基于自激励人体模型的人-结构竖向相互作用研究

谢伟平 1, 冯金鹏 1, 何卫 2

振动与冲击 ›› 2017, Vol. 36 ›› Issue (21) : 28-33.

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (21) : 28-33.
论文

基于自激励人体模型的人-结构竖向相互作用研究

  • 谢伟平 1, 冯金鹏 1, 何卫 2
作者信息 +

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

  • XIE Wei-ping 1  FENG Jin-peng 1  HE Wei 2
Author information +
文章历史 +

摘要

基于自激励人体模型,建立了考虑人-结构竖向相互作用下行人过桥运动方程,提出了考虑步频主谐和亚谐分量的单人步行力模型,并通过单人过桥试验对该模型进行了验证;分析了人-桥竖向相互作用的变化规律及影响因素。结果表明,人体步频亚谐可能与结构的基频相近,从而引起较大的结构响应;结构固有频率和人/结构质量比对人-结构相互作用影响较大,当结构频率与步频及其主谐波分量频率接近时,耦合效应最显著,其对人体足底力影响最大。随着人/结构质量比的增加,人-结构相互作用逐渐增强。

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.   

关键词

人致振动 / 竖向人体动力学模型 / 人-结构相互作用 / 足底力

Key words

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

引用本文

导出引用
谢伟平 1, 冯金鹏 1, 何卫 2. 基于自激励人体模型的人-结构竖向相互作用研究[J]. 振动与冲击, 2017, 36(21): 28-33
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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