Human–structure dynamic interaction in footbridges
Human–structure dynamic interaction in footbridges
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DOI：
10.1680/bren.2005.158.4.165
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发表时间：
2005-12
期刊：
影响因子：
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通讯作者：
S. Z̆ivanović;A. Pavic;P. Reynolds
中科院分区：
文献类型：
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作者：
S. Z̆ivanović;A. Pavic;P. Reynolds
由一个人步行通过人行桥结构在垂直方向上引起的动荷载通常被建模为谐振谐力。由该谐波力和在跑步机上测得的行走力产生的模态响应之间的比较证实，使用谐波力是合理的情况下，步行穿过的结构，不明显振动。它进一步表明，使用这个谐波力预测的响应，可感知的振动人行桥可以显着高估的真实的人行桥的响应，因此，它的活泼程度。这是因为行人在感受到强烈的振动时无法保持稳定的步伐。系统的测量和模拟响应的比较的方法，提出了识别振动水平，干扰正常行走的目的。在调查的两座人行桥上，该水平为0.33 m/s2和0.37 m/s2，在这两种情况下都低于...
Dynamic load induced in the vertical direction by a single person walking across a footbridge structure is usually modelled as a resonant harmonic force. A comparison between modal responses generated by this harmonic force and a walking force measured on a treadmill confirmed that using the harmonic force is justifiable in the case of walking across a structure that does not vibrate perceptibly. It is further shown that using this harmonic force for predicting the response of a perceptibly vibrating footbridge can significantly overestimate the real footbridge response and therefore its degree of liveliness. This is because of the inability of pedestrians to keep pacing steadily when perceiving strong vibrations. A methodology for systematic comparison of the measured and simulated responses is proposed with the aim of identifying vibration levels which disturb normal walking. On two footbridges investigated this level was 0·33 m/s2 and 0·37 m/s2, in both cases being lower than the levels allowed by the ...