某工程连廊及不规则悬挑结构振动舒适度分析与控制
Vibration comfort analysis and control of corridors and irregular cantilevered structure in a project
丁海峰 1张金明 2蔡建国 3李仲毅 2叶霄鹏 2王洋2
作者信息
- 1. 中国铁建投资集团有限公司,珠海 519030
- 2. 珠海铁建大厦置业有限公司,珠海 519030
- 3. 东南大学国家预应力工程技术研究中心,南京 211189
- 折叠
摘要
针对某工程连廊及不规则悬挑结构,基于MIDAS/Gen软件建立有限元仿真分析模型,按照国内外相关规范,验算结构正常使用时各人行荷载工况下的舒适度.针对不满足要求的结构,开展基于调谐质量阻尼器(TMD)的振动控制分析,并对无控制状态及振动控制后的计算结果进行对比.结果表明:连廊及悬挑结构在人行荷载激励下部分工况下竖向加速度响应超过规范限值,最大可达 0·983 9m/s2,采用TMD系统进行减振控制后,结构加速度响应得到有效降低;对于超限工况,TMD有效减振率在 69%以上,最高减振率达 90·82%,平均减率为 85·59%.
Abstract
Aiming at the corridors and irregular cantilevered structures in a project,the finite element model was established by MIDAS/Gen software,based on the specifications at home and abroad,the comfort in various working conditions that may occur in normal use was analyzed.For structures that do not meet the requirements,the vibration control analysis based on a tuned mass damper(TMD)was carried out,and the calculation results without vibration control and under vibration control were compared.The results show that the vertical acceleration response of corridors and irregular cantilevered structures under pedestrian load exceeds the specification limit,up to 0.983 9m/s2.After the introduction of the TMD for vibration control,the acceleration responses of the structure was significantly reduced.For the over-limit condition,the vibration mitigation rate of TMD is above 69%,the maximum vibration mitigation rate reaches 90.82%,and the average vibration mitigation rate is 85.59%.
关键词
大跨结构/不规则悬挑结构/人行荷载/舒适度/调谐质量阻尼器/减振率Key words
large-span structure/irregular cantilevered structure/pedestrian load/comfort/tuned mass damper/damping ratio引用本文复制引用
基金项目
中国铁建投资集团有限公司2020年度科技研发计划课题(2020-A02)
出版年
2024
NETL
NSTL
万方数据