Axial stress-strain behavior of high-strength concrete confined by circular thin-walled steel tubes

Liu, Jiepeng; Teng, Yanguo; Yusong, Zhang; Wang, Xuanding; Chen, Y. Frank

doi:10.1016/j.conbuildmat.2018.05.021

Cited by 65 publications

(20 citation statements)

References 27 publications

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“…The modification was based on experimental results, which can reach the best potential of empirical and semi-empirical formulations. The modified model in this study was as follows:

where k r was a parameter related to the concrete strength, which was introduced in [ 35 ] to modify the descending section of the curve, and E c was the elastic modulus of concrete. Figure 7 showed a comparison between the Mander’s model and monotonic loading test results.…”

Section: Resultsmentioning

confidence: 99%

“…In previous studies, different unloading/reloading models [ 18 , 19 , 34 , 35 , 36 , 37 , 39 ] had been provided to predict the cyclic constitutive behavior of confined conventional cement concrete. In the following part, the Mander’s [ 34 ] and Lokuge’s [ 18 ] hysteretic constitutive model will be modified to obtain the predicted cyclic compressive stress–strain curve of confined GPC, and compare it with the cyclic stress–strain curve obtained from the experiment.…”

Section: Resultsmentioning

confidence: 99%

“…The formulations of the above unloading curve were similar to that of the cement concrete reinforced with stirrups or steel tubes [ 35 ]. It can be explained that confined constant stress resulted from yielded steel materials was equal to the confined stress applied in the triaxial test.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Hysteretic Behavior of Geopolymer Concrete with Active Confinement Subjected to Monotonic and Cyclic Axial Compression: An Experimental Study

Wang

Wei

et al. 2020

Materials

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This paper investigated the performance of actively confined geopolymer concrete (GPC) through experiments. The mechanical properties of GPC under triaxial stress states were analyzed and discussed from the prospects of failure modes, axial peak stress and strain, monotonic and cyclic constitutive relationships. The experimental results demonstrated that the loading modes (monotonic loading and cyclic loading) had little effect on the failure mode and axial peak stress and strain. The improvement of the strength and ductility of GPC with the increase in confinement level was consistent with that of the conventional cement concrete while the strain enhancement of confined GPC was lower than that of confined conventional cement concrete at the same confinement level. The curves of the monotonic stress–strain and the envelop of cyclic compression were predicted through Mander’s model with good accuracy. The unloading/reloading models proposed by Lokuge were modified and the predicted cyclic hysteresis curves for actively confined GPC were in good agreement with the cyclic compression results. Findings from this study provide references for the application of geopolymer concrete.

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“…The modification was based on experimental results, which can reach the best potential of empirical and semi-empirical formulations. The modified model in this study was as follows:

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Hysteretic Behavior of Geopolymer Concrete with Active Confinement Subjected to Monotonic and Cyclic Axial Compression: An Experimental Study

Wang

Wei

et al. 2020

Materials

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“…Tubed column (tube confined concrete column), in which the steel tube was only used as the transverse constraint of concrete, was proposed by Tomii et al (1985). Nowadays, tubed columns exhibit a variety of forms, such as steel tube confined concrete column (Guo et al, 2019; Hoang and Fehling, 2017; Liu et al, 2018), FRP confined concrete column (Albanesi et al, 2007; Hadi et al, 2015; Mohamed and Haitham, 2012; Zhu et al, 2005), PVC confined concrete column (Abdulla, 2017; Askari et al, 2020; Wang and Yang, 2012), and PVC-FRP Confined Concrete (PFCC) column (Fakharifar and Chen, 2016; Fang et al, 2020; Jiang et al, 2014a; Yu et al, 2018), etc. Compared with the researches on component level of these tubed columns, the studies dealing with the connection between the tubed column and Reinforced Concrete (RC) beam were still limited (Han et al, 2009; Zhou et al, 2017a).…”

Section: Introductionmentioning

confidence: 99%

Experimental study on low-strength concrete joint core strengthened with steel meshes for connecting PFCC column and RC beam

