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（中國(guó)建筑西北設(shè)計(jì)研究院  西安 710003)
［提要］黃帝陵祭祀大殿屋蓋為大跨度覆斗式屋蓋，結(jié)構(gòu)設(shè)計(jì)采用大跨度空間框架體系。分析計(jì)算表明，屋面梁板處于復(fù)雜的多維受力狀態(tài),圓柱承受較大水平推力，屋蓋變形呈現(xiàn)出豎向下凹、水平外凸的特點(diǎn)，因此對(duì)屋面板及柱頂梁施加了預(yù)應(yīng)力，有效地保證了開大洞覆斗式屋蓋的剛度，減小了屋蓋變形，降低了屋蓋對(duì)框架柱的推力。提出了預(yù)應(yīng)力在復(fù)雜鋼筋混凝土空間框架體系中應(yīng)有的放矢的設(shè)計(jì)理念。
［關(guān)鍵詞］覆斗式屋蓋；多維受力；預(yù)應(yīng)力；空間框架；變形
Structural Design for Big Span Prestressed Concrete Roof of Yellow Emperor Mausoleum Sacrifice Hall/Jia Junming, Wu Kun, Tao Ximing, Wei Sunyin(China Northwest Building Design Research Institute, Xi"an 710003, China)
Abstract:The sacrifice hall roof of the Yellow Employer Mausoleum is a big-span bucket typed roof structure and the big-span space frame system is adopted in design. The analysis and calculation indicate that the roof beam-and-slab is under the condition of being stressed with complicated multiple dimensions, the column bears larger horizontal trust and the roof deformation appears vertical downward concave and horizontal outward concave. Therefore, the roof beam-and-slab and column top beam are pre-stressed, which guarantees the rigid of big-opening bucket typed roof, reduces the roof deformation and lows the trust of roof acting on frame column. The design concept that the application of prestress in complicated reinforced concrete space frame system should have a definite object in view is put forward.
Keywords:bucket typed roof; pretressing; spatial frame; deformation