Seismic performance evaluation of large-span offshore cable-stayed bridges under non-uniform earthquake excitations including strain rate effect

Li, Chao; Li, Hong‐Nan; Zhang, Hao; Su, Junsheng; Li, Rou-Han; Ding, YiMing

doi:10.1007/s11431-020-1651-4

Cited by 9 publications

(6 citation statements)

References 35 publications

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“…However, the horizontal vibration of the bridge caused by normal moving vehicles was significantly weaker than the vertical vibration, and the horizontal frequency sensitive to scour cannot be fully excited, which is unfavorable to vibration testing and scour diagnosis. Focusing on this problem, Li et al [72] studied the effect of vehicle braking on bridges, and found that braking action stimulated significant structural longitudinal vibration sensitive to scour. Further, scour diagnosis methods based on braking excitation were proposed and validated via numerical simulation [73,74].…”

Section: Moving Vehicle Excitationmentioning

confidence: 99%

“…Using the above model, Li et al [72] compared the influence of foundation scour on the dynamic response of bridges under two excitation modes of vehicle normal running and braking. A four-span concrete continuous beam bridge with pile foundation and a 29.8 t three-axle truck was used for the numerical study.…”

Section: Scour Diagnosis Based On Dynamic Response Excited By Vehicle...mentioning

confidence: 99%

“…The influence of scour on the bridge dynamic performance varies with the type of foundation, leading to different scour indicators. For shallow foundations, scour removes the soil around the foundation, weakening the horizontal constraint of the soil for the foundation and the stress level of the basement soil, resulting in a decrease in the horizontal and vertical stiffness of the substructure [42,72,73]. Therefore, scour indicators can be constructed using bridge horizontal and vertical modes or vibration.…”

Section: Influence Of Bridge Foundation Type On Scour Diagnosismentioning

confidence: 99%

“…It is noteworthy that scour directly weakens the stiffness of the substructure and indirectly affects the dynamic characteristics of the superstructure. The sensitivity of local pier frequency to scour is significantly higher than that of the overall bridge frequency [71,72,78], but it is more convenient to test the superstructure frequency than the pier frequency, which has led to differences in the selection of scour indicators in existing studies. In conclusion, a two-stage scour diagnosis scheme is proposed.…”

Section: Influence Of Bridge Foundation Type On Scour Diagnosismentioning

confidence: 99%

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A Review of Vibration-Based Scour Diagnosis Methods for Bridge Foundation

et al. 2023

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Foundation scour poses a serious threat to bridge safety in the whole life cycle and leads to many bridge failure incidents. Recently, as an important subfield of bridge structural health monitoring, vibration-based scour diagnosis methods have garnered widespread attention, particularly due to their rapid and low-cost features, which overcomes the difficulties of complex equipment installation associated with the traditional approaches. Recent advances of this method within the last decade are reviewed in this paper. Firstly, the principle of scour diagnosis and vibration excitation methods are introduced. Then, existing qualitative and quantitative studies on scour diagnosis are reviewed, respectively. The former refers to identifying the scour location based on the bridge dynamic characteristics or dynamic response changes, and the latter refers to identifying scour depth based on model updating or machine learning methods. Based on the above review, some important but neglected issues are summarized and discussed in depth, and some challenges and future trends are proposed, including innovative excitation methods, mitigation of environmental conditions interference, soil–structure interaction prediction and application of machine learning techniques.

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Section: Moving Vehicle Excitationmentioning

confidence: 99%

Section: Scour Diagnosis Based On Dynamic Response Excited By Vehicle...mentioning

confidence: 99%

Section: Influence Of Bridge Foundation Type On Scour Diagnosismentioning

confidence: 99%

Section: Influence Of Bridge Foundation Type On Scour Diagnosismentioning

confidence: 99%

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A Review of Vibration-Based Scour Diagnosis Methods for Bridge Foundation

et al. 2023

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“…Many studies on the seismic response of cable-stayed bridges have been conducted around the world [2][3][4][5]. Efthymiou et al [6] considered di erent sources of spatial variability, i.e., incoherence and traveling wave e ect, and carried out the seismic analysis of cable-stayed bridges.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Seismic Response of Long‐Span Special Steel Truss Cable‐Stayed Bridge

Zeng

2022

Advances in Civil Engineering

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Due to the small self-weight of the steel truss cable-stayed bridge with a single tower and a single cable plane, the torsional stiffness and wind stability of the structure are reduced. The arrangement of the deck type makes the mechanical properties of the cable-stayed bridge more complicated while reducing the cost and increasing the aesthetics. The effects of structural parameter variations and traveling wave effects on the seismic response of this steel truss cable-stayed bridge with a single tower and a single cable plane were investigated by the nonlinear time-history analysis method and nonuniform seismic analysis method. The results show that the displacement of the floating system under seismic action is larger than the other three systems, but its internal force is significantly smaller than the other three systems. The spectral characteristics and the duration of ground shaking have a greater influence on the maximum bending moment values corresponding to the height of the cable tower and the maximum axial force values of the main girder bars corresponding to the length of the bridge under earthquake action. The effect of steel truss girder stiffness parameter variations on structural internal forces of bridges and the effect of traveling wave effects on structural displacements of bridges in specific apparent wave velocity intervals do not exist universally.

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Seismic assessment of RC frames infilled with innovative CFS walls considering seismic orientation effect

Liu

2022

Sci. China Technol. Sci.

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Seismic performance evaluation of large-span offshore cable-stayed bridges under non-uniform earthquake excitations including strain rate effect

Cited by 9 publications

References 35 publications

A Review of Vibration-Based Scour Diagnosis Methods for Bridge Foundation

A Review of Vibration-Based Scour Diagnosis Methods for Bridge Foundation

Investigation on Seismic Response of Long‐Span Special Steel Truss Cable‐Stayed Bridge

Seismic assessment of RC frames infilled with innovative CFS walls considering seismic orientation effect

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