Reinforcement slip model considering corrosion effects

Zhang, Yixin; Bicici, Erkan; Sezen, Halil; Zheng, Shansuo

doi:10.1016/j.conbuildmat.2019.117348

Cited by 28 publications

(9 citation statements)

References 31 publications

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“…The residual plastic strains predicted by the unloading curve model was consistent with the test results, and the predictions of transition point and reloading strain also matched with the test points closely on the reloading curve. Considering the change of GPC properties, further experimental studies should be carried out to improve the proposed model, such as establishing the relationship between residual plastic strain, reloading strain, and uniaxial compressive strength grade of GPC [ 40 , 41 , 42 ].…”

Section: Resultsmentioning

confidence: 99%

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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Section: Resultsmentioning

confidence: 99%

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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“…After cracking, the number of horizontal cracks decreased, while the spacing and width of the cracks raised. This phenomenon mainly occurred since the frost action weakened the bond strength [12,13], which increased the required transmission length as the stress in the reinforcement was transferred into the concrete by the bond stress, resulting in an increase in the spacing of the cracks [34,39]. When failure appeared, the damage degree of the squat RC shear wall increased, the width of the primary shear crack rose, and the particle size of the crushed concrete fell, i.e., the concrete tended to be loose after FTCs, which is consistent with the results of the SEM analyses.…”

Section: Cyclic Behavior and Failure Modesmentioning

confidence: 99%

Seismic behavior of frost-damaged squat RC shear walls under artificial climate environment: a further experimental research

Rong

Zheng

Zhang

et al. 2020

Archiv.Civ.Mech.Eng

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In cold environment, the damage of freezing and thawing poses a great threat to the safety of concrete structures. In this study, six frost-damaged squat reinforced concrete (RC) shear walls were subjected to low cyclic reversal loading to investigate the effects of axial compression ratio, concrete strength and freeze-thaw cycles (FTCs) on the seismic performance of squat RC shear walls. The seismic behavior of the test specimens was evaluated in terms of the frost action at the microstructure level, frost-heave crack patterns, damage processes, failure patterns, hysteretic behaviors, skeleton curves, deformations, and energy dissipation capacities. It shows that the boundary elements and distributed reinforcements had obvious restraining effects on the development of frost-heave cracks. The FTC action weakened the load-carrying capacity, energy dissipation capacity, and shear resistance capacity of the walls. When the number of FTCs is kept at 200, with the increase of the concrete strength, the gel structure (C-S-H) gradually evolved from fibrous to nets, also the width and number of frost-heave cracks started to reduce, and the distribution of frost-heave cracks evolved from the middle of the specimen to the perimeter. Moreover, the energy dissipation capacity and the ratio of the shear displacement on the whole displacement after cracking loading condition started to increase.

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“…Specimens External admixture P (kN) reduce the errors caused by different construction techniques, the specimens are made by the same professional worker according to the actual construction process. The RE wall is made on the concrete bottom beam, and the section size of the bottom beam is 3000 mm 3 440 mm 3 400 mm (Wang et al, 2019;Zhang et al, 2020). As shown in Figure 5, the formwork used in the wall is magnesium-aluminum alloy plate.…”

Section: Groupmentioning

confidence: 99%

Seismic performance test of rammed earth wall with different structural columns

Zhou

Zhang

et al. 2020

Advances in Structural Engineering

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Rammed earth wall load-bearing dwellings are widely distributed in western China. Rammed earth has the advantages of warm in winter and cool in summer, and it is a kind of sustainable construction material. In recent years, in previous earthquakes, the collapse of rammed earth buildings is serious, resulting in huge losses of personnel and property. To improve the seismic performance of rammed earth buildings and retain the characteristics of local buildings, a reinforcement measure with additional structural columns is proposed in this article. Three kinds of structural columns are designed, which are cast-in-place concrete, square steel tube, and concrete-filled square steel tube core column. Through the quasi-static experimental study on the rammed earth wall, the effects of different structural columns on the failure shape, bearing capacity, deformation capacity, and energy dissipation capacity of the wall are compared. The test results show that adding structural columns on both sides of the wall can effectively restrain the rammed earth wall, restrain its brittle failure, significantly improve the energy dissipation capacity of the wall, and obviously improve the seismic performance of the wall. This measure is applicable to rammed earth buildings and provides theoretical support for improving the seismic performance of traditional dwellings.

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Reinforcement slip model considering corrosion effects

Cited by 28 publications

References 31 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

Seismic behavior of frost-damaged squat RC shear walls under artificial climate environment: a further experimental research

Seismic performance test of rammed earth wall with different structural columns

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