人行激励下梁板结构与人体耦合作用研究  

DYNAMIC INTERACTION BETWEEN HUMAN AND BEAM-SLAB STRUCTURES UNDER HUMAN WALKING EXCITATION

作　　者：何浩祥[1] 闫维明[1] 张爱林[1] 

机构地区：[1]北京工业大学工程抗震与结构诊治北京市重点实验室,北京100022

出　　处：《振动与冲击》2008年第10期130-133,165,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(50478042);北京市自然科学基金资助重点项目(8041002)

摘　　要：对于重要的梁板结构,应该考虑人行激励下的结构振动以及人体舒适度问题。根据单步落足曲线将人体等效为具有主体部分和耦合质量的时变动力模型,并建立了梁板结构与移动人体相耦合的动力平衡方程及其解析表达式。考虑行走速度和楼板长度等因素,按耦合分析方法对人体与结构的动力响应进行了研究和比较,结果表明人体的自振频率、行走步频和速度是影响结构动力响应和人体的舒适度的重要因素,在梁板结构设计时需要充分考虑上述因素从而有效降低结构振动强度。与等效静力法和不考虑人体耦合作用的动力方法相比,本文提出的动力耦合分析方法更加全面和准确。It is necessary to study structural vibration induced by human walking and human comfort for important flexible beam-slab structures.A time-varying dynamic human model including a main part and coupled masses is established according to different footfall force curves.The dynamic coupled equations for a beam-slab structure and a walking human are also established and their analytical expressions are given.Considering the human walking velocity and the slab length,the dynamic responses of the structure and the human are studied and compared.The results indicate that the human natural frequency,walking frequency and velocity are the most important factors to influence the structural responses and the human comfort.These factors should be considered during design in order to reduce the structural vibration amplitude.Compared with the equivalent static method and the dynamic method without inferactions between human and structure,the dynamic coupled method is more comprehensive and correct.

关 键 词：人行激励 梁板结构 人体动力模型 耦合运动方程 舒适度 

分 类 号：TU973[建筑科学—结构工程]