Compressive stress and suction force are concurrence on the large arc roof by analysis.Compressive stress distributes on the start of arc, and suction force distributes on the overhang.

• 根据分析可知，大跨弧形屋面上同时存在压力和吸力，压力主要分布在屋面弧面起坡处，吸力主要分布在屋面挑篷部位；