Research on vertical human-structure interaction based on self-exciting human model

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (21) : 28-33.

XIE Wei-ping 1 FENG Jin-peng 1 HE Wei 2

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Abstract

Based on the self-exciting human model, the motion equation of footbridge was established with considering the vertical human-structure interaction and the walk force model was proposed with considering main harmonic and subharmonic frequency of walking. This model was verified by measuring footbridge vibration response caused by single person walking and the variation law of vertical human-structure interaction and its influencing factors were analyzed. The result indicates that walking subharmonic frequency may be close to the fundamental frequency of structures, resulting in large structural response. The natural frequency of structures and human/structure mass ratio have a great influence on human-structure interaction. When the structure frequency is similar to walking frequency and main harmonic components, the coupling effect is significant, and it has the greatest impact on footfall force. Moreover, with the increasing of human/structure mass ratio, the interaction will strengthen gradually.

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human-induced vibration / vertical human dynamic model / human-structure interaction / footfall force

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XIE Wei-ping 1 FENG Jin-peng 1 HE Wei 2. Research on vertical human-structure interaction based on self-exciting human model[J]. Journal of Vibration and Shock, 2017, 36(21): 28-33

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