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随着人行桥跨度的不断增大、新型轻质高强材料的日益运用,人行桥的基频不断降低,其振动及带来的行走舒适性问题也相继日益突出。本文对某人行桥的人致振动进行研究,分析行人激励的规律。在此基础上,把行人激励加载在人行桥上,查看激励响应,结合桥梁固有频率设计TMD并进行TMD减振效果仿真分析计算。通过数据证明TMD在解决人行桥垂向振动方面可取得良好效果。
With the increasing of the span of footbridge and the increasing use of new lightweight and high strength materials, the fundamental frequency of the footbridge has been continuously reduced, and the vibration and the comfort of walking have also become increasingly prominent. This paper studies the vibration of a person who crosses bridge and analyzes the law of pedestrian incentive. On this basis, the pedestrian incentive load on the footbridge, view the excitation response, combined with the natural frequency of the bridge design TMD TMD damping effect simulation analysis and calculation. The data show that TMD can achieve good results in solving the vertical vibration of footbridge.