摘要
人致激励下,复杂轻柔的螺旋楼梯结构可能产生较大的振动响应,这不但会造成行人的舒适度问题,过大的振动还可能造成楼梯结构的安全问题。TMD常被应用于人行桥、大跨楼板等的舒适度控制上,但在楼梯结构减振中的应用还较为少见。以一实际工程中的复杂轻柔楼梯结构为背景,分析了其自振特性和在人致激励下的加速度响应。由于分析结果不满足规范要求的加速度响应限值,故为其设计了TMD减振系统。在相同的人致激励作用下,楼梯结构的响应有较大的减小,满足规范规定的舒适度限值要求。该螺旋楼梯结构TMD减振系统的分析和设计可为类似工程的减振设计提供参考。
The complex and gentle spiral stair structure may produce a large vibration response under human excitation.It not only causes the comfort problem of the pedestrian,but the excessive vibration can also cause the safety problem of the staircase structure.TMD is often applied to the comfort control of footbridges and large cross-floor boards,but the application of stair structure vibration reduction is relatively rare.In this paper,the vibration characteristics and acceleration responses under human excitations are analyzed based on the complex soft staircase structure in practical engineering.Because the analysis result does not meet the acceleration response limit of the specification,the TMD vibration reduction system is designed.Under the same human excitations,the response of the staircase structure is greatly reduced,which meets the requirement of the comfort limit.The analysis and design of the structure TMD vibration reduction system can provide reference for the design of vibration reduction for similar projects.
作者
张全伍
王梁坤
施卫星
ZHANG Quanwu;WANG Liangkun;SHI Weixing(Shanghai Zhili Vibration Technology Co.,Ltd.,Shanghai 200092,China;Research Institute of Structural Engineering and Disaster Reduction,Tongji University,Shanghai 200092,China)
出处
《结构工程师》
北大核心
2019年第3期30-35,共6页
Structural Engineers
关键词
楼梯结构
调谐质量阻尼器
人行激励
动力分析
加速度响应
stair structure
tuned mass damper
human excitation
dynamic behavior
acceleration responses
