Earthquake-wind-wave-vehicle-bridge coupling vibration analysis method
A technology of coupled vibration and analysis methods, applied in special data processing applications, instruments, electrical digital data processing, 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., to achieve The effect of conceptual clarity
Active Publication Date: 2021-07-27
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology
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] In order to explain the purpose, technical solutions and advantages of the present invention more clearly, the present invention will be further described below based on specific embodiments and in conjunction with the accompanying drawings.
[0051] combine figure 1 , figure 2 with image 3 , the present invention provides a method for analyzing earthquake-wind-wave-vehicle-bridge coupling vibration, which establishes a dynamic system of a long-span bridge in operation under the action of a sudden earthquake, according to the vehicle and bridge model, vehicle-bridge interaction Action, wind-bridge interaction, wind-vehicle interaction, wave-bridge interaction and the earthquake action on the bridge, establish the earthquake-wind-wave-vehicle-bridge coupling vibration equation; then the earthquake-wind-wave-vehicle- The bridge coupling vibration equation is solved to obtain the dynamic response of the bridge subsystem and the vehicle subsystem; finally, according to ...
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A power system of a large-span bridge in the operation stage under an sudden earthquake action is established, and when the large-span bridge is subjected to the earthquake action, the influence of daily loads such as operation vehicles, wind and waves is considered at the same time. An earthquake-wind-wave-vehicle-bridge coupling vibration equation is established by comprehensively considering vehicle-bridge interaction, wind-bridge interaction, wind-vehicle interaction, wave-bridge interaction and earthquake action borne by a bridge. Vibration equations of a bridge subsystem and a vehicle subsystem are solved by using a numerical integration method through a separation iteration mode, and dynamic responses of the bridge subsystem and the vehicle subsystem are solved, thereby evaluating the safety of a bridge structure and a vehicle running on the bridge. The method is an effective method for evaluating the safety of the bridge structure and vehicles running on the bridge under the sudden earthquake action in the operation stage.
Description
technical field [0001] The invention relates to the technical field of bridge safety, in particular to an analysis method for earthquake-wind-wave-vehicle-bridge coupling vibration. Background technique [0002] With the rapid economic development and increasing traffic demand, more and more long-span bridges have been built along the river and coastal areas. The harsh environment of these bridges not only bears the daily environmental loads such as vehicles, wind and waves, but also faces the threat of extreme seismic loads. These operating loads and extreme loads will directly affect the safety and durability of bridge structures. Due to the suddenness of the earthquake, the vehicles had no time to evacuate the bridge when the earthquake occurred. Therefore, when the earthquake occurred, the long-span bridge was still subjected to normal traffic in addition to the daily environmental load. Therefore, studying the dynamic response of the vehicle-bridge system under the co...
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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