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最近几年,苏联推广应用了3×12、3×18和3×24米的КЖС型壳板。КЖС型壳板,是装配式的大型预应力钢筋混凝土结构,可在跨度为12、18和24米的生产厂房屋盖中应用。同传统的平面屋盖结构——拱形屋架和平板相比较,它的优越性在于壳板的空间作用,能简化房屋的构造型式,保证材料用量最小,而且制造和安装简单。预应力钢