摘要
空中连廊结构因其跨度较大、强度较柔、频率较低等特性,一直是振动控制设计中的难点。本文运用SAP 2000软件,结合某空中连廊结构模型进行减振分析。无控结果分析表明:连廊结构跨中区域在第二阶有非常明显的竖向振动,因此在该区域极易产生共振现象,进而导致行人行走不便。鉴于此,本文采用MTMD减振控制技术沿连廊结构在合适位置对称布置多个TMD。有控结果显示:工况3即共振荷载模式下减振效果达50%,可大大降低行人行走恐慌感。本文研究成果可为人行荷载作用下柔性结构振动控制提供一定的借鉴与参考。
The space corridor structure has been a difficulty in vibration control design because of its large span,soft strength,low frequency and other characteristics.In ths paper,SAP 2000 software is used to deal with vibration reduction analysis based on a structural model of space corridor.The analysis of the uncontrolled results shows that the vertical vibration in the middle area of the corridor structure has a very obvious vertical vibration in the second order,so it is very easy to produce resonance in this area,which leads to pedestrians,walking inconvenience.In view of this,MTMD vibration reduction control technology is adopted to arrange multiple TMDs symmetrically at suitable locations along the corridor structure.The controlled results show that the vibration reduction effect reaches 50%in working condition 3,i.e.,resonant load mode,which greatly reduces the sense of panic when pedestrians walk.The results can provide a certain reference for the vibration control of flexible structures under the action of pedestrian load.
作者
杨也
汪大洋
YANG Ye;WANG Dayang(School of Civil Engineering,Guangzhou University,Guangzhou 510006,Guangdong,China)
出处
《工程建设》
2022年第3期31-36,共6页
Engineering Construction
关键词
空中连廊
低频率
共振
减振分析
MTMD
space corridor
low frequency
resonance
vibration reduction analysis
MTMD
