Influence of the turbulence conditions of crosswind on the aerodynamic responses of the train when running at tunnel-bridge-tunnel

Comparison of aerodynamic performance of high-speed train driving on tunnel-bridge section under fluctuating winds based on three turbulence models

Deterioration of aerodynamic performance of a train driving through noise barriers under crosswinds

With the increase of bridge-required demolition/dismantling for reconstruction or modification, the early warning of construction emergencies is greatly needed for monitoring the structural safety of bridges under construction. In this paper, based on the multi-source data of nearby construction and demolition construction of a large-span RC arch bridge in China, the Analytic Hierarchy Process (AHP) method is adopted to analyze the multi-source data and set the early warning threshold for bridge safety in construction. According to the analytical results, a reasonable evaluation of AHP factors can improve the accuracy and timeliness of safety early warning in the structural safety monitoring of bridges during the construction process. The weight of the monitoring data in AHP should be assigned according to its reliability, stability, and importance. Bridge safety assessment of nearby construction having harmful vibration should prioritize dynamic bridge monitoring by cooperating with multi-source data, including stress, and deformation monitoring of the bridge is necessary. The assessment results proved that multi-source data, including but not limited to structural stress and deformation monitoring data, vibration data, theoretical prediction data, environment data such as temperature data, and construction/maintenance history data, are necessary for safety monitoring and early warning of construction with specifications related to bridge construction. The early warnings triggered by the evaluation results successfully ensure the safety status of the bridge during nearby construction and demolition construction, which shows the proposed method can provide a guideline for comprehensively evaluating and early warning of the status of bridge construction.

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Research on the Application of Multi-Source Data Analysis for Bridge Safety Monitoring in the Reconstruction and Demolition Process

Key Construction Technology and Monitoring of Long-Span Steel Box Tied Arch Bridge

Protective effect of railway bridge wind barriers on moving trains: An experimental study

Inclined single-tower self-anchored suspension bridges feature a high adaptability to geological conditions but involve complicated structural behaviors during construction due to system t...

Construction Monitoring of Self-Anchored Suspension Bridge with Inclined Tower

The Lanzhou-Xinjiang High-speed Railway runs through a region of over 500km that is amenable to frequent winds. The strong wind and rainfall pose a great threat to the safe operation of high-speed ...

Dynamic Response of High-Speed Train-Track-Bridge Coupling System Subjected to Simultaneous Wind and Rain

The invention discloses orthotropic steel bridge deck fatigue crack detection equipment which comprises a walking assembly and a detection platform assembly, the walking assembly comprises a driving walking mechanism, a driven walking mechanism and a third driving mechanism, and the driving walking mechanism and the driven walking mechanism are each of an arc-shaped structure; electromagnets are arranged at the tops of the two ends of the driving walking mechanism and the driven walking mechanism, a transmission shaft of the third driving mechanism penetrates through the driven walking mechanism and then is in threaded connection with the driving walking mechanism, and when the third driving mechanism drives the transmission shaft to rotate, the driving walking mechanism can get close to or get away from the driven walking mechanism. The orthotropic plate fatigue crack is automatically detected by carrying a phased array ultrasonic detector, meanwhile, in the moving process of the orthotropic plate fatigue crack on the orthotropic steel bridge deck, the vibration of the equipment can be reduced, and the detection accuracy is improved.

Bing Han

Papers

Protective effect of railway bridge wind barriers on moving trains: An experimental study

Construction Monitoring of Self-Anchored Suspension Bridge with Inclined Tower

Dynamic Response of High-Speed Train-Track-Bridge Coupling System Subjected to Simultaneous Wind and Rain

Orthotropic steel bridge deck fatigue crack detection equipment and use method thereof

Aerodynamic impact of train-induced wind on a moving motor-van