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王佳煒，  黃  勇，  段  莉，  謝  欽

（貴州大學(xué)土木建筑工程學(xué)院，貴陽550003）

 

[摘要] 針對(duì)地下停車場(chǎng)樓面荷載和地下人防層樓面荷載2種荷載條件，分別對(duì)帶有重型柱帽和輕型柱帽的空腔模無梁樓蓋中進(jìn)行均布加載。通過合理的模型簡(jiǎn)化，運(yùn)用ANSYS有限元軟件進(jìn)行力學(xué)分析，并對(duì)計(jì)算結(jié)果進(jìn)行比較。結(jié)構(gòu)表明：采用重型柱帽的樓板板頂最大拉應(yīng)力，為采用輕型柱帽的68%；采用重型柱帽的樓板跨中最大壓應(yīng)力，為采用輕型柱帽的90%。由此證明：重型柱帽能夠有效地增加板與柱的連接面積，減小區(qū)格板帶的寬度，從而使支座能承受較大的剪力，提高頂板抗沖切能力。特別是在地下人防結(jié)構(gòu)層中采用空腔模無梁樓蓋時(shí)，選用重型柱帽能夠顯著地減弱板頂超載和柱距較大等不利因素的影響，使結(jié)構(gòu)受力更加合理。研究可為地下結(jié)構(gòu)中空腔模無梁樓蓋柱帽的設(shè)計(jì)提供理論依據(jù)。

[關(guān)鍵詞] 地下結(jié)構(gòu)；樓面荷載；空腔模無梁樓蓋；柱帽；ANSYS軟件；力學(xué)分析

中圖分類號(hào)：TUTU398 +.1, TU224    文獻(xiàn)標(biāo)識(shí)碼：A    文章編號(hào)：1002-848X(2012) S2-0388-04

 

Wang Jiawei, Huang Yong, Duan Li, Xie Qing

( School of Civil Engineering and Architecture, Guizhou University, Guiyang 550003, China)

 

Abstract: Under two kinds of floor load conditions of the underground parking and the underground civil air defense, uniform loading was applied on the empty cavity flat slab floor with heavy column cap or light column cap respectively. Through the reasonable model simplification, ANSYS finite element software was used to carry out mechanic analysis and the calculation results were compared. The result shows that maximum tensile stress at the plate top of the floor with the heavy column cap is 68% of the floor with the light column cap, maximum compressive stress at the midst of the plate floor

with the heavy column cap is 90% of the plate floor the light column cap. It proves that the heavy column cap can effectively increase the contact area of the slab and the column and can reduce the width of the grid plate, which can make the supporting seat sustain larger shear and enhance the roof's punching shear capacity. Especially when it is used in the underground civil air defense structure, the heavy column cap can effectively decrease the influence of adverse factors such as over loading and large intercolumniation and make the stress of the structure more reasonable. The study can provide

theoretical basis to the column cap design of empty cavity flat slab floor in the underground structure.

Keywords: underground structure, floor load; empty cavity flat slab floor, column cap; ANSYS software;

mechanic analysis