reinforcing bars

Ren

Chen

et al. 2021

Structures

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“…Wu et al [23] proposed and experimentally investigated the behavior of hybrid glass fiber-reinforced polymer (GFRP) and steel bars reinforced prestressed high-strength concrete piles. Murugan et al [24,25] carried out experimental studies on the properties of CFRP and GFRP strengthened RC piles under static and cyclic lateral loadings.…”

Section: Introductionmentioning

confidence: 99%

Design and Performance of Concrete Pile Strengthened with Lengthened Steel-Tube Core: Model Tests and Numerical Simulations

Han

Lei

2021

Mathematical Problems in Engineering

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In order to solve the problem of insufficient bearing capacity of existing concrete piles, a type of concrete pile with an additional lengthened strengthening core is designed, by inserting the steel tube through guiding hole and pouring core concrete. To reveal the mechanical performance of the reinforced piles, scale model tests and finite element simulations were performed. The results showed that both the vertical and horizontal bearing capacity increase with the length of the stiffening core. The axial force of the enhanced core is also smaller than conventional concrete piles, and the extended core can share the axial force of the foundation pile to improve the stress distribution of the pile body. These findings point toward a useful and general method for increasing the load capacity of existing concrete piles.

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FRP-Strengthened RC Piles. I: Piles under Static Lateral Loads

Cited by 12 publications

References 14 publications

Flexural performance of pretensioned spun concrete piles reinforced with steel strands

Flexural performance of pretensioned spun concrete piles reinforced with steel strands

Flexural performance of pretensioned centrifugal spun concrete piles with combined steel strands and reinforcing bars

Design and Performance of Concrete Pile Strengthened with Lengthened Steel-Tube Core: Model Tests and Numerical Simulations

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