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根据对几座斜拉索人行天桥的观测发现,当大量行人通过天桥时,可在桥支架上引起频率大约为1.0Hz的侧向振动。行人的曲线运动会导致侧向动力,从而引起桥支架的振动。一旦大桥开始振动,一些行人便开始与支架共振,从而进一步增加了支架反应。试验主要为寻找行人在振动桥面上所产生的动态力。行人走在振动台上专门设计的钢板上,振动台有着不同的频率和振幅。试验结果表明,行人产生的动力会随着振动台的振幅而增加。行人的同步自振也同时被测量。
Based on observations of several stay-cables pedestrian bridges, it was found that when a large number of pedestrians cross the flyover, lateral vibration of about 1.0 Hz in the bridge support can be induced. The pedestrian’s curve motion results in lateral power, causing the bridge support to vibrate. Once the bridge starts to vibrate, some pedestrians begin to resonate with the stent, further increasing the stent response. The main purpose of the test is to find the dynamic forces generated by pedestrians on the bridge deck. Pedestrians walk on specially designed steel plates on shakers, which have different frequencies and amplitudes. The experimental results show that the power generated by pedestrians increases with the amplitude of the shaker. Pedestrian synchronization is also measured simultaneously.