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(1 沈陽(yáng)建筑大學(xué)土木工程學(xué)院，沈陽(yáng) 110168；2 內(nèi)蒙古碧城房地產(chǎn)開發(fā)有限公司，呼和浩特 010010)

［摘要］以遼寧省某改擴(kuò)建高中食堂三層框架結(jié)構(gòu)為研究對(duì)象。首先，對(duì)二層樓蓋進(jìn)行了結(jié)構(gòu)動(dòng)力特性檢測(cè)，并依據(jù)《建筑工程容許振動(dòng)標(biāo)準(zhǔn)》（GB 50868—2013）的豎向振動(dòng)計(jì)權(quán)加速度級(jí)限值要求，對(duì)該層樓蓋的振動(dòng)舒適度進(jìn)行了評(píng)估；然后，以樓蓋結(jié)構(gòu)動(dòng)力特性的現(xiàn)場(chǎng)實(shí)測(cè)數(shù)據(jù)為基礎(chǔ)，在MIDAS/Gen上建立了反映結(jié)構(gòu)實(shí)際動(dòng)力特性的有限元模型；最后，依據(jù)二層樓蓋人群荷載流動(dòng)情況，設(shè)置了考慮荷載模型、步頻、人群數(shù)、行走路徑等因素的21種荷載工況，以樓蓋豎向峰值加速度和均方根加速度為評(píng)價(jià)指標(biāo)，并根據(jù)ISO2631-2(1989)及《高層建筑混凝土結(jié)構(gòu)技術(shù)規(guī)程》(JGJ 3—2010)等相關(guān)規(guī)定，詳細(xì)分析了各工況下樓蓋振動(dòng)干擾程度和影響范圍。分析結(jié)果表明，與沿樓蓋短軸方向相比，沿長(zhǎng)軸方向行走引起的振動(dòng)峰值加速度和均方根加速度更大，而人員跑動(dòng)激勵(lì)比行走激勵(lì)更容易引發(fā)樓蓋振動(dòng)舒適度問題。 

［關(guān)鍵詞］大跨度樓蓋； 改擴(kuò)建結(jié)構(gòu)； 舒適度分析； 人行荷載； 振動(dòng)； 檢測(cè) 

中圖分類號(hào)： TU375-4 文獻(xiàn)標(biāo)識(shí)碼： A文章編號(hào)：1002-848X(2021)16-0102-08

Analysis on floor vibration comfort of a reconstructed and expanded high school dining hall 

JIN  Qiao1,  WU  Xiangyu1,  WANG  Chuanke2,  HU  Jiafei1,  DAI  Yuxuan1 

(1 School of Civil Engineering , Shenyang University of Architecture，Shenyang 110168， China；2 Inner Mongolia Bicheng Real Estate Development Co., Ltd.，Hohhot 010010， China) 

Abstract: The three-story frame structure of a high school dining hall in Liaoning Province was taken as the research object. Firstly, the structural dynamic characteristics of the second floor were tested, and the vibration comfort of the floor was evaluated according to the limit value of the weighted acceleration level of the vertical vibrometer in the Standard for allowable vibration of building engineering (GB 50868—2013). Then, based on the field measured data of dynamic characteristics of floor structures, a finite element model reflecting the actual dynamic characteristics of the structure was established by MIDAS/Gen software. Finally, according to the load flow of people on the second floor,21 load conditions were set up by changing the load model, step frequency, crowd number and walking path. Taking the vertical peak acceleration and root mean square acceleration of the floor as the evaluation indicators, and according to ISO2631-2 (1989)  and Technical regulations for concrete structures of high-rise buildings (JGJ 3—2010) and other relevant provisions, the vibration interference degree and influence range of floor under various working conditions were analyzed in detail. The analysis results show that the peak acceleration and root mean square acceleration of vibration caused by walking along the long axis are greater than those along the short axis of the floor, and the running excitation of people is more likely to cause the problem of floor vibration comfort than the walking excitation. 

Keywords:large-span floor； reconstruction and extension structure； comfort analysis； pedestrian load； vibration； inspection

*國(guó)家重點(diǎn)研發(fā)計(jì)劃（2018YFC1504303）。

 作者簡(jiǎn)介：金嶠，博士，副教授，碩士生導(dǎo)師，Email：goldenfss@163.com。