摘要
近年来,各地纷纷兴建大型火车站房,这类建筑中的楼盖大多为大跨、轻质和低阻尼结构,本文基于人体舒适度考虑,对这些大跨楼盖进行振动舒适度的分析。首先,建立某大型火车站房的整体有限元模型,研究这类建筑中大跨楼盖的振动特性;随后,对楼盖在各种不利工况人群荷载作用下的振动舒适度进行分析;最后,在已有研究的基础上,提出了大跨楼盖多重调谐质量阻尼器(Multiple Tuned Mass Dampers,简称MTMD)减振设计方法。结果表明,利用该方法设计MTMD减振系统,可以有效地控制大跨楼盖的竖向振动,各工况下的平均减振率可达34%,从而使结构在使用时满足人体舒适度的要求。
In recent years,the large station rooms were built all around the country,and most of the floors in these structures have the properties of long-span,light weight and low damping.Based on the consideration of human comfort,these floors are analyzed on its vibration serviceability.Firstly,a finite element model of a large station room is established,and the vibration properties of the long-span floors in this structure are studied.Secondly,the vibration serviceability of the floor structure caused by some disadvantageous cases is analyzed.Finally,a design method with multiple tuned mass dampers（MTMD） system is presented.The study results show that the MTMD system can control the vertical vibration of the long-span floor effectively,and the average attenuation rate under various working conditions is about 34%and the human comfort requirement under pedestrian excitation is satisfied.
出处
《防灾减灾工程学报》
CSCD
2011年第1期75-79,共5页
Journal of Disaster Prevention and Mitigation Engineering
基金
国家"十一五"科技支撑项目(2006BAJ03A04)资助
