（中国建筑西北设计研究院  西安 710003)
［提要］黄帝陵祭祀大殿屋盖为大跨度覆斗式屋盖，结构设计采用大跨度空间框架体系。分析计算表明，屋面梁板处于复杂的多维受力状态,圆柱承受较大水平推力，屋盖变形呈现出竖向下凹、水平外凸的特点，因此对屋面板及柱顶梁施加了预应力，有效地保证了开大洞覆斗式屋盖的刚度，减小了屋盖变形，降低了屋盖对框架柱的推力。提出了预应力在复杂钢筋混凝土空间框架体系中应有的放矢的设计理念。
［关键词］覆斗式屋盖；多维受力；预应力；空间框架；变形
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