A theoretical axial stress–strain model for gangue ceramsite concrete confined with FRP tube

Guan, Hongbo; Xia, Yang; Zhang, Shouchao; Wu, J.L.; Wang, Jinli; Wang, Bo

doi:10.1016/j.conbuildmat.2022.128864

Cited by 10 publications

(3 citation statements)

References 39 publications

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“…Because of the water retention properties of ceramic granules, when FLWCC is used to strengthen OC, the water inside the ceramic granules can further promote the hydration reaction after the hardening of the interface between the new and old concrete, thus making the interface stronger. At present, there is a lot of research on the composition of raw materials [8][9][10], force characteristics [11][12][13] and durability properties [14][15][16]. The application of FLWCC in the field of repair and strengthening can give full play to its potential to replace the shortcomings of traditional concrete, which is in line with the environmental protection concept of "carbon neutrality".…”

Section: Introductionmentioning

confidence: 90%

Effect of Planting Rebars on the Shear Strength of Interface between Full Lightweight Ceramsite Concrete and Ordinary Concrete

Zhu,

Duan,

et al. 2023

Coatings

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The use of full lightweight ceramsite concrete (FLWCC) for the repair of ordinary concrete (OC) structures has a good application prospect in the field of engineering structural strengthening. However, the interface here is less studied at present. For this purpose, 10 sets of FLWCC (new concrete)–OC (old concrete) specimens were produced for the shear test to test the bonding properties of the interface. The results showed that the damage form was changed from brittle damage to ductile damage after strengthening. It was proven that planting rebars in the interface could improve the shear performance. The interface shear strength increased with the number of rebars and it had a better effect after the number was more than 2. The strength was related to the rebar diameter and the maximum was obtained when the diameter was 8 mm. The most suitable spacing of the bars was 80 mm. The one-way analysis of variance (ANOVA) showed that the number of rebars had the greatest effect on shear strength followed by rebar diameter, while the effect of the spacing of the bars was less pronounced. Moreover, Fib’s (2010) specification of the interface shear strength formula could be used for the calculation of FLWCC–OC.

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Section: Introductionmentioning

confidence: 90%

Effect of Planting Rebars on the Shear Strength of Interface between Full Lightweight Ceramsite Concrete and Ordinary Concrete

Zhu,

Duan,

et al. 2023

Coatings

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“…The cylinder diameter sizes cover 51 mm-508 mm. Besides the conventional concrete made by ordinary Portland cement (OPC concrete), test points containing coal gangue concrete [13], gangue ceramsite concrete [18] and seawater sea-sand concrete [15,19] are gathered herein. It can be seen that the experimental data is comprehensive although the source shows dispersion in some degree.…”

Section: Evaluation and Performance For Models Of Frp-confined Concre...mentioning

confidence: 99%

Evaluation of Ultimate Axial Strain Models for Fiber-Reinforced Polymer-Confined Concrete Cylinders

Chen,

Wang,

Zhang

et al. 2024

J. Phys.: Conf. Ser.

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Fiber-reinforced polymer (FRP) composite has been widely applied to reinforce and rehabilitate concrete columns in civil engineering. It is necessary to deeply understand the ultimate deformation (i.e., the ultimate axial strain εcc ) of FRP-confined concrete columns. A large database including different types of FRP (conventional FRP and large-rupture-strain FRP), concrete compressive strengths (19.4 MPa-169.7 MPa), and cylinder sizes (51 mm-508 mm), as well as various concrete types, is collected in this study. For this reason, several existing ultimate axial strain modes for FRP-confined cylinders have been evaluated via some statistical parameters based on the database. The verification results illustrate that the prediction accuracy of axial strain models is not good enough due to the intrinsic difficulty in predicting deformation and variability of data source, although the available models with better performance can achieve the average ratio between experimental and predicted strain value ( ε c c exp e / ε c c pred ) below 10%.

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“…The results showed that the specimens demonstrated good plasticity, and there was no significant decrease in the axial compression load-displacement curve. Guan et al [10] conducted axial compression performance tests on short-column specimens of coal-gangue LWAC restrained by FRP. The results showed that coal-gangue LWAC demonstrated high porosity and low strength, making its failure brittle, and that external FRP pipe confinement can significantly improve its strength and ductility.…”

Section: Introductionmentioning

confidence: 99%

A Study of the Performance of Short-Column Aggregate Concrete in Rectangular Stainless Steel Pipes under Axial Compression

Zhu,

Shao,

Chen

2024

Buildings

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In this study, 18 short-column lightweight ceramsite concrete samples were prepared in rectangular stainless steel pipes, which were used for axial pressure performance tests that took the cross-sectional length–width ratio of the rectangular stainless steel pipe (1.0, 1.5 and 2.0), the wall thickness of the steel pipe (3 mm, 4 mm and 5 mm), and the strength grade of the filled concrete (C20 and C30) as the main parameters. Then, the failure patterns, axial load–displacement curve, axial load–strain curve, ultimate bearing capacity and the interaction between the steel pipe and concrete in the specimens were measured. The test results revealed that the short-column concrete specimens in the steel pipes exhibited typical shear failure and “waist-bulging” failure under axial compressive loads. In the elastic stage, the bearing capacity of the specimens was able to reach 65–85% of the ultimate bearing capacity, with the residual bearing capacity essentially reaching 70% of the ultimate bearing capacity. Furthermore, the ultimate bearing capacity of the specimens demonstrated an increase with the rise in the strength grade of the filled concrete, with the thickness of the stainless steel pipe and with the decrease in the length–width ratio of the steel pipe cross-section. The specimens exhibited a distinct hoop effect. As the length–width ratio decreased and the hoop coefficient increased, the ductility coefficient and the strength enhancement coefficient basically displayed an increasing tendency, while the concrete contribution ratio exhibited a decreasing trend.

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A theoretical axial stress–strain model for gangue ceramsite concrete confined with FRP tube

Cited by 10 publications

References 39 publications

Effect of Planting Rebars on the Shear Strength of Interface between Full Lightweight Ceramsite Concrete and Ordinary Concrete

Effect of Planting Rebars on the Shear Strength of Interface between Full Lightweight Ceramsite Concrete and Ordinary Concrete

Evaluation of Ultimate Axial Strain Models for Fiber-Reinforced Polymer-Confined Concrete Cylinders

A Study of the Performance of Short-Column Aggregate Concrete in Rectangular Stainless Steel Pipes under Axial Compression

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