摘要
准确把握建筑楼盖结构的动力特性是结构设计和健康监测研究的重要工作。在介绍基于运行模态分析法的结构模态参数识别方法的基础上,以北京工人体育场项目为例,采用有节奏运动人群激励对体育场直线T型板和弧线T型板进行了振动检测,采用脉动法对体育场看台混凝土结构进行了振动检测,获得了看台板及看台结构的振动加速度数据,并利用频域识别方法进行了模态参数识别。结果表明:体育场直线T型板、弧线T型板固有频率分别分布在5.94、11.88Hz附近,分别属于中、高频板。体育场看台结构悬挑端固有频率主要分布在4.3~9.38Hz之间,看台结构设计满足《建筑楼盖结构振动舒适度技术标准》(JGJ/T 441—2019)要求。体育场高区南北向栈桥区域看台悬挑端固有频率较低,建议现场应避免长期使用频率为4.3、2.15Hz附近的音乐。
It is important to accurately obtain the dynamic characteristics of building floor structure in structural design and health monitoring study.On the basis of introduction of structural modal parameter identification method based on operational modal analysis,the Beijing Workers Stadium project was taken as an example,the rhythmic motion crowd excitation was used for vibration test of the stadium linear T-slab and arc T-slab,and the pulsation method was used for vibration test of the concrete structure of the stadium stand,and the vibration acceleration data of the stand slab and the stand structure were obtained,and the modal parameters were identified by using the frequency domain identification method.The results show that the natural frequencies of the stadium linear T-slab and arc T-slab are distributed around 5.94 and 11.88Hz respectively,which are medium and high frequency slab.The natural frequency of the overhanging end of the stadium stand structure is mainly distributed between 4.3~9.38Hz,and the design of the stand structure meets the requirements of the Technical standard of vibration comfort of the floor structure(JGJ/T 441-2019).Stadium high area north-south trestle bridge area stand overhanging end natural frequency is low,it is recommended that the site should avoid the long term use of music near the frequency of 4.3 and 2.15Hz.
作者
王猛
李欣
卫赵斌
郭雅兴
WANG Meng;LI Xin;WEI Zhaobin;GUO Yaxing(Beijing Construction Engineering Group Co.,Ltd.,Beijing 100055,China;Hebei Key Laboratory of Civil Engineering Catastrophe Control and Disaster Emergency Response,Langfang 065201,China;Architectural Engineering College,North China Institute of Science and Technology,Langfang 065201,China)
出处
《建筑结构》
北大核心
2023年第6期40-46,共7页
Building Structure
关键词
北京工人体育场
看台混凝土结构
动力特性
动力响应
固有频率
Beijing Workers Stadium
stand concrete structure
dynamic characteristics
dynamic response
natural frequency
作者简介
第一作者:王猛,学士,高级工程师,主要从事大型体育场馆施工技术研究,Email:13693637969@163.com;通信作者:卫赵斌,硕士,讲师,主要从事工程结构振动特性研究,Email:davidwdb@ncist.edu.cn。
