An analysis method of earthquake-wind-wave-vehicle-bridge coupled vibration
A technology of coupled vibration and analysis methods, applied in the directions of instrumentation, geometric CAD, design optimization/simulation, etc., can solve problems such as inaccurate dynamic response of bridges, failure to properly consider the effects of operational wind loads and wave loads, etc., and achieve a clear concept Effect
Active Publication Date: 2022-01-18
SOUTHWEST JIAOTONG UNIV
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Similarly, most of the existing bridge seismic studies only considered the seismic action on the bridge structure without properly considering the effects of operational wind loads and wave loads, resulting in inaccurate bridge dynamic responses
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[0050] The invention will be further described with reference to the specific embodiments, and will be further illustrated by the specific embodiments.
[0051] Combine figure 1 , figure 2 and image 3 The present invention provides an seismic-wind-wave-car-bridge coupled vibration analysis method, which has established a power system that operates large across bridges under sudden earthquake action, according to vehicle and bridge model, car-bridge mutual Role, wind-bridge interaction, wind-car interaction, wave-bridge interaction, earthquake effect, earthquake, earthquake - wind-wave-car-bridge coupled vibration equation; then on earthquake - wind - wave - car - Bridge coupled vibration equation is evolved to obtain a dynamic response of a bridge subsystem and a vehicle subsystem;
[0052] The vehicle model includes several rigid body, damper, spring, suspension system, and axle, the vehicle model simulates the vehicle model as a mass-spring-damping system; the bridge model is es...
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The present invention establishes a dynamic system of a long-span bridge under the action of a sudden earthquake in the operation stage, and simultaneously considers the influence of daily loads such as operating vehicles, wind and waves, etc. when the long-span bridge is subjected to an earthquake. By comprehensively considering the vehicle-bridge interaction, wind-bridge interaction, wind-vehicle interaction, wave-bridge interaction and the seismic action on the bridge, the earthquake-wind-wave-vehicle-bridge coupling vibration equation is established. The numerical integration method is used to solve the vibration equations of the bridge subsystem and the vehicle subsystem respectively by means of separation and iteration, and the dynamic responses of the bridge subsystem and the vehicle subsystem are obtained, so as to evaluate the safety of the bridge structure and the vehicles driving on the bridge. This method provides an effective method for evaluating the safety of bridge structures and vehicles on bridges under sudden earthquakes during the operation phase.
Description
Technical field [0001] The present invention relates to the field of bridge security, in particular to a seismic - air - wave - Vehicle - bridge coupled vibration analysis. Background technique [0002] With the rapid economic development and growing traffic demand, and coastal areas along the river have been built more and more long-span bridges. The harsh environment in which these bridges, not only to withstand the daily role of environmental loads of vehicles, such as wind and waves, while also facing the threat of extreme seismic loads. These extreme operational loads and loads of action will directly affect the safety and durability of bridge structures. Since the earthquake is sudden vehicle at time of its occurrence too late to evacuate the bridge, so that when an earthquake occurs, in addition to long-span bridges subjected to daily environmental load, the bridge still maintains normal traffic. Therefore, the study car - power bridge system in daily operations under the ...
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IPC IPC(8): G06F30/23G06F30/13G06F119/14
CPCG06F30/23G06F30/13G06F2119/14
Inventor 朱金郑凯锋王亚伟冯霄暘
Owner SOUTHWEST JIAOTONG UNIV