考虑协同特性的人群跳跃下结构振动响应分析  

Analysis on vibration response of structures under crowd jumping considering synergistic characteristics

作　　者：操礼林[1] 宋珺瑜 崔峰 李爱群[2,3] Cao Lilin;Song Junyu;Cui Feng;Li Aiqun(Faculty of Civil Engineering and Mechanics,Jiangsu University,Zhenjiang 212013,China;School of Civil Engineering,Southeast University,Nanjing 211189,China;Beijing Advanced Innovation Center for Future Urban Design,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)

机构地区：[1]江苏大学土木工程与力学学院,镇江212013 [2]东南大学土木工程学院,南京211189 [3]北京建筑大学北京未来城市设计高精尖创新中心,北京100044

出　　处：《东南大学学报（自然科学版）》2024年第6期1464-1471,共8页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金资助项目(12372091,51878319)。

摘　　要：为精准预测人群跳跃激励下大跨楼盖结构的振动响应,研究了人群跳跃荷载协同性因子的概率密度特性,依据单人半正弦平方跳跃荷载模型建立了一种考虑人群协同特性的人群跳跃荷载模型,基于人体生物力学模型计算分析了人群跳跃作用下楼盖结构动力特性参数与加速度响应的变化规律.研究结果表明:相比较于完全同步人群跳跃激励,考虑时间滞后因素的人群跳跃激励下结构振动加速度响应下降显著,其中峰值加速度降幅最高达77.33%;随着人数的增加,人-结构相互作用对结构峰值加速度响应的影响效果更明显,其中9人跳跃激励下楼盖峰值加速度响应降幅最大为6.83%.研究结果可为大跨楼盖结构人致振动响应分析与评估提供借鉴.To accurately predict the vibration response of large-span floor structures under the excitation of crowd jumping,the probability density characteristics of synergistic factor of crowd jumping load were studied.Based on the single half-sine-square jumping load model,a crowd jumping load model considering the crowd synergistic characteristics was established.The variation rule of the dynamic parameters and acceleration response of the floor structure under the action of crowd jumping was calculated and analyzed based on the biomechanical model of the human body.The study results show that compared with the fully synchronized crowd jump excitation,the structural vibration acceleration response decreases significantly under the crowd jump excitation considering the time lag factor,with the peak acceleration reduction reaching as high as 77.33%.The effect of human-structure interaction on the peak acceleration response of the structure is more pronounced with the increase in the number of people,where the relative reduction in the peak acceleration response of the floor structure under the jumping excitation of 9 persons is 6.83%.The results provide reference for the analysis and evaluation of human-induced vibration response of large-span floor structures.

关 键 词：跳跃荷载模型 参数识别 协同性因子 人-结构相互作用 数值模拟 

分 类 号：TU312.1[建筑科学—结构工程]