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虽然盖格式索穹顶构造简单、施工方便,在国内外圆形平面场馆中均取得了成功的应用,但在椭圆形平面场馆中的应用较少。结合力密度法及整体可行预应力概念,以天津理工大学索穹顶前期设计为背景,探索了椭圆形盖格式索穹顶初始预应力的确定方法,通过对三种不同索杆布置形式的初始预应力值的对比,可知:边界不等高且环索随边界坡度变化的盖格式索穹顶通过采取合理的改进措施后,更能适用于椭圆形屋面。
Although the cap format cable dome is simple in construction and convenient in construction, it has been successfully applied in round flat venues both at home and abroad, but less used in elliptical flat venues. Combining force density method and the concept of feasible whole prestress, the method of determining the initial prestress of cable dome with elliptical cover is explored on the basis of the pre-dome design of cable dome of Tianjin University of Technology. Through the analysis of the initial prestressing force of three different cable rod arrangements, The results show that the lidded cable dome with different contour and varying slope along the boundary can be more suitable for oval roofing through reasonable improvement measures.