大跨度走廊在人行荷载下的MTMD减振分析

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英文篇名：Study on the vibration reduction of a long-span passageway using MTMD 中文刊名：建筑结构 英文刊名：Building Structure 作者：周国伟 ; 徐金军 ; 张志强 ; 李爱群 英文作者：Zhou Guowei1 ; 2 ; Xu Jinjun3 ; Zhang Zhiqiang1 ; 4 ; Li Aiqun4(1 School of Civil Engineering ; Southeast University ; NanJing 210096 ; China ; 2 Huasen Architectural & Engineering Designing Consultant Ltd. ; Nanjing 210096 ; China ; 3 Internal Trade Engineering Design and Research Institute ; Beijing 100001 ; China ; 4 Southeast University Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education ; Nanjing 210096 ; China) 中文关键词：调谐质量阻尼器 ; 人行荷载 ; 减振控制 英文关键词：tuned mass damper ; walking load ; vibration control 出版日期：2011-04-15 机构：东南大学土木工程学院;华森建筑与工程设计顾问有限公司南京分公司;国内贸易工程设计研究院;东南大学混凝土及预应力混凝土结构教育部重点实验室; 年：2011 期：S1 出版单位：建筑结构

摘要

在研究某体育场的动力特性的基础上,针对大跨度走廊在不同工况的人行荷载激励下的竖向振动,采用了在走廊上布置多组不同参数MTMD的减振方法,其中MTMD的频率需要根据结构的竖向自振频率和人行荷载的激励频率来确定。模态分析结果表明,该结构有明显的竖向振型,且该竖向振型的频率与人行荷载快走工况下的频率非常接近,走廊在该频率的荷载激励下产生共振。按本文方法在走廊的合适部位设置TMD后,共振激励下的加速度响应减小50%以上,满足人体舒适度要求,并且,其他频率荷载激励下的加速度响应也有一定程度的减小。工程中,采用TMD减振技术是一种经济、实用的方法,对结构起到了良好的控制作用。由于TMD对结构自身频率非常敏感,在实际应用前应对实际结构进行动力特性测试,以保证减振效果。
A stadium passageway using MTMD in vibration control was analyzed.The result shows that the stadium's vertical vibration mode is obvious,and the frequency of this mode is close to man's quick-walk frequency.The load in this frequency will cause resonance vibration in the passageway.When MTMD is set to certain place in the passageway,the acceleration response under resonance excitation reduces 50%,which reaches the target of human comfort.Even more,when loaded by other walking frequency,the passageway response with TMD is also reduced by certain degree.The technology of vibration reduction using TMD is an economic and effective method in this project.As TMD is sensitive to frequency,the dynamic characteristic-measurement is needed before actually used.

引文

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