Experimental and numerical study on the eccentric compressive performance of RAC-encased RACFST composite columns

Ke, Xiaojun; Xu, Deyi; Cai, Min

doi:10.1016/j.engstruct.2020.111227

Cited by 25 publications

(3 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Guo et al [30] found through the eccentric test of the RAC-encased RACFST composite column that regardless of the eccentricity, the compressive bar always yielded before the concrete in the compression zone was crushed. Ke et al [31] analyzed the effects of the replacement ratio of RA, eccentricity, steel ratio and slenderness ratio on the eccentric compression performance of RAC-encased RACFST composite columns with circular steel tube. The results show that the bearing capacity of composite columns decreases with the increase of eccentricity, and increases with the increase of steel ratio and the decrease of slenderness ratio.…”

Section: Enccentric Compression Performancementioning

confidence: 99%

Research Progress of Steel-RAC Composite Structures

Xie

2024

IJMSTS

View full text Add to dashboard Cite

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.

show abstract

Section: Enccentric Compression Performancementioning

confidence: 99%

Research Progress of Steel-RAC Composite Structures

Xie

2024

IJMSTS

View full text Add to dashboard Cite

show abstract

“…In practical engineering, fiber-reinforced cementitious composites are easily available. They have been successfully used in various structures like underground mining pillar support [7] and composite columns [8].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Mechanical Characterizations of a POM Fiber-Reinforced Mortar Material

et al. 2022

View full text Add to dashboard Cite

In this study, a new fiber: polyoxymethylene fiber (POMF), was added into cement mortar to make a POM fiber-reinforced mortar (POMF-RM) material. When designing the mix proportion of POMF-RM, two factors were considered: fiber length (4, 8 and 12 mm) and dosage of POMF (volume fraction 0.24, 0.72 and 1.45%). When making the POMF-RM material, it was found that POMFs were easily dispersed into the mortar. Cubic and disc-shaped specimens of the POMF-RM material were made to conduct compression and Brazilian splitting experiments, respectively. It was found that, with increases in fiber length and volume content, the mechanical properties of the POMF-RM material were improved. Compared with the plain mortar, the elastic modulus, compressive and tensile strengths of the POMF-RM material significantly increased by 6.01, 13.18 and 5.34% at least, respectively. Among these two factors, the length of POMF played a more positive role. It was observed that the POMFs could effectively prevent the expansion of tensile cracks and significantly inhibit the complete disintegration of mortar fragments. This study showed that POMF was an excellent reinforcement material worthy of further research and application in practical engineering.

show abstract

“…Nevertheless, because of the inferior physical properties of RCA when compared to NCA, such as higher water absorption, higher porosity, lower density and the presence of initial cracks [1][2][3][4], the mechanical properties and durability of RAC are lower than that of natural aggregate concrete (NAC) [5][6][7][8][9]. As a result, the use of RAC is currently still limited, and most of the applications are in non-structural uses [10].…”

Section: Introductionmentioning

confidence: 99%

Stress–Strain Curve and Carbonation Resistance of Recycled Aggregate Concrete after Using Different RCA Treatment Techniques

Xuan

Poon

2021

Applied Sciences

View full text Add to dashboard Cite

Five recycled coarse aggregate (RCA) treatment techniques including flow-through carbonation, pressurized carbonation, wet carbonation, nano silica (NS) pre-spraying and combined pressurized carbonation with NS pre-spraying, were utilized to improve the performance of recycled aggregate concrete (RAC). The characteristics of the stress–strain curves of RACs including peak stress, peak strain, elastic modulus, ultimate strain and toughness were evaluated after using the above RCA treatment techniques. A theoretical model for natural aggregate concrete was used to analyse the stress–strain curve of RAC. Additionally, the carbonation resistance of RAC after using different RCA treatment techniques were investigated. The results showed that the calculated stress–strain curve of RAC based on the theoretical model matched well with the experimental results. Among the three types of carbonation techniques, pressurized carbonation caused the highest improvement in peak stress and elastic modulus of RAC, followed by flow-through carbonation, the last was wet carbonation. The NS pre-spraying method contributed to even higher improvement in peak stress and elastic modulus of RAC than the pressurized carbonation method. The combined pressurized carbonation with NS pre-spraying exhibited the highest enhancement of RAC because both the RCA and the new interface transition zone (ITZ) were improved. The carbonation resistance of RAC was improved after using all the studied RCA treatment techniques.

show abstract

Experimental and numerical study on the eccentric compressive performance of RAC-encased RACFST composite columns

Cited by 25 publications

References 38 publications

Research Progress of Steel-RAC Composite Structures

Research Progress of Steel-RAC Composite Structures

Experimental Investigation of Mechanical Characterizations of a POM Fiber-Reinforced Mortar Material

Stress–Strain Curve and Carbonation Resistance of Recycled Aggregate Concrete after Using Different RCA Treatment Techniques

Contact Info

Product

Resources

About