摘要
基于人-结构耦合振动,对某钢结构连廊的人致振动舒适度进行评估,并对其产生的过量振动进行减振控制。为了考虑人-结构耦合作用,将单自由度体系的人体动力学模型与傅立叶级数人行荷载模型组合代表单个行人荷载。利用ANSYS建立大跨钢结构连廊的有限元模型,并采用APDL编程将行人荷载分别以定点加载、单步移动加载及人群同步移动加载等不同工况加载于有限元模型中,对比分析不同工况下考虑人-结构耦合振动前后连廊的加速度响应,同时以峰值加速度作为指标评估该钢结构连廊的振动舒适度,并选用单个调谐质量阻尼器(TMD)对连廊的过量振动进行减振控制。结果表明:对大跨连廊结构进行人致振动舒适度评估时,应考虑人群-结构耦合振动;TMD能有效控制大跨连廊结构的人致过量振动。
Based on the human-structure coupled vibration,the human-induced vibration comfort of a steel structure corridor was evaluated and the excessive vibration generated was controlled.In order to consider the human-structure coupled effect,the human body dynamic model of the single-degree-of-freedom system and the Fourier series pedestrian load model were combined to represent a single pedestrian load.The finite element model of the long-span steel structure corridor was established by using ANSYS,programming APDL was used to load the pedestrian load into the finite element model in different working conditions such as fixed-point loading,single-step moving loading and crowd synchronous moving loading,the acceleration responses between with and without considering the human-structure coupled vibration were contrasted and analyzed.At the same time,the peak acceleration was taken as the index to evaluate the vibration comfort of the steel structure corridor,and a single tuned mass damper(TMD)was selected to control the excessive vibration of the corridor.The results show that the population-structure coupling vibration should be considered when evaluating the human-induced vibration comfort of the large-span corridor structure;TMD can effectively control the human-induced excessive vibration of the large-span corridor structure.
作者
惠晓丽
朱前坤
张琼
蒲兴龙
HUI Xiaoli;ZHU Qiankun;ZHANG Qiong;PU Xinglong(Institute of Earthquake Protection and Disaster Mitigation,Lanzhou University of Technology,Lanzhou 730050,China;Western Center of Disaster Mitigation in Civil Engineering of Ministry of Education,Lanzhou University of Technology,Lanzhou 730050,China)
出处
《建筑结构》
CSCD
北大核心
2020年第14期120-125,109,共7页
Building Structure
基金
国家自然科学基金资助项目(51508257,51668042,51868046)。
关键词
大跨连廊
人体动力学模型
振动舒适度
人致振动
振动控制
large-span corridor
human body dynamic model
vibration comfort
human-induced vibration
vibration control
