Tests on axial strength of circle CFST stub columns under marine atmosphere in cold region

Gao, Shan; Peng, Zhen; Li, Xiaodong; Chen, Dong

doi:10.1016/j.conbuildmat.2019.117073

Cited by 27 publications

(11 citation statements)

References 6 publications

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“…Compared with the failure modes of ordinary CFST stub columns (local outward buckling) and hollow steel tubes (outward and inward local bucking) under axial compression [7,20], these circular thin-walled CFST short columns exhibited a failure pattern of obvious shear bulge with slight local outward buckling, whether the steel tube was corroded or not. Evident shear deformation lines of approximately 45° were found on the steel tubes, which were consistent with the failure modes of CFST columns reported in the literature [21,29]. After the compression tests on CFST columns, the outer steel tubes were removed, and the typical failure patterns of the core concrete were observed ( Figure 6).…”

Section: Failure Modessupporting

confidence: 88%

“…The details of the circular thin-walled CFST stub column are shown in Figure 1. The mass corrosion ratio β0 (Equation 1) is generally adopted in expressing steel corrosion [21,27]. However, in the study of the corrosion of thin-walled steel tubes, the wall-thickness corrosion ratio β (Equation (2)) is more convenient than the mass corrosion ratio [7,20].…”

Section: Raw Materials and Specimens' Fabricationmentioning

confidence: 99%

“…As shown in Equation (4), the two calculation methods for the steel tube's corrosion degree are consistent for thin-walled CFST members. Taking a steel tube with a wall thickness of 0.92 mm and diameter of 139 mm as an example, the corresponding corrosion ratios of β0 and β are 50.17% and 50%, respectively, when the 0.46 mm wall thickness of the steel tube is corroded, are approximately The mass corrosion ratio β 0 (Equation 1) is generally adopted in expressing steel corrosion [21,27]. However, in the study of the corrosion of thin-walled steel tubes, the wall-thickness corrosion ratio β (Equation 2) is more convenient than the mass corrosion ratio [7,20].…”

Section: = × 100%mentioning

confidence: 99%

“…Diameter/thickness is an important parameter of a circular thin-walled CFST stub column, and has important influences on its AULC [20,21]. The actual diameter/thickness ratio of a CFST column changes with the corrosion of the steel tubes.…”

Section: Effect Of Diameter-to-thickness Ratio On Specimens' Ultimatementioning

confidence: 99%

See 3 more Smart Citations

Degradation of Axial Ultimate Load-Bearing Capacity of Circular Thin-Walled Concrete-Filled Steel Tubular Stub Columns after Corrosion

Zhang

Xia

et al. 2020

Materials

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This work aimed to investigate the effects of steel tube corrosion on the axial ultimate load-bearing capacity (AULC) of circular thin-walled concrete-filled steel tubular (CFST) members. Circular thin-walled CFST stub column specimens were made of steel tubes with various wall-thicknesses. These CFST column specimens were subjected to an accelerated corrosion test, where the steel tubes were corroded to different degrees of corrosion. Then, these CFST specimens with corroded steel tubes experienced an axial static loading test. Results show that the failure patterns of circular thin-walled CFST stub columns with corroded steel tubes are different from those of the counterpart CFST columns with ordinary wall-thickness steel tubes, which is a typical failure mode of shear bulging with slight local outward buckling. The ultimate strength and plastic deformation capacity of the CFST specimens decreased with the increasing degree of steel corrosion. The failure modes of the specimens still belonged to ductile failure because of the confinement of outer steel tube. The degree of steel tube corrosion, diameter-to-thickness ratio, and confinement coefficient had substantial influences on the AULC and the ultimate compressive strength of circular thin-walled CFST stub columns. A simple AULC prediction model for corroded circular thin-walled CFST stub columns was presented through the regression of the experimental data and parameter analysis.

