Walk Incentive Loads Pedestrian Overpass Vibration Comfort Research

With the high-speed development of city construction, the constant improvement of the living environment, in order to ensure the smooth flow of traffic safety, and pedestrians bsi1978 increasingly appear in the city, modern footbridge structure forms of large span, slender, from complex direction. Pedestrian bridge in the footbridge walk, easy cause excessive vibration bridge over human comfort, may limit, so footbridge structure in safety, must use of its current performance pay enough attention to traffic pollution caused by the vibration of the vibration has been listed as one of the seven wonders of the world environmental pollution.In this context, the incentive to them and load test pedestrian excitation footbridge structure vibration response calculation is strong practical value and meaning. Based on the incentive and load, pedestrian bridge interaction, structural vibration reduction measures, research status and existing problems based on the review of the work, do:First, the incentive mechanism of a load test research, the author introduces a research laboratory test of incentive load test principle, test, test process, the results as sections, by identifying six pedestrian incentive load model corresponds to stop curve, various incentive load model under foot step down, and compares the curve to identify curve and measured curve were compared. Finally, establish incentive amplitude load on foot and pedestrians weight G F ratio of F/G, running incentive load amplitude and pedestrians weight ratio F/G and the specific function relation between writers, fitting out corresponding function relation curves.Then introduces the footbridge induced vibration theory, who. Mainly introduces the theory of forced vibration, the excitedself vibration theory and the random vibration theory, which forced vibration theory respectively discussed individual walking pedestrians and group two modes, self-excitation vibration theory is discussed Dallard Nakamura model and the model. Vibration comfort evaluation of footbridge research process first discussed the design code for countries to avoid footbridge using vibration comfort and problems of the specific requirements, then all scholars of vertical and horizontal bridge bsi1978) to study the assessment of vibration comfort has made a profound discussion.The footbridge induced vibration assessment person case study, this paper introduces the phase ii project of Shanghai pudong international airport, a boarding bridge example and gulf bridge connecting engineering at Qingdao haier road pedestrian overpass examples of engineering survey, then use generic structure analysis and design of the two SAP2000 software the footbridge structure dynamic analysis and pedestrian incentive load, and the time-history analysis of footbridge vibration comfort is evaluated.