- 摘 要
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(1 貴州省交通規(guī)劃勘察設(shè)計研究院股份有限公司， 貴陽 550081； 2 貴州大學空間結(jié)構(gòu)研究中心， 貴陽 550003)
［摘要］鋼-混凝土組合空腹夾層樓蓋是一種典型的三維受力結(jié)構(gòu)構(gòu)件。通過貴州省博物館新館5D影廳樓蓋進行現(xiàn)場模態(tài)實測及有限元計算的方法研究了此種樓蓋的自振特性，并在此基礎(chǔ)上對其跨高比及空腹率兩個影響樓蓋基頻的主要參數(shù)進行回歸分析，以尋求此類樓蓋自振頻率的簡化計算方法。研究表明，鋼-混凝土組合空腹夾層樓蓋自振特性與實心平板樓蓋類似，基頻較低，自振頻率比較密集，屬于模態(tài)密集型結(jié)構(gòu)。通過回歸分析推導出樓蓋基頻與跨高比和空腹率的關(guān)系式。
［關(guān)鍵詞］空腹夾層樓蓋； 大跨結(jié)構(gòu)； 貴州省博物館； 自振特性； 跨高比
中圖分類號：TU393-3文獻標識碼：A文章編號：1002-848X(2020)05-0104-05
Self-vibration characteristics analysis and research of steel-concrete composite open-web sandwich plates
Xu Xiangdong1, Ma Kejian2, Du Bin1, Tang Zhi1
(1 Guizhou Transportation Planning Survey and Design Academe Co., Ltd., Guiyang 550081, China; 2 Space Structure Research Center, Guizhou University, Guiyang 550003, China)
Abstract:Steel-concrete composite open-web sandwich plates are a typical three-dimensional force structures. The self-vibration characteristics of the plates which were applied to the 5D studio in Guizhou Museum were studied by the field mode test and the finite element method. Based on the self-vibration characteristics analysis, the regression analysis of the span-depth ratio and the fasting rate was carried out in order to find the simplified calculation method for the frequency of such plates. The research shows that the self-vibration characteristics of steel-concrete composite open-web sandwich plates are similar to solid plates. The fundamental frequency of steel-concrete composite open-web sandwich plates is lower, and its frequencies are quite dense. Therefore, it belongs to the mode-intensive structure. The relationship between the fundamental frequency, the span-depth ratio and the fasting ratio was derived through regression analysis.
Keywords:open-web sandwich plates; long-span structure; Guizhou Museum; self-vibration characteristics; span-depth ratio
*“十二五”國家科技支撐計劃 (2011BAJ09B01)。
作者簡介：徐向東，博士，工程師，Email: dallenxu@163.com。
