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單、雙向鋼-混凝土組合樓蓋對比分析及設(shè)計建議

聶建國，卜凡民(清華大學(xué)土木工程系，結(jié)構(gòu)工程與振動教育部重點實驗室，北京 100084)

［摘要］近年來雙向鋼-混凝土組合樓蓋的應(yīng)用日益廣泛，但對其試驗研究和理論分析較少，工程應(yīng)用中對單、雙向鋼-混凝土組合樓蓋力學(xué)特性的差異研究不多，對兩種樓蓋形式的經(jīng)濟性和適用范圍比較模糊。采用非線性有限單元法計算分析了單、雙向鋼-混凝土組合樓蓋靜、動力特性，分析結(jié)果表明：雙向組合樓蓋通常具有更高的剛度和承載力，但隨著長寬比增大，空間作用降低，單位面積用鋼量增加；綜合考慮組合樓蓋力學(xué)特性、經(jīng)濟性以及施工等因素，建議長寬比小于1.3時采用雙向布置。

［關(guān)鍵詞］鋼-混凝土組合樓蓋；非線性有限單元法；力學(xué)特性；經(jīng)濟性

中圖分類號：TU398.7文獻標(biāo)識碼：A文章編號：1002-848X(2011)01-0001-05

Comparative analysis and design suggestion of one-way and two-way steel-concrete composite floor

Nie Jianguo, Bu Fanmin

(Key Laboratory of Structural Engineering and Vibration of China Education Ministry, Department of Civil Engineering,

Tsinghua University, Beijing 100084, China)

Abstract:Two-way steel-concrete composite floors are widely used in recent years, but experimental study and theoretical analysis are inadequate. The differences between one-way and two-way steel-concrete composite floors are rarely studied in engineering designs, the economical efficiency and scope of application are unclear. A nonlinear finite element analysis method was employed to give comparisons with static and dynamic characteristics between one-way and two-way steel-concrete composite floor. The results show that two-way steel-concrete composite floor has higher stiffness and bearing capacity than one-way steel-concrete composite floor, but the advantages decrease with aspect ratio increasing. On the basis of comprehensive consideration of mechanical characteristics, economical efficiency and construction factors, it is recommended to use two-way steel-concrete composite floor when aspect ratio is less than 1.3.

Keywords:steel-concrete composite floor; nonlinear finite element analysis method; mechanical characteristics; economical efficiency

*國家自然科學(xué)基金重點資助項目(50438020)。

作者簡介：聶建國，博士，教授，博士生導(dǎo)師，長江學(xué)者特聘教授，Email：niejg@mail.tsinghua.edu.cn

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