- 摘 要
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（1 天津大學(xué)建筑工程學(xué)院， 天津 300072； 2 東南大學(xué)土木工程學(xué)院， 南京 210096）
［摘要］鋼筋混凝土空腹網(wǎng)架樓蓋和空腹夾層板樓蓋是基于大跨度樓蓋需要產(chǎn)生的新型樓蓋形式。詳細介紹了幾種大跨度鋼筋混凝土樓蓋的構(gòu)造特點，推導(dǎo)了考慮剪切變形的鋼筋混凝土空腹網(wǎng)架樓蓋和空腹夾層板樓蓋的等效剪切剛度。以25m×25m大跨度樓蓋工程為例，利用ANSYS和PKPM軟件對鋼筋混凝土密肋井字梁樓蓋、空腹網(wǎng)架樓蓋和空腹夾層板樓蓋的力學(xué)性能和經(jīng)濟指標進行了對比分析。結(jié)果表明：三種形式的樓蓋在均布荷載10kN/m2作用下的撓度均能滿足《混凝土結(jié)構(gòu)設(shè)計規(guī)范》（GB 50010—2010）要求，其中鋼筋混凝土空腹網(wǎng)架樓蓋和空腹夾層板樓蓋經(jīng)濟性能更好，具有明顯的優(yōu)勢。
［關(guān)鍵詞］密肋井字梁樓蓋; 空腹網(wǎng)架樓蓋; 空腹夾層板樓蓋; 力學(xué)性能; 經(jīng)濟性
中圖分類號：TU375 文獻標識碼：A 文章編號：1002-848X(2014)17-0040-06
Mechanical properties and economy analysis of large-span reinforced concrete floors
Luan Huanqiang1, Chen Zhipeng2, Chen Zhihua1
(1 School of Civil Engineering, Tianjin University, Tianjin 300072, China; 2 School of Civil Engineering, Southeast University, Nanjing 210096, China)
Abstract: Based on the need of large-span reinforced concrete floors, the reinforced concrete open-web grid floor and open-web sandwich plate floor were produced.Construction characteristics about several large-span reinforced concrete floors were introduced，and the equivalent shear stiffness formulas considering shear deformation of the open-web grid floor and the open-web sandwich plate floor were derived. Take the large-span floor (25m×25m) for example, the mechanical properties and economic indexes of the reinforced concrete density rib well-character floor, open-web grid floor and open-web sandwich plate floor were compared and analyzed by the software ANSYS and PKPM. The results show that the deflection of the three floors can well meet the requirements of Code for design of concrete structures (GB 50010—2010) under uniform load of 10kN/m2, the reinforced concrete open-web grid floor and open-web sandwich plate floor are more economic and have obvious advantages.
Keywords: density rib well-character floor; open-web grid floor; open-web sandwich plate floor; mechanical properties; economy
通訊作者：陳志華，博士，教授，Email：zhchen@tju.edu.cn。
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