钢筋混凝土V形拱板是一个空间体系的屋面结构,在以恒载为主的屋面荷载下,弯矩很小,可以应用于较大跨度的建筑物的屋盖。我们已在跨度为25米的某工程中应用(图1)。 该屋面主要由预制V形拱板、拉杆和拱脚圈梁三部分组成(见图2)。拱轴线采用二次抛物线形,以最大限度减小拱板中的弯矩。拱板屋面矢高采用(1/7)*ι。V形拱板的横截面考虑到利用土胎模重迭生产,在纵向和横向均取同一厚度5厘米。横截面与水平面的夹角取25°～30°,过大会使制作时混凝土流淌且不 Reinforced concrete V-shaped arch is a roof structure of a space system. Under the roof load with a constant load, the bending moment is very small and can be applied to the roof of a large-span building. We have applied it in a project with a span of 25 meters (Figure 1). The roof is mainly composed of three parts of prefabricated V-shaped arches, tie rods, and arched ring beams (see Figure 2). The arch axis is quadratic parabolic in order to minimize the bending moment in the arch. The roof height of the arch plate is (1/7)*ι. The cross-section of the V-shaped arch is taken into account in the overlap production with the use of the soil molds, and the same thickness is taken in the longitudinal and transverse directions by 5 cm. The angle between the cross section and the horizontal plane is 25° to 30°, so that the concrete does not flow during production and does not