摘要
新型铁路站房楼盖具有跨度大、刚度小、阻尼比低的特点,使得大跨度楼盖结构在人群活动下容易产生较大的振动,从而引起候车旅客的不舒适。基于国内外相关的研究成果,构造人群荷载的力学模型。针对沈阳站房大跨楼盖工程,选取TMD装置对结构进行人群荷载作用下的振动控制与舒适度设计,分别对多种人群荷载工况下减振前后楼盖结构的动力响应进行全过程分析,并对楼面结构减振前后的峰值加速度指标进行对比分析。结果表明:大跨楼面结构采用的TMD减振方案可以满足人群荷载作用下的舒适度要求,减振效果良好。
New railway station building floor structure is characterized by large span, small stiffness and low damping, which may result in big vibration and discomfort on account of human activities. Based on relevant research results at home and abroad, the model of crowd-induced load is created. According to the engineering of large span floor structure of Shenyang railway station, TMD is selected and designed to control the floor vibration and comfort under the effect of crowd load. Time-history analysis is carried out under different working conditions of human activities to analyze the dynamic response and, compare and analyze the index of peak acceleration before and after TMD is installed. The results show that TMD vibration reduction scheme adopted in the large span floor structure can meet the requirement of comfort under crowd load and have a good anti-vibration effect.
出处
《铁道标准设计》
北大核心
2016年第4期99-103,共5页
Railway Standard Design
关键词
大跨度楼盖
TMD
振动控制
动力响应
加速度
铁路客站
Large span floor
TMD
Vibration control
Dynamic response
Acceleration
Railway passenger station