Feng

Fang

et al. 2020

Advances in Structural Engineering

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This paper presented a new joint core strengthened with multi-layer steel meshes for connecting the PVC-FRP Confined Concrete (PFCC) column and Reinforce Concrete (RC) beam. Seven specimens were tested under concentric compression and the effects of several parameters including the height, diameter of specimen and volume ratio of steel mesh on the compressive behaviors were investigated. Test results showed that all the reinforcement yielded successively and eventually the crushing of the concrete dominated the failures of specimens. The ultimate bearing capacity and ultimate equivalent axial strain decreased as the height of specimen increased, while they increased as the diameter of specimen or the volume ratio of steel mesh increased. The ultimate strains of all the reinforcement and concrete increased as the height of specimen increased while they decreased as the diameter of specimen or the volume ratio of steel mesh increased. Considering the influence of height of specimen, a modified formula for conveniently predicting the ultimate bearing capacity of the joint core strengthened with steel meshes was proposed based on the theory of confined concrete and superposition principle of multiple confinement. The predicted results were in good agreement with the experimental data. Additionally, an equivalent stress–strain relationship model of the joint core strengthened with steel meshes was suggested based on the experimental research. The predicted curves agreed well with the measured equivalent stress–strain curves. Moreover, a validated Finite Element (FE) model for the joint core strengthened with steel meshes was developed to conduct parametric studies, which broadened the available experimental results about the mechanical performances of the joint.

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“…While some research has been conducted on the behavior of RFCT columns, no systematic experimental research exists on the behavior of RFCT columns subjected to cyclic axial compressive load. e cyclic loading test can be utilized to measure the unloading and reloading branches of columns [22,23]. e response of RFCT columns can be quantified by the unloading and reloading stiffness process.…”

Section: Introductionmentioning

confidence: 99%

Response of RPC‐Filled Circular Steel Tube Columns under Monotonic and Cyclic Axial Loading

Rong

Zeng

Guo

et al. 2019

Shock and Vibration

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Results from mechanical tests on thirteen reactive powder concrete- (RPC-) filled circular steel tube (RFCT) columns under monotonic and cyclic axial loading are presented in this paper. The test variables include monotonic and cyclic loadings, confinement coefficient, and diameter of the steel tube. The test results show that the envelope curves of specimens under cyclic loading were similar to the load-deformation curves of the specimens under monotonic loading. Confinement coefficient had a significant influence on the failure modes of RFCT columns. With an increase in confinement coefficient of 0.53 to 0.98, the failure mode transformed from shear failure to compressive failure for specimens under monotonic and cyclic loading. In the elastic stage, no confining effect was provided by the steel tube to the RPC since Poisson’s ratio of steel was larger than the transverse deformation coefficient of RPC. Beyond the elastic stage, the axial compressive strength and ultimate strain of RPC increased significantly due to the confining effect when compared to unconfined RPC. Stress of the steel tube and RPC was investigated by using an elastic-plastic analytical model. Before yielding of the steel tube, stress development in the tube was faster in the longitudinal direction than in the hoop direction. The results of the experiment indicate that the compressive strength of RPC could be predicted by Mander’s model for confined concrete. Based on Mander’s model, an equation is extended to calculate the axial compressive strength of RFCT columns, and the predicted results are in good agreement with the test results. Based on comparative analysis of 180 RFCT columns axial compressive tests, the equation given by EC4 considering the confinement effect can be applied to predict the compressive strength of RFCT columns.

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Axial stress-strain behavior of high-strength concrete confined by circular thin-walled steel tubes

Cited by 65 publications

References 27 publications

Hysteretic Behavior of Geopolymer Concrete with Active Confinement Subjected to Monotonic and Cyclic Axial Compression: An Experimental Study

Hysteretic Behavior of Geopolymer Concrete with Active Confinement Subjected to Monotonic and Cyclic Axial Compression: An Experimental Study

Experimental study on low-strength concrete joint core strengthened with steel meshes for connecting PFCC column and RC beam

Response of RPC‐Filled Circular Steel Tube Columns under Monotonic and Cyclic Axial Loading

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