本文選題：人體-結構相互作用　切入點：雙足步行模型　出處：《建筑結構學報》2014年S1期

【摘要】：基于生物動力學中的雙足步行模型研究人體-結構相互作用,采用Lagrange方程推導人體-結構相互作用系統(tǒng)的運動方程。提出時變阻尼假定,使支撐腳剛接觸地面時人體產生的地面反力為零。通過施加水平控制力的反饋機制保持行走中的步態(tài)穩(wěn)定。采用自編Matlab程序進行數值分析,將基于雙足模型的兩座人行天橋的人體-結構相互作用計算結果與基于時域的外激勵模型的計算結果進行對比。研究結果表明,對于柔度較大的人行天橋,人體-結構相互作用較大,每一步的人體動力響應有所不同,步行中產生的橋面反力也隨著行人向跨中移動而逐漸增大,需要施加更大的水平控制力來保持步態(tài)穩(wěn)定。
[Abstract]:Based on biped walking model in biomechanics, the human-structure interaction is studied, and the motion equation of human-structure interaction system is derived by Lagrange equation.The assumption of time-varying damping is put forward to make the ground reaction of human body zero when the supporting foot is in contact with the ground.Gait stability during walking is maintained by the feedback mechanism of applying horizontal control force.The numerical results of the human-structure interaction of two footbridges based on biped model are compared with those of the external excitation model based on time-domain.The results show that for the footbridge with higher flexibility, the human-structure interaction is greater, and the dynamic response of the human body is different with each step, and the reaction force of the bridge deck generated in the walking step increases gradually with the pedestrian moving toward the middle of the bridge.Greater horizontal control is needed to maintain gait stability.
【作者單位】： 中國電子工程設計院;北京交通大學土木建筑工程學院;
【基金】：國家自然科學基金重點項目(50938008)
【分類號】：TU311.3
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本文編號：1726195