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

Ren, Junwei; Xu, Quanbiao; Chen, Gang; Liu, Chengbin; Gong, Sha; Lu, Yong

doi:10.1016/j.istruc.2021.10.052

Cited by 15 publications

(6 citation statements)

References 22 publications

(20 reference statements)

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“…Tian et al [10] have proposed a method with wide spacing and high-strength longitudinal bars, which simplifies the construction of node areas, reduces construction difficulties, and improves construction efficiency while ensuring construction quality. The widespread application of prestressing technology can draw insights from prefabricated prestressed bridge piers and prestressed steel strand piles [11][12][13][14][15]. Prestressed steel strands tackle issues related to the poor ductility of prestressed steel bars in ordinary prestressed piles, leading to compromised lateral resistance, flexural and shear ductility, and susceptibility to brittle failure.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Seismic Behavior of Prestressed Steel Strand Composite Reinforced High-Strength Concrete Column

Jin,

Li,

Wang

2024

Buildings

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To study the seismic performance of high-strength concrete columns reinforced with prestressed steel strands, five column specimens were designed and tested with varying parameters, such as axial compression ratio (0.2, 0.35, 0.5) and diameter of steel strands (9.5 mm, 11.1 mm, 12.7 mm), under low-cyclic reversed loading. The failure modes, hysteretic curves, stiffness degradation, ductility, and energy dissipation capacity of the prestressed steel strand-reinforced concrete columns were observed and recorded. The test results show that the failure mode of the prestressed steel strand-reinforced concrete columns is obvious bending failure. Within a certain range of axial compression ratio, the initial stiffness and load-bearing capacity of the specimens increase with the increase in axial compression ratio, but the plastic deformation capacity decreases. Within a certain range of steel strand diameter, the initial stiffness and load-bearing capacity of the specimens also increase with the increase in steel strand diameter, but the ductility coefficient first increases and then decreases. In addition, the seismic performance of prestressed steel strand-reinforced concrete columns was analyzed by the finite element method using DIANA software, and the results were compared with the test results. It was found that the hysteretic curve and stiffness degradation curve obtained from the finite element model are in good agreement with the test results, and the finite element model can accurately study the seismic performance of this type of column. Finally, based on the finite element model, the influence of different parameters on the mechanical properties of the column was discussed.

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Section: Introductionmentioning

confidence: 99%

Investigation on Seismic Behavior of Prestressed Steel Strand Composite Reinforced High-Strength Concrete Column

Jin,

Li,

Wang

2024

Buildings

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“…PHC piles have been extensively used in foundation engineering in soft soil regions as a consequence of the advantages in terms of good quality control, high axial load-carrying capacity, efficient on-site construction and cost effectiveness. However, the helical grooved steel bars are generally used as the prestressing tendons in PHC piles, which have the disadvantage of poor tensile ductility with a rupture strain of only about 3.0% [1,2]. Moreover, the contact between the pier heads of the steel bars and the anchor holes of the end plates at both ends of the PHC piles is often insufficient, which results in uneven tensioning stresses and even premature brittle rupture of the prestressing steel bars.…”

Section: Introductionmentioning

confidence: 99%

“…In order to overcome the problem with limited tensile deformation ability of steel bars, methods of using steel strands with better elongation and higher strength as the prestressing tendons have been put forward [1,2], and piles using such prestressing steel strands, called as PSC piles, have been developed. Compared with common prestressed concrete round piles and octagonal piles [8][9][10], the initial pre-stresses in prestressing tendons and concrete in PSC piles are evenly distributed along the pile body due to the special anchorage structure.…”

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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“…The pile lateral resistance at the same depth decreases with an increase in the number of cycles [22][23][24]. Liu Jun-Wei et al found that the flexural stiffness of reinforced PHC piles was greater than that of conventional PHC piles, and the momentbearing capacity of reinforced piles was significantly higher than that of conventional piles by comparing the flexural performance of reinforced PHC piles with that of conventional PHC piles [25][26][27][28]. Mustafa Jafariet et al studied the bearing capacity of pipe piles at the end, and the results showed that the bearing capacity of pipe piles is close to the limit value, which is less than or at most equal to the end-bearing capacity of an embedded strip foundation of width equal to the pipe wall thickness.…”

Section: Introductionmentioning

confidence: 99%

Load-Bearing Characteristics of PHC Piles Constructed by the Inner Digging Method Based on Ultimate Load Testing and Numerical Simulation

Zhang

Wang³

et al. 2023

Applied Sciences

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This paper studies the load-bearing characteristics of two prestressed high-strength concrete (PHC) pipe piles constructed by the medium mid-digging and hammering methods. The ultimate load tests and numerical simulations of the pipe piles constructed by both methods were carried out to analyze the ultimate lateral resistance, and ultimate resistance performance characteristics of the two pipe piles and the influence of the wall thickness of the pipe piles on the bearing performance. The test results show that the pipe pile constructed by the middle inner digging method has a higher pile quality. The single pile bearing capacity of the pipe pile constructed by the middle inner digging method is 50% higher than that of the common hammering method. The enlarged part of the pile end has an obvious effect on improving the bearing capacity. The settlement of the pipe pile constructed by the middle inner digging method is smaller than that of the hammering method. The large diameter pipe pile constructed by the middle inner digging method usually shows characteristics of the end-bearing pile. The resistance of the pile end accounts for 40–50% of the top load. The numerical simulation results agree with the field test and are compared and discussed. The simulation results show that when the bearing capacity of the pile is provided by the pile side frictional resistance, the influence of the pile wall thickness on the bearing capacity is insignificant. When the top pile load is close to the bearing capacity of the pipe pile, the influence of the pipe pile wall thickness on the bearing capacity is greater.

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

Cited by 15 publications

References 22 publications

Investigation on Seismic Behavior of Prestressed Steel Strand Composite Reinforced High-Strength Concrete Column

Investigation on Seismic Behavior of Prestressed Steel Strand Composite Reinforced High-Strength Concrete Column

Seismic performance of pretensioned centrifugal spun concrete piles with steel strands

Load-Bearing Characteristics of PHC Piles Constructed by the Inner Digging Method Based on Ultimate Load Testing and Numerical Simulation

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