Flexural performances of pre-stressed concrete piles reinforced with hybrid BFRP and steel bars

Wu, Ping; Guo, Yong; Zhu, Danyan; Jin, Weiliang; Lee, Chack-fan

doi:10.1080/19648189.2020.1715846

Cited by 5 publications

(5 citation statements)

References 24 publications

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“…To improve the overall structural performances of PHC piles, scholars have carried out extensive research and proposed some meaningful measures such as increasing reinforcement ratio, confining the pile body with carbon-fiber sheets, filling concrete into the pile core (concrete infilling) and longitudinal reinforcement with non-prestressing tendons [5][6][7]. These findings provide an important basis for the engineering application of the improved PHC piles.…”

Section: Introductionmentioning

confidence: 99%

Seismic performance of pretensioned centrifugal spun concrete piles with steel strands

Ren

Chen

et al. 2023

Structures

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Section: Introductionmentioning

confidence: 99%

Seismic performance of pretensioned centrifugal spun concrete piles with steel strands

Ren

Chen

et al. 2023

Structures

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“…PHC pipe piles are primarily used for the soft foundation treatments in high-grade highways, particularly for road sections with structural objects, bridge head transition sections, and embankments with high reclamation and thick layers of weak soil. Additionally, they are also suitable for road sections with a tight schedule and general soft foundation conditions [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…These studies have included field tests, finite element simulation studies [12,13], predictions of pile bearing capacities [14,15], and construction reliability [16]. Despite these efforts, slip accidents still occur in actual projects, notably in regions like southwestern and southeastern China [5,17], primarily due to insufficient horizontal bearing capacities [18,19]. Common structural forms, such as monopile structural forms without a pile cap and monopile structural forms with a pile cap, provide limited horizontal restraints on composite roadbeds and lack sufficient lateral stability [20,21].…”

Section: Introductionmentioning

confidence: 99%

“…In the computational model, the plates are stacked on a continuum, so the plates overlap the soil. In order to accurately calculate the bulk density of the soil and structure in the finite element model, the bulk density of the plate material should be subtracted from the bulk density of the soil, so the bulk weight of the equivalent plate is calculated by Equation (5).…”

mentioning

confidence: 99%

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Field and Numerical Study of the Bearing Capacity of Pre-Stressed High-Strength Concrete (PHC)-Pipe-Pile-Reinforced Soft Soil Foundations with Tie Beams

Yao,

Hong,

Liu

et al. 2023

Applied Sciences

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Pre-stressed high-strength concrete pipe piles (PHC pipe piles) have been widely used in actual soft foundation treatment projects due to their reliable quality, fast construction, assembly line production, and environmental friendliness. However, large-scale slip damage still occurs in construction projects. In order to reduce and avoid such accidents, a highway in Guangdong (section K31+100~K31+388) was taken as an example for this study. Plaxis 2D software (V22.01.00) was used to establish a PHC pipe pile composite roadbed model and investigate the effects of tie beam form, pile lengths, pile spacings, pile verticality, and embankment filling loading modes on the settlement and stability of the composite roadbed. The results show that the original treatment plan, which had the form of a PHC pipe pile with caps, had a low horizontal bearing capacity and a poor anti-disturbance ability, leading to the occurrence of a landslide accident. A comparison of different structural forms revealed that the longitudinal and transverse tie beam form was the most stable, followed by the transverse tie beam form, longitudinal tie beam form, PHC pipe pile form with caps, and PHC pipe pile form without caps. Compared to the structural form of PHC pipe piles with pile caps, the stabilities of the transverse tie beam form and the longitudinal tie beam form were improved by 42.47% and 38.61%, respectively, while that of the longitudinal and transverse tie beam form was improved by 50.87%. The application of longitudinal and transverse tie beams effectively reduced the settlement of the composite roadbed, as confirmed by both measured data and finite element analysis. This structure achieved the desired vertical settlement control and lateral anti-slip effects.

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“…Test results indicated that the axial compression ratio and prestressing level of prestressed tendon significantly influenced the seismic performance of prestressed high-strength concrete piles. Wu et al [18,19] developed prestressed high-strength concrete (PHC) piles reinforced with high-strength materials (glass fiber-reinforced polymer (GFRP) bars) for flexural performance enhancement.…”

Section: Introductionmentioning

confidence: 99%

Study on Seismic Performance of Improved High‐Strength Concrete Pipe‐Pile Cap Connection

Yang

Nan

2020

Advances in Materials Science and Engineering

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Four prestressed high-strength concrete pile- (PHC pile-) pile cap connections under low-cycle loading were tested to study the test phenomena, failure modes, hysteretic performance, ductility, and bearing capacity. The PHC piles were reinforced with steel fiber and deformed bars and CFRP. The tests results showed that the connections were damaged by bending. The concrete of the caps were squeezed to be crushed. The concrete of connection was crushed and formed a hinge joint that resulted in the connection rotating unrestricted, and the rotation capacity of connection increased. The PHC pile reinforced with steel fiber and deformed bars can improve the displacement ductility of the connections. The finite element software ABAQUS was used to simulate the nonlinear behavior of pile-cap connections. The prediction agreed relatively well with the experimental results. The stress and strain of specimens were studied. The connections should be designed with enough rotating capacity and make sure the cap will not be damaged by squeezing or prying due to the rotation of pile end.

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Flexural performances of pre-stressed concrete piles reinforced with hybrid BFRP and steel bars

Cited by 5 publications

References 24 publications

Seismic performance of pretensioned centrifugal spun concrete piles with steel strands

Seismic performance of pretensioned centrifugal spun concrete piles with steel strands

Field and Numerical Study of the Bearing Capacity of Pre-Stressed High-Strength Concrete (PHC)-Pipe-Pile-Reinforced Soft Soil Foundations with Tie Beams

Study on Seismic Performance of Improved High‐Strength Concrete Pipe‐Pile Cap Connection

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