Grading Evaluation of Overall Corrosion Degree of Corroded RC Beams via SMFL Technique

Zhang, Zeyu; Ma, Xiaotao; Jiang, Hejing; Tong, Kai; Zheng, Yu; Zhou, Jianting

doi:10.1155/2023/6672823

Cited by 15 publications

(7 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Finally, the ultrasonic wave displacement field at each point within the material can be obtained by simultaneously solving Equation (5) through Equation (7).…”

Section: The Excitation Mechanism Of Laser Ultrasonicsmentioning

confidence: 99%

“…Destructive testing, which can harm the integrity of the bridge, is not ideal for regular checks [5,6]. Consequently, the non-destructive testing/dynamic monitoring approaches of stress in steel structures, including ultrasonic and magnetic flux leakage testing, along with the corresponding artificial intelligence algorithms, have become the primary focus of research [7][8][9][10]. Ultrasonic testing, in particular, has widespread application, but its effectiveness is hampered by the need for direct contact and couplants, which can affect measurement sensitivity and accuracy [11,12].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Research on the Method of Absolute Stress Measurement for Steel Structures via Laser Ultrasonic

Tian,

Kong,

Liu

et al. 2024

Buildings

View full text Add to dashboard Cite

Accurate measurement of the stress in steel structures is crucial for structural health monitoring. To achieve this goal, a novel technique, the laser ultrasonic technique, was used in absolute stress measurement in this study. The feasibility of this technique has been verified through theoretical analysis and finite element (FE) analysis. A stress measurement experiment in steel specimens was conducted and the relationship between ultrasonic relative wave velocity and stress was explored. The results revealed that there is a similar linear correlation between the ultrasonic relative wave velocity and absolute stress. The stress can be obtained based on ultrasonic relative wave velocity. According to the stress measurement results, it was found that the absolute error between the measured stress and theoretical stress was largest when the stress level was low, and that the measured error of stress gradually decreased with increases in the applied stress. The relative error between the measured stress and the theoretical stress was within 10% when the stress was higher than 100 MPa. This further verifies the reliability of the laser ultrasonic technique under high-stress conditions. Additionally, the impact of temperature and surface roughness on stress measurement was analyzed. The stress error in stress measurement increased similarly linearly with the increase in temperature and increased non-linearly with the increase in roughness. The corresponding compensation methods were proposed to effectively improve the accuracy of measurement.

show abstract

“…Finally, the ultrasonic wave displacement field at each point within the material can be obtained by simultaneously solving Equation (5) through Equation (7).…”

Section: The Excitation Mechanism Of Laser Ultrasonicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Research on the Method of Absolute Stress Measurement for Steel Structures via Laser Ultrasonic

Tian,

Kong,

Liu

et al. 2024

Buildings

View full text Add to dashboard Cite

show abstract

“…This may not only affect the usability and comfort of the bridge but also pose a threat to the structural safety of the bridge. To analyze the influence of the changes in structural parameters on the dynamical properties of the bridge, the rigidity of the steel truss, the rigidity of the cable, the stiffness of the pylon, and the position of the auxiliary pier have changed now [28][29][30][31][32][33][34][35][36][37][38]. For the convenience of illustration, the first 10 order modes of the bridge are numbered as M1~M10.…”

Section: Sensitivity Analysis Of the Fem Parametersmentioning

confidence: 99%

Study on Dynamic Characteristics of Long-Span Highway-Rail Double-Tower Cable-Stayed Bridge

Guo,

Jiang,

Zhang

et al. 2024

Buildings

View full text Add to dashboard Cite

The long-span dual-purpose highway-rail double-tower cable-stayed bridge has the characteristics of a large span and large load-bearing capacity. Compared with the traditional cable-stayed bridge, its wind resistance and seismic resistance are weaker, and the dynamic characteristics of the bridge are closely related to the wind resistance and seismic bearing capacity of the bridge. This study investigated the influence of the variations of bridge member parameters on the dynamic characteristics of the bridge and then improved the dynamic characteristics of the bridge. To provide the necessary experimental theory for the research work of the long-span dual-purpose highway-rail double-tower cable-stayed bridges, this paper takes the world’s longest span of the dual-purpose highway-rail double-tower cable-stayed bridge as the background, using the finite element analysis software Midas Civil 2022 v1.2 to establish a three-dimensional model of the whole bridge by changing the steel truss beam stiffness, cable stiffness, pylon stiffness, and auxiliary pier position, as well as study the influence of parameter changes on the dynamic characteristics of the bridge. The results show that the dynamic characteristics of the bridge can be enhanced by increasing the stiffness of the steel truss beam, the cable, and the tower. The stiffness of the steel truss beam mainly affects the transverse bending stiffness and flexural coupling stiffness of the bridge. The influence of cable stiffness is weak. The tower stiffness can comprehensively affect the flexural stiffness and torsional stiffness of the bridge. The position of auxiliary piers should be determined comprehensively according to the site conditions. In practical engineering, the stiffness of components can be enhanced according to the weak links of bridges to improve the dynamic characteristics of bridges and save costs.

show abstract

“…HRB400 rebar is widely used in engineering projects. Rebar is a common ferromagnetic material with magnetoelastic effect [38,39]. The length of the sensor was 80 mm.…”

Section: Sensor and Specimen Preparationmentioning

confidence: 99%

Working Stress Measurement of Prestressed Rebars Using the Magnetic Resonance Method

et al. 2023

View full text Add to dashboard Cite

Prestressed rebars are usually used to apply vertical prestress to concrete to prevent web cracking. The reduction of working stress will affect the durability of the structure. However, the existing working stress detection methods for prestressed rebars still need to be improved. To monitor the working stress of rebars, a magnetic resonance sensor was introduced to carry out experimental research. The correlation between rebar stress and the sensor’s induced voltage was theoretically analyzed using the magnetoelastic effect and magnetic resonance theory. A working stress monitoring method for prestressed rebars based on magnetic resonance was proposed. Working stress monitoring experiments were carried out for 16 mm, 18 mm, and 20 mm diameter rebars. The results showed that the induced voltage peak-to-peak value and the rebar prestress were nonlinearly correlated under different working conditions. Correlations between the characteristic indicators and the rebar working stress were obtained using nonlinear and linear fit. The cubic polynomial segmented fit outperformed the gradient overall linear fit, with the goodness of fit R2 greater than 0.96. The average relative error values of working stress monitoring were less than 5% under different working conditions. This provides a new method for working stress measurement of vertical prestressed rebars.

show abstract

Grading Evaluation of Overall Corrosion Degree of Corroded RC Beams via SMFL Technique

Cited by 15 publications

References 38 publications

Research on the Method of Absolute Stress Measurement for Steel Structures via Laser Ultrasonic

Research on the Method of Absolute Stress Measurement for Steel Structures via Laser Ultrasonic

Study on Dynamic Characteristics of Long-Span Highway-Rail Double-Tower Cable-Stayed Bridge

Working Stress Measurement of Prestressed Rebars Using the Magnetic Resonance Method

Contact Info

Product

Resources

About