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(1 北京建工集團(tuán)有限責(zé)任公司, 北京 100055; 2 河北省土木工程災(zāi)變控制與災(zāi)害應(yīng)急重點(diǎn)實(shí)驗(yàn)室, 廊坊 065201; 3 華北科技學(xué)院建筑工程學(xué)院, 廊坊 065201)

摘要: 準(zhǔn)確把握建筑樓蓋結(jié)構(gòu)的動(dòng)力特性是結(jié)構(gòu)設(shè)計(jì)和健康監(jiān)測(cè)研究的重要工作. 在介紹基于運(yùn)行模態(tài)分析法的結(jié)構(gòu)模態(tài)參數(shù)識(shí)別方法的基礎(chǔ)上,以北京工人體育場(chǎng)項(xiàng)目為例,采用有節(jié)奏運(yùn)動(dòng)人群激勵(lì)對(duì)體育場(chǎng)直線 T 型板和弧線 T 型板進(jìn)行了振動(dòng)檢測(cè),采用脈動(dòng)法對(duì)體育場(chǎng)看臺(tái)混凝土結(jié)構(gòu)進(jìn)行了振動(dòng)檢測(cè),獲得了看臺(tái)板及看臺(tái)結(jié)構(gòu)的振動(dòng)加速度數(shù)據(jù),并利用頻域識(shí)別方法進(jìn)行了模態(tài)參數(shù)識(shí)別. 結(jié)果表明:體育場(chǎng)直線 T 型板、弧線 T 型板固有頻率分別分布在 5. 94、11. 88Hz 附近,分別屬于中、高頻板. 體育場(chǎng)看臺(tái)結(jié)構(gòu)懸挑端固有頻率主要分布在 4. 3 ~9. 38Hz 之間,看臺(tái)結(jié)構(gòu)設(shè)計(jì)滿足《建筑樓蓋結(jié)構(gòu)振動(dòng)舒適度技術(shù)標(biāo)準(zhǔn)》 (JGJ/ T 441—2019)要求. 體育場(chǎng)高區(qū)南北向棧橋區(qū)域看臺(tái)懸挑端固有頻率較低,建議現(xiàn)場(chǎng)應(yīng)避免長期使用頻率為 4. 3、2. 15Hz 附近的音樂.

關(guān)鍵詞: 北京工人體育場(chǎng); 看臺(tái)混凝土結(jié)構(gòu); 動(dòng)力特性; 動(dòng)力響應(yīng); 固有頻率

中圖分類號(hào):TU375, X839 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):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,學(xué)士,高級(jí)工程師,主要從事大型體育場(chǎng)館施工技術(shù)研究,Email:13693637969@ 163. com.

[引用本文] 王猛,李欣,衛(wèi)趙斌,等. 北京工人體育場(chǎng)看臺(tái)混凝土結(jié)構(gòu)振動(dòng)特性現(xiàn)場(chǎng)試驗(yàn)研究[ J]. 建筑結(jié)構(gòu),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.