Axial performance degradation of squared CFST stubs in severe cold and acid rain area

Zhang, Tong; Lyu, Xuetao; Liu, Haiqing; Zhang, Liqiang; Wang, Junfeng; Gao, Shan

doi:10.1016/j.conbuildmat.2020.120612

Cited by 25 publications

(11 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The relationship curves of the eccentric compression load N vs. vertical strain ε (ratio of vertical displacement increment to member length) and the axial compression load N vs. axial displacement Δ (axial compression displacement increment) are depicted in Figure 2 and Figure 3 . Those curves demonstrate that the trend of the numerical modelling results coincide with the experimental results in [ 34 , 35 ]. However, there are differences between the initial stiffness value and the ultimate bearing capacity of the specimen.…”

Section: Finite Element Model Of the Cfst-lc Under Eccentric Compressionsupporting

confidence: 83%

“…Besides, the experimental measurement errors of axial displacement can also result in the difference between experimental and numerical results. According to the descending branches of those curves, except for specimen NC-50-0, the results calculated by the proposed numerical model are more consistent with the experimental results than the numerical modelling results in [ 34 , 35 ]. It further verifies the feasibility and reliability of the model proposed in this paper.…”

Section: Finite Element Model Of the Cfst-lc Under Eccentric Compressionsupporting

confidence: 76%

“… Results verification of Ref. [ 35 ]. ( a ) S3-0-0; ( b ) S3-0-10; ( c ) S3-0-20; ( d ) S3-0-30; ( e ) S4.5-0-0; ( f ) S4.5-0-10; ( g ) S4.5-0-20; ( h ) S4.5-0-30.…”

Section: Figurementioning

confidence: 53%

“…The concrete-filled square steel tube long columns under eccentric compression in [ 34 ] and the concrete-filled square steel tube short columns under axial compression in [ 35 ] are simulated and verified with the established numerical model. The parameters of specimens in [ 34 , 35 ] are given in Table 1 . The numerical modelling results of the ultimate bearing capacity of each specimen are obtained and shown in Table 2 .…”

Section: Finite Element Model Of the Cfst-lc Under Eccentric Compressionmentioning

confidence: 99%

See 3 more Smart Citations

Prediction and Analysis of Ultimate Bearing Capacity of Square CFST Long Column under Eccentric Compression after Acid Rain Corrosion

Lyu

Zhang

et al. 2021

Materials

Self Cite

View full text Add to dashboard Cite

This paper adopts the method of steel tube wall thickness and strength reduction to simulate corrosion damage. The numerical model of the square concrete-filled steel tube long column (SCFST-LC) under eccentric compression after acid rain corrosion is established in the finite element software, ABAQUS. The reliability and accuracy of the model are verified by comparing it with published relevant experimental results. The failure mode, load-deformation curve, and ultimate compressive load were analysed. Following that, the impacts of section size, yield strength of the steel tube, axial compressive strength of concrete, steel ratio, slenderness ratio, and load eccentricity on its ultimate compressive load are comprehensively investigated. The results demonstrate that the ultimate compressive load of the SCFST-LC decreases significantly with the increase in corrosion rate. The corrosion rate increases from 10 to 40%, and the ultimate bearing capacity decreases by 37.6%. Its ultimate bearing capacity can be enhanced due to the increase in section size, material strength, and steel ratio. In contrast, the ascending slenderness ratio and load eccentricity has harmful effects on the ultimate compressive load of the specimens. Finally, a simplified formula for the axial compressive load of the SCFST-LC under eccentric compression after acid rain corrosion is proposed. The calculation accuracy is high and the deviation of the results is basically within 15%, which is in good agreement with the numerical simulation results.

show abstract

Section: Finite Element Model Of the Cfst-lc Under Eccentric Compressionsupporting

confidence: 83%

Section: Finite Element Model Of the Cfst-lc Under Eccentric Compressionsupporting

confidence: 76%

“… Results verification of Ref. [ 35 ]. ( a ) S3-0-0; ( b ) S3-0-10; ( c ) S3-0-20; ( d ) S3-0-30; ( e ) S4.5-0-0; ( f ) S4.5-0-10; ( g ) S4.5-0-20; ( h ) S4.5-0-30.…”

Section: Figurementioning

confidence: 53%

Section: Finite Element Model Of the Cfst-lc Under Eccentric Compressionmentioning

confidence: 99%

See 2 more Smart Citations

Prediction and Analysis of Ultimate Bearing Capacity of Square CFST Long Column under Eccentric Compression after Acid Rain Corrosion

Lyu

Zhang

et al. 2021

Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…Compared with other reinforced concrete structures, hydraulic concrete is more easily damaged because of its longterm contact with reservoir water [5,6], occurring in concrete-face slabs of rockfill dams, diversion tunnels, and spillways [7]. In addition, the real service environment of hydraulic concrete is more complex, which is not only affected by SRC, but also freeze-thaw damage, chemical erosion, dry-wet damage, and other functions that accelerate the degradation of the hydraulic concrete [8,9]. Especially in cold regions, hydraulic concrete is highly susceptible to freezethaw cycles due to seasonal variations of temperature and nearly 100% of reinforced concrete structure in northeast China suffers from local or large-area freeze-thaw damage [10,11].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Freeze‐Thaw Damage on Corrosion in Reinforced Concrete

Guan

Chen

et al. 2021

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

The existing studies of the corrosion of reinforced concrete have mainly focused on the interface area and chemical ion erosion, ignoring the specific service environment of the reinforced concrete. In this study, the effect of freeze-thaw damage was investigated via corrosion experiments under different freeze-thaw cycle conditions. Steel reinforcement corrosion mass, ultimate pull-out force, corrosion rate, and bond slippage were chosen as characteristic parameters in the experiments, and scanning electron microscopy (SEM) analysis was used to explain the mechanism of action of freeze-thaw damage on corrosion. The results showed that, under identical corrosion conditions, the mass of steel reinforcement corrosion and corrosion rate increased by 39.6% and 39.7% when comparing 200 freeze-thaw cycles to 0 cycles, respectively. The ultimate pull-out force and bond slippage after 200 freeze-thaw cycles decreased by 73% and 31%, respectively, compared with 0 freeze-thaw cycles. In addition, SEM analysis indicated that microstructure damage caused by freeze-thaw cycles accelerated the corrosion reaction and decreased cementitious properties, leading to decreasing ultimate pull-out force and bond slippage. The effect of freeze-thaw cycles and steel reinforcement corrosion on the macro mechanical properties of concrete is not a simple superposition.

show abstract

Experimental investigation and analysis on the axial compressive performance of recycled concrete-filled corroded steel tubular columns

Hui

et al. 2022

Archiv.Civ.Mech.Eng

View full text Add to dashboard Cite

Axial performance degradation of squared CFST stubs in severe cold and acid rain area

Cited by 25 publications

References 28 publications

Prediction and Analysis of Ultimate Bearing Capacity of Square CFST Long Column under Eccentric Compression after Acid Rain Corrosion

Prediction and Analysis of Ultimate Bearing Capacity of Square CFST Long Column under Eccentric Compression after Acid Rain Corrosion

The Effect of Freeze‐Thaw Damage on Corrosion in Reinforced Concrete

Experimental investigation and analysis on the axial compressive performance of recycled concrete-filled corroded steel tubular columns

Contact Info

Product

Resources

About