Highway random traffic flow wind-vehicle-bridge coupling computation method

Abstract

The invention belongs to the technical field of construction and traffic bridges, and more particularly relates to a highway random traffic flow wind-vehicle-bridge coupling computation method. According to the method, traffic load of a typical road section is investigated by use of a traffic information acquisition system and dynamic bearing equipment; vehicle models in practical traffic load are classified according to an investigation result, a dynamic analysis model of each vehicle model is established, and motion equations of different vehicle models are deduced by use of different principles, so that a mass, rigidity and damping matrix is formed; a geometrical and mechanic coupling relation between the vehicle and the bridge system is established according to different beam unit analysis models, a vehicle bridge coupling random vibration analysis system is created, so that programmed vehicle bridge coupling computation is realized; and according to investigation of practical traffic load, a vehicle dynamic analysis model of each typical vehicle is established so as to form a complete analysis model bank, and the motion equation of each type of vehicle is established, so that vehicle bridge system dynamic response is computed and analyzed precisely.

Description

technical field [0001] The invention belongs to the technical field of construction and traffic bridges, and in particular relates to a coupling calculation method for windmill bridges with random traffic flow on highways. Background technique [0002] Vehicle-bridge coupling dynamics in windy environment is an aspect that needs to be considered in bridge design. With the rapid development of my country's economy, more and higher requirements are put forward for the transportation industry. The increase in vehicle types and vehicle speeds, the increase in vehicle load, and the increase in traffic density make vehicles run on bridge structures. The vibration effect on the bridge is becoming more and more obvious, and the mutual influence between the vehicle and the bridge is becoming more and more prominent. [0003] The analysis models used in the study of windmill-bridge coupling problems at home and abroad are all multi-degree-of-freedom analysis systems composed of vehicl...

AI Technical Summary

Problems solved by technology

In the vehicle-bridge coupling system, road surface roughness and vehicle parameters are relatively important influencing factors, but in the existing research, the consideration of the road surface condition is not sufficient, and the existing highway bridge vehicle-bridge coupling vehicle dynamic analysis model is relatively It is relatively simple, the coverage is relatively narrow, and it cannot cover the typical vehicles driving on highway bridges at all.

Using this single vehicle dynamic analysis model to analyze the dynamic response of the bridge structure under the action of vehicle loads will inevitably produce relatively large deviations, so that the performance and safety of the designed and constructed bridges under the action of actual traffic flow in the future will have great differences. The problem

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