- 摘 要
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（1 西安建筑科技大學(xué)建筑設(shè)計研究院， 西安 710055； 2 西安建筑科技大學(xué)土木工程學(xué)院，西安 710055； 3 北京邁達斯技術(shù)有限公司西安分公司， 西安 710000）
［摘要］中庭環(huán)廊作為商場內(nèi)的重要交通樞紐，在結(jié)構(gòu)設(shè)計時其安全性應(yīng)得到重視。但由于空間及功能要求，豎向構(gòu)件布置受限，樓蓋常采用懸挑及大跨度梁的布置形式，造成樓蓋結(jié)構(gòu)豎向剛度較弱，人群荷載作用下易產(chǎn)生振動，在實際設(shè)計中常忽視對其舒適度的考察。采用MIDAS/Gen軟件對3個商場中庭環(huán)廊模型進行了變形、特征值及時程分析等計算，提取了撓度、自振頻率及峰值加速度等分析數(shù)據(jù)進行討論。結(jié)論表明，商場中庭懸挑環(huán)廊自振頻率低，采用撓度控制不能保證其舒適度，應(yīng)對其進行時程加速度驗算，并應(yīng)結(jié)合人對加速度的敏感程度對結(jié)構(gòu)設(shè)計進行評估。
［關(guān)鍵詞］商業(yè)中庭； 懸挑環(huán)廊； 舒適度； 人行荷載； 時程分析
中圖分類號：TU202文獻標識碼：A文章編號：1002-848X(2017)06-0044-06
Serviceability analysis and evaluation on cantilever ring corridors of commercial atriums
Zheng Yue1, Luo Zheng1, Zhao Xuan2, Lu Peng2, Zheng Weiwei3
(1 Architecture Design and Research Institute, Xi′an University of Architecture and Technology, Xi′an 710055, China;
2 College of Civil Engineering, Xi′an University of Architecture and Technology, Xi′an 710055, China;
3 Xi′an Branch of Beijing MIDAS Information Technology Co., Ltd., Xi′an 710000, China）
Abstract:The atrium ring corridor is an important transportation hub of the mall, so its security should be paid more attention to in structural design. However, because of the space and function requirements, the arrangement of vertical components limits floor design, so this kind of floor often adopts arrangement forms of cantilever and large-span beam. It weakens vertical stiffness of the floor, which is easy to cause floor vibration under walking load. But investigation on the serviceability is often ignored in the design all the time. MIDAS/Gen software was used to calculated deformation, frequency and time-history analysis on three atrium ring corridor models in malls. Analysis data were selected and discussed including deflection, natural frequency and peak acceleration. Results indicate that atrium cantilever ring corridors in malls have low vibration frequencies. Deflection control cannot guarantee its serviceability, so the acceleration time-history analysis should be conducted, and the human sensitive degree also should be combined in evaluating structural design.
Keywords:commercial atrium; cantilever ring corridor; serviceability; walking load; time\|history analysis
作者簡介：鄭粵，工程師，Email：327397517@qq.com。
