Shear capacity of H-shaped steel beam with randomly located pitting corrosion

Zhao, Zhongwei; Tang, Lumeng; Zhang, Ni; Cai, Qi; Mo, Shengjie; Li, Bing

doi:10.1016/j.apor.2021.102851

Cited by 15 publications

(4 citation statements)

References 18 publications

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“…For an in-service building structure, the failure probability is about 10 -5 , and then, when the sampling number is 10 7 , it can be guaranteed that the error is less than 20% with a confidence level of 95% [26,32]. Consequently, the number of samples used in the subsequent study of this paper was 3*10 7 , and when the failure probability has been determined, the corresponding reliability index can be deduced from the standard normal distribution.…”

Section: Calculation Methodsmentioning

confidence: 93%

Residual Life Prediction and Design Correction Method of Corroded Circular Steel Tubes Based on Time-Varying Reliability

2024

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Current research on the effects of corrosion on the safety of steel members is primarily focused on the degradation of the ultimate bearing capacity, and there is a lack of research on the reliability-based service life assessment. In this paper, a modified reliability function and an uncertainty model for each parameter considering the effects of corrosion are established based on the reliability analysis method of the GB50068-2018 design specification. The effects of the corrosive environment category, wall thickness, and slenderness ratio on the time-varying reliability of axially compressed round tubes are analyzed. The results indicate that an increase in the corrosion duration and the environmental category can cause a decrease in the reliability index of the component, and the smaller the wall thickness, the faster the corrosion-related degradation of the reliability index. However, with the increase of the slenderness ratio, the corrosion-related degradation of the reliability index gradually decreases. In the end, a residual life prediction method and a design correction method for corroded components based on the reliability index are proposed. Moreover, the values of the corrosion life and corrosion coefficient of circular steel tubes for different environmental categories, slenderness ratios, and thicknesses are determined. This paper provides a technical reference for the residual life prediction and full life design of round steel tubes considering local corrosion.

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Section: Calculation Methodsmentioning

confidence: 93%

Residual Life Prediction and Design Correction Method of Corroded Circular Steel Tubes Based on Time-Varying Reliability

2024

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“…For example, for a composite H-beam composed of an H-beam and glulam 5 , limit state analysis was used to analyze the load–displacement hysteresis curve, and it was found that the ductility of the composite H-beam was 138% higher than that of the conventional H-beam. Some researchers have also studied the seismic performance of H-beams after corrosion 6 , shear force of steel beams 7 , and axial compressive bearing capacity 8 and found that the higher the degree of corrosion, the worse the seismic performance. The weaker the beam’s shear force, the lower the axial compressive bearing capacity.…”

Section: Introductionmentioning

confidence: 99%

Piezoelectric ceramic sensor-based structural health monitoring of diagonally braced H-shaped steel structures

Wu,

Xiao,

Zhu

2023

Sci Rep

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In this study, we propose a piezoelectric ceramic sensor-based health monitoring method to monitor the stress state of diagonally braced H-shaped steel structures. Loading experiments were carried out on diagonally braced H-shaped steel under different working conditions. Subsequently, the amplitude and energy of piezoelectric signals under these two working conditions were compared and analyzed, and finite element analysis was performed using ABAQUS software to verify the results. The experimental results showed that with an increase in the web height or load, the time-domain waveform energy index of the H-shaped steel increased. Under different working conditions, such as a diagonally braced H-shaped steel member with a web height of 10 cm, when the pressure value was less than 10 N/mm2, the energy index increased by approximately 15.98% for every 1 N/mm2 increase in the pressure. When the pressure value was greater than 10 N/mm2 and less than 15 N/mm2, the energy index increased by approximately 1% for every 1 N/mm2 increase in pressure. Further, the energy index increased by approximately 8.4% for every 1 cm increase in the height of the web. Simultaneously, it can be seen from the results of the finite element analysis that the stress and strain at the induction position of the piezoelectric ceramic sensor increased with an increase in the external pressure. The study of structural health monitoring for diagonally braced H-shaped steel structures holds significant importance in ensuring the safety and reliability of these structures, achieving predictive maintenance, evaluating structural performance and energy efficiency, and optimizing structural maintenance.

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“…Steel structures may be damaged by environmental erosion, natural disasters, improper operation, and load and human factors during long-term use. [ 1 , 2 ]. The damage reduces the bearing capacity and durability of the structure and may even lead to failure.…”

Section: Introductionmentioning

confidence: 99%

Flexural Behavior on Damaged Steel Beams Strengthened with CFRP Sheets Subjected to Overloading

2022

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This paper presents results of testing and numerical analyses of damaged steel beams strengthened with carbon-fiber reinforced polymer (CFRP) sheet and subjected to overloading. The test results showed that as cyclic times increase, the yield load and stiffness increase, but the ultimate bearing capacity decreases to a certain extent. Applying prestress could improve the ductility of the girder. The damage level greatly influenced the girders with overloading, and the increase in damage degree reduced the stiffness, yield load and ultimate load. The numerical calculation showed that the yield load would decrease by 0.4–0.8 kN when the cyclic times increase by 100 times. The yield load would increase by 1–2 kN and the ultimate bearing capacity would decrease by 0.6–1.2 kN when the overloading amplitude increased by 0.02 Pu. The increase in damage degree would obviously reduce the yield load and ultimate bearing capacity of the steel beam after overloading. The yield load and ultimate bearing capacity could be increased by approximately 3 kN when the CFRP sheet thickness increases by 0.05 mm.

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Shear capacity of H-shaped steel beam with randomly located pitting corrosion

Cited by 15 publications

References 18 publications

Residual Life Prediction and Design Correction Method of Corroded Circular Steel Tubes Based on Time-Varying Reliability

Residual Life Prediction and Design Correction Method of Corroded Circular Steel Tubes Based on Time-Varying Reliability

Piezoelectric ceramic sensor-based structural health monitoring of diagonally braced H-shaped steel structures

Flexural Behavior on Damaged Steel Beams Strengthened with CFRP Sheets Subjected to Overloading

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