(1 北京建工集团有限责任公司, 北京 100055; 2 河北省土木工程灾变控制与灾害应急重点实验室, 廊坊 065201; 3 华北科技学院建筑工程学院, 廊坊 065201)

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.

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

中图分类号:TU375, X839 文献标志码:A 文章编号:1002-848X(2023)06-0040-07

DOI:10. 19701 / j. jzjg. ZJ220105

Field experiment study of vibration characteristics of Beijing Workers Stadium stand concrete structure

WANG Meng1, LI Xin1, WEI Zhaobin2,3, GUO Yaxing1

(1 Beijing Construction Engineering Group Co. , Ltd. , Beijing 100055, China; 2 Hebei Key Laboratory of CivilEngineering Catastrophe Control and Disaster Emergency Response, Langfang 065201, China; 3 Architectural EngineeringCollege, North China Institute of Science and Technology, Langfang 065201, China)

Abstract: It is important to accurately obtain the dynamic characteristics of building floor structure in structural design andhealth monitoring study. On the basis of introduction of structural modal parameter identification method based onoperational modal analysis, the Beijing Workers Stadium project was taken as an example, the rhythmic motion crowdexcitation was used for vibration test of the stadium linear T-slab and arc T-slab, and the pulsation method was used forvibration test of the concrete structure of the stadium stand, and the vibration acceleration data of the stand slab and thestand structure were obtained, and the modal parameters were identified by using the frequency domain identificationmethod. 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 ofthe stadium stand structure is mainly distributed between 4. 3 ~ 9. 38Hz, and the design of the stand structure meets therequirements of the Technical standard of vibration comfort of the floor structure ( JGJ/ T 441—2019). Stadium high areanorth-south trestle bridge area stand overhanging end natural frequency is low, it is recommended that the site should avoidthe long term use of music near the frequency of 4. 3 and 2. 15Hz.

Keywords: Beijing Workers Stadium; stand concrete structure; dynamic characteristics; dynamic response;natural frequency

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.

[引用本文] 王猛,李欣,卫赵斌,等. 北京工人体育场看台混凝土结构振动特性现场试验研究[ J]. 建筑结构,2023,53(6):40-46. WANG Meng,LI Xin,WEI Zhaobin, et al. Field experiment study of vibration characteristics ofBeijing Workers Stadium stand concrete structure[J]. Building Structure,2023,53(6):40-46.