Seismic performance of pretensioned centrifugal spun concrete piles with steel strands

Ren, Junwei; Xu, Quanbiao; Chen, Gang; Yu, Xiaodong; Gong, Sha; Lu, Yong

doi:10.1016/j.istruc.2023.02.107

Cited by 5 publications

(3 citation statements)

References 26 publications

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“…The unloading and reloading paths of the model follow the elastic stiffness, and the envelope bond stress-slip curve is recaptured at the point where unloading occurs. Although the bond deterioration is not considered in the bond-slip model, the simulation accuracy and reliability of this model as a whole has been verified in previous studies (Ren et al 2022;Ren et al 2023). Other symbolic definitions and specific values of the above models can be found from Ren et al (2022).…”

Section: Materials Modelsmentioning

confidence: 74%

See 1 more Smart Citation

Seismic Performance of Pretensioned Centrifugal Spun Concrete Piles with Combined Steel Strands and Deformed Steel Bars

Ren,

Xu,

Chen

et al. 2023

J. Struct. Eng.

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Pretensioned spun high-strength concrete piles usually use the traditional helical grooved steel bars as the main reinforcement, which leads to insufficient ductility. Replacing prestressing steel bars with steel strands can effectively overcome the problem. To further enhance the overall seismic performance of the piles, pretensioned centrifugal spun concrete piles with a combined use of pretensioned steel strands and nonprestressing deformed steel bars (PSRC piles) have been developed. This paper presents the experimental and numerical investigations into the seismic performances of PSRC piles. Three full-scale PSRC pile specimens have been tested under lateral cyclic loading with different axial compressive forces, and the results are analyzed in detail and discussed. The influence of incorporating the deformed steel bars on the cyclic behavior of piles is examined with comparison to the previous test results of the counterpart piles with only steel strands.A detailed finite element model of the PSRC pile specimens is developed and verified against the test results.2 Parametric analyses are then carried out using the validated model. The results show that the incorporation of non-prestressing deformed steel bars markedly improves the cracking behavior of the piles with much diffused crack distributions. The combined use of steel strands and deformed bars also results in better deformation capacity as well as higher load bearing capacity. By adjusting the concrete wall thickness and selecting a desirable ratio of prestressing steel strands and non-prestressing deformed bars, sufficient deformation and load bearing capacities can be ensured with the piles.

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Section: Materials Modelsmentioning

confidence: 74%

“…The authors (Ren et al 2023) have previously conducted the seismic experiments of three PSC pile specimens with the same design as the PSRC pile specimens presented herein. However, in the PSC piles only prestressing tendon HSSs were used as the longitudinal reinforcement, as shown in Table 1.…”

Section: Comparison Between Psrc Piles and Psc Pilesmentioning

confidence: 99%

Seismic Performance of Pretensioned Centrifugal Spun Concrete Piles with Combined Steel Strands and Deformed Steel Bars

Ren,

Xu,

Chen

et al. 2023

J. Struct. Eng.

Self Cite

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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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Shaking table test of prestressed high-strength concrete pipe piles reinforced with non-prestressed steel reinforcement

Wang,

Zhang,

Zhou

et al. 2024

Engineering Structures

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Seismic performance of pretensioned centrifugal spun concrete piles with steel strands

Cited by 5 publications

References 26 publications

Seismic Performance of Pretensioned Centrifugal Spun Concrete Piles with Combined Steel Strands and Deformed Steel Bars

Seismic Performance of Pretensioned Centrifugal Spun Concrete Piles with Combined Steel Strands and Deformed Steel Bars

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

Shaking table test of prestressed high-strength concrete pipe piles reinforced with non-prestressed steel reinforcement

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