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Section: Failure Modessupporting

confidence: 88%

Section: Raw Materials and Specimens' Fabricationmentioning

confidence: 99%

Section: = × 100%mentioning

confidence: 99%

Section: Effect Of Diameter-to-thickness Ratio On Specimens' Ultimatementioning

confidence: 99%

See 2 more Smart Citations

Degradation of Axial Ultimate Load-Bearing Capacity of Circular Thin-Walled Concrete-Filled Steel Tubular Stub Columns after Corrosion

Zhang

Xia

et al. 2020

Materials

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show abstract

“…Concrete structures retrofitted by steel confinement relies on the composites effect between two materials. Corrosion of steel confinement will deteriorate the structural performance of confined concrete [11][12][13]. Han et al [11] concluded that deterioration mechanism of corroded external steel confined concrete depends on two aspects, i.e., reduction in sectional area of steel resulted in decrease in strength of steel confinement and reduction of confining effect on concrete leads to decrease in strength of concrete and deformation ability of confined concrete.…”

Section: Introductionmentioning

confidence: 99%

Corrosion effects on axial compressive behavior of steel strapping tensioning technique-confined concrete

Goh,

Ler,

Chin

et al. 2023

Res. Eng. Struct. Mat.

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This paper presents an experimental study on effect of corrosion on durability performance of circular Steel Strapping Tensioning Technique (SSTT)-confined concrete tested under uniaxial compression. A total of 13 specimens, including 11 confined specimens and 2 plain specimens were tested in this study. The main parameters were prestressing level and corrosion protection. Corrosion was simulated through impressed current accelerated corrosion technique. The experimental results indicated that influence of corrosion was insignificant on peak strength and slight reduction in deformation ability to corroded circular SSTT-confined concrete under low corrosion severity. It was observed that Zn-Al-Cd ingot and long-oil alkyd paint coating shows good protection ability, while 6061 aluminum alloy and 99.9% pure magnesium is not suitable to be used as corrosion protection system. Based on regression analysis, prediction models for peak stress and peak strain for circular corroded SSTT-confined concrete were proposed.

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Materials and structures at cold‐region and Arctic low temperatures: A state‐of‐the‐art review

Yan

2024

Earthquake Engineering and Resilience

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Construction of infrastructures in cold regions and the Arctic has grown rapidly since the 2000s, including railways, platforms, bridges, roads, and pipelines. However, the harsh low temperatures significantly influence the mechanical behaviors of construction materials, and bring safety and durability challenges to these engineering structures. This study made a state‐of‐the‐art review on materials and structures exposed to low temperatures. This review started from constructional‐material mechanical properties, including concrete, steel reinforcement, mild/high‐strength steel plate, and steel strand at low temperatures. It reflected that low temperatures improved the strength of construction materials. However, the freeze–thaw cycles (FTCs) had a detrimental effect on the modulus and strength of concrete. Furthermore, it was revealed that low temperatures increased the interfacial bonding strength between the steel reinforcements (or shear connectors) and concrete. Moreover, low temperatures improved the bending, shear, and compression resistances of reinforced concrete (RC) or prestressed concrete structures, but reduced the ductility of RC columns under lateral cyclic loads. Finally, reviews also found that low temperatures improved the compression resistance of concrete‐filled steel tubes using mild, high‐strength, and stainless steels, whereas FTCs and erosion reduced their compression capacity. In addition, low temperatures increased the bending resistance of steel–concrete composite structures, but the FTCs reduced it. The low temperatures bring challenges to the safety and resilience of engineering constructions, which requires careful further studies. Continuous further studies may focus on the durability of materials and the resilience of structures under diverse hazards, including earthquakes, impacts, and even blasts.

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Tests on axial strength of circle CFST stub columns under marine atmosphere in cold region

Cited by 27 publications

References 6 publications

Degradation of Axial Ultimate Load-Bearing Capacity of Circular Thin-Walled Concrete-Filled Steel Tubular Stub Columns after Corrosion

Degradation of Axial Ultimate Load-Bearing Capacity of Circular Thin-Walled Concrete-Filled Steel Tubular Stub Columns after Corrosion

Corrosion effects on axial compressive behavior of steel strapping tensioning technique-confined concrete

Materials and structures at cold‐region and Arctic low temperatures: A state‐of‐the‐art review

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