上反柱帽預應力無梁樓蓋分析
栗增欣，曲京輝
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（中國建筑科學研究院，北京 100013）[摘要] 預應力無梁樓蓋廣泛應用于地下車庫，當其上覆土較厚時，采用上反柱帽可達到增大室內空間和簡潔美觀的目的。而上反柱帽預應力無梁樓蓋如何設計計算，卻未有相關報道。本文利用SAP2000對上反柱帽和傳統(tǒng)柱帽的預應力無梁樓蓋分別進行了分析對比，結果表明：在均布荷載作用下，兩種柱帽的彎矩和撓度基本相同；采用上反柱帽后預應力筋的矢高有較大提高，但其預應力效應的變化并不顯著。[關鍵詞] 無梁樓蓋; 上反柱帽; 預應力筋效應; 地下車庫中圖分類號：TU398+.1 文獻標識碼：A 文章編號：1002-848X(2013)S2-0539-03作者簡介：栗增欣，碩士，工程師，Email：Lee_CABR@163.com。Analysis on prestressed flat slab with reverse column-capLi Zengxin, Qu Jinghui(China Academy of Building, Beijing 100013, China)Abstract: Prestressed flat slab is used largely in underground garage. In some circumstances, the reverse column-cap can be used in the roof of the garage. Therefore the indoor space can be increased and the interior looks aesthetically and concise. However, there are no any reports on the calculation and design of prestressed flat slab with reverse column-cap. In this paper, prestressed flat slab with reverse column-cap and with traditional column-cap were analyzed and compared, using the software SAP2000. Analytic results indicated that the bending moment and deflection of different column-cap models, under distributed load, are basically identical. Moreover, the prestressed effect of reverse column-cap is limited, even if the rise of prestressed reinforcement increases.Keywords: flat slab; reverse column-cap; prestressed effect; underground garage
