人群集度荷载模型及人致振动模拟分析  

Crowd density load model and analysis of crowd-induced vibration

作　　者：杨娜[1] 邱雪[1,2] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]北京城建集团设计发展集团股份有限公司,北京100037

出　　处：《北京交通大学学报》2016年第3期88-96,共9页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家自然科学优秀青年基金项目资助(51422801);北京市自然科学基金重点项目资助(8151003);中央高校基本科研业务费专项资金资助(2012JBM007)

摘　　要：针对大跨度楼板的人致振动问题,选取北京南站二层候车厅大跨度楼板作为研究对象.基于理想数学模型条件设定假设和等效荷载模型,改进并完善了2种适用于大跨度楼盖的人群荷载模型:人体步态参数服从概率分布的随机概率分布人群荷载模型,以及与交通学和生物学研究成果紧密结合的具有预测性的人群集度荷载模型.通过对比分析北京南站候车厅大跨度楼板在3种人群荷载模型作用下的结构振动响应情况,确定各荷载模型的适用范围并分析各自优缺点.结果表明:人群集度荷载模型对结构在人群荷载作用下加速度响应具有预测性,适用工况范围广.与传统的等效荷载模型相比,采用随机概率分布荷载模型作为结构激励荷载适合用来模拟人群自由行走工况.运用等效荷载模型及人群集度荷载模型模拟人群排队进站荷载工况得到的分析响应结果较为合理.In order to build suitable crowd-induced load models that are more applicable on large-span floor of waiting hall and study the crowd-induced vibration features of the large-span waiting hall the largespan waiting hall of Beijing South Railway Station is taken as the study object.On the basis of the hypothesis setting upon ideal mathematical model and the common equivalent crowd-induced load model,the paper simplifies the stochastic crowd load model,which considers the probability distribution of human gait parameters.And on the basis of the research results in transportation and biological fields by Venuti and Bruno,the predictive crowd load model is generated.Finally,through comparing and analysing the vibration responses of the floor of large-span waiting hall under different load models,the merits and demerits and the application scopes of each method are discussed.The crowd-density load model has good predictability to the acceleration response of structure and wide scope of application.Compared with traditional equivalent load model,the stochastic crowd load model is more suitable in simulating the free walking condition.The equivalent load model and the predictive crowd density load model are rational in simulating the crowd queuing condition.

关 键 词：人群荷载模型 人致振动 大跨度楼板 北京南站 

分 类 号：TU312.1[建筑科学—结构工程]