Vehicle-bridge-storm flow coupling vibration analysis method for road-railway bridge

Abstract

The invention discloses a vehicle-bridge-storm flow coupling vibration analysis method for a road-railway bridge. According to the method, a vehicle subsystem, a bridge subsystem and a storm flow coupling field subsystem serve as a unified system by adopting a large system thought. According to static and dynamic interaction among the subsystems and a displacement coordination relationship betweenthe vehicle subsystem and the bridge subsystem, a vehicle-bridge-storm flow coupling vibration equation of the road-railway bridge is established; and by adopting a separated iterative method, dynamic responses of the vehicle subsystem and the bridge subsystem are solved, thereby evaluating running safety and comfort of vehicles and trains passing the road-railway bridge under the action of a storm flow coupling field. The dynamic effects of the vehicles and the trains can be considered at the same time; the static and dynamic effects and the aeroelastic and hydroelastic feedback effects of the storm flow coupling field on the vehicle subsystem and the bridge subsystem can be considered at the same time; and an effective method is provided for driving safety evaluation of the cross-sea road-railway bridge.

Description

technical field [0001] The invention relates to the technical field of disaster prevention and reduction in bridge engineering, in particular to a vehicle-bridge-wind-wave-flow coupling vibration analysis method for road-rail dual-purpose bridges. Background technique [0002] Since the 21st century, the bridges of the world have entered a new era of building cross-sea and island projects. my country has successively built sea-crossing bridges such as the East China Sea Bridge, the Hangzhou Bay Bridge, and the Qingdao Bay Bridge. At present, the Hong Kong-Zhuhai-Macau Bridge is about to be completed and opened to traffic. The Dalian Bay Bridge, the Six-Span Sea-Crossing Bridge, and the Shenzhen-Central Channel Project have started construction. The giant cross-sea channel project across the Qiongzhou Strait and the Bohai Strait is under planning and research. Internationally, countries around the world are also speeding up the planning and research of large-scale cross-sea ...

AI Technical Summary

Problems solved by technology

At the end of August 2005, Hurricane Katrina slammed into the Gulf Coast, destroying engineering infrastructure in Louisiana, Mississippi, and Alabama along the Gulf Coast, severely damaging highway bridges, paralyzing traffic in large areas, and hampering relief efforts. Caused enormous hardship, displaced more than 250,000 people, killed more than 1,000, and caused economic losses of more than $100 billion

At present, the research on vehicle-bridge-wind-wave-current coupling vibration analysis method is still blank

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