Axial compressive performance of RAC-encased RACFST composite columns

Cai, Min; Ke, Xiaojun; Su, Yisheng

doi:10.1016/j.engstruct.2020.110393

Cited by 29 publications

(4 citation statements)

References 48 publications

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“…A reduction in the bearing capacity of the specimens can be observed as the replacement ratio of RCA increased. This is similar to the findings of Cai et al [ 40 ]. Compared with that of specimen Z5-0-1-30 with NCA, the bearing capacity of specimen Z5-100-1-30 with 100% RCA was 13.8% lower.…”

Section: Resultssupporting

confidence: 93%

“…A reduction in the bearing capacity of the specimens can be observed as the replacement ratio of RCA increased. This is similar to the findings of Cai et al [40]. Compared with that of The label "Z5-100-1-30"represents the slenderness ratio is 5.6, the RCA replacement rate is 100%, the CFRP is 1 layer, the concrete strength is C30.…”

Section: Load-displacement Relationshipssupporting

confidence: 90%

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Axial compression behavior of carbon fiber reinforced polymer confined partially encased recycled concrete columns

Wang,

Liang,

Wang

et al. 2024

PLoS ONE

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Partially encased concrete (PEC) has better mechanical properties as a structure where steel and concrete work together. Due to the increasing amount of construction waste, recycled aggregate concrete (RAC) is being considered by more people. However, although RAC has more points, the performance is inferior to natural aggregate concrete (NAC). To narrow or address this gap, lightweight, high-strength and corrosion-resistant CFRP can be used, also protecting the steel flange of the PEC structure. Therefore, carbon fiber reinforced polymer (CFRP) confined partially encased recycled coarse aggregate concrete columns were studied in this paper. With respect to different slenderness ratios, recycled coarse aggregate(RCA) replacement ratios, and number of CFRP layers, the performance of the proposed CFRP restrained columns are reported. The RCA replacement ratio is analyzed to be limited negative impact on the bearing capacity, generally within 6%. As for the slenderness ratio, the bearing capacity increased with it. However, wrapping CFRP significantly increased the bearing capacity. Considering the arch factor, a simple formula for calculating the ultimate strength of CFRP-confined partially encased RAC columns is developed based on EC4 and GB50017-2017. By comparison with the experimental values, the error is within 10%.

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Section: Resultssupporting

confidence: 93%

“…A reduction in the bearing capacity of the specimens can be observed as the replacement ratio of RCA increased. This is similar to the findings of Cai et al [40]. Compared with that of The label "Z5-100-1-30"represents the slenderness ratio is 5.6, the RCA replacement rate is 100%, the CFRP is 1 layer, the concrete strength is C30.…”

Section: Load-displacement Relationshipssupporting

confidence: 90%

Axial compression behavior of carbon fiber reinforced polymer confined partially encased recycled concrete columns

Wang,

Liang,

Wang

et al. 2024

PLoS ONE

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show abstract

“…The ductility of the composite column is improved with the increase of the stirrup ratio, and the damage develops slowly in the later stage. Cai et al [27][28] analyzed 20 RACencased RACFST composite columns under axial pressure and found that the interaction between RACFST and external reinforced RAC had a significant impact on the axial compressive capacity and stiffness of the composite columns.…”

Section: Axial Compression Performancementioning

confidence: 99%

Research Progress of Steel-RAC Composite Structures

Xie

2024

IJMSTS

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As a new sustainable development technology, recycled aggregate concrete (RAC) has a profound impact on the green development of construction engineering. However, due to the defects of RAC itself, it is hindered in engineering application. The steel-RAC composite structure can effectively enhance the mechanical properties of RAC and promote the application of RAC in practical engineering. Based on the recent research status of steel-RAC composite structures, including recycled aggregate concrete filled steel tube (RACFST) columns and recycled aggregate concrete -encased recycled aggregate concrete filled steel tube (RAC-encased RACFST) composite columns the axial compression, the compression performance, seismic performance and fire resistance of composite columns are reviewed in this paper, and the future research direction is proposed.

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“…8 This composite member, called rubberized concrete-filled steel tube (RuCFST), exhibits improved compressive strength and ductility. 9,10 Gholampour et al conducted experiments on the axial compressive behavior of RuC under active confinement. 11 The tested RuC specimens had rubber replacement ratios ranging from 0% to 18% and a confinement level up to 0.67, defined by f l / f co , where f l is the lateral active compressive stress and f co is the cylinder compressive strength of concrete.…”

Section: Introductionmentioning

confidence: 99%

Experimental assessment and compressive constitutive model of rubberized concrete confined by steel tube

Zhao

Huang

Wang

2023

Progress in Rubber, Plastics and Recycling Technology

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To investigate the confining effect and axial compressive behavior of rubberized concrete (RuC) confined by steel tube, axial compression tests were carried out on 12 circular RuC cylinders confined by steel tube. The cylinders considered parameters such as steel tube thicknesses (2 mm, 3 mm, 4 mm) and rubber volume replacement ratios of the fine aggregates (0%, 10%, 20%, and 30%). It was observed that the compressive strength of RuC decreases as the rubber volume replacement ratio increases. However, an increase in steel tube thickness enhances the confining effect of the core RuC, leading to an increase in its compressive strength and the corresponding strain, similar to that of conventional concrete. Moreover, post-peak curves are more likely to exhibit a strengthening part in confined concrete with more rubber content. Furthermore, a model was developed to determine the compressive strength of RuC confined by steel tube. Finally, an axial stress-strain model of steel tube confined RuC was proposed, which was validated against test results.

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Axial compressive performance of RAC-encased RACFST composite columns

Cited by 29 publications

References 48 publications

Axial compression behavior of carbon fiber reinforced polymer confined partially encased recycled concrete columns

Axial compression behavior of carbon fiber reinforced polymer confined partially encased recycled concrete columns

Research Progress of Steel-RAC Composite Structures

Experimental assessment and compressive constitutive model of rubberized concrete confined by steel tube

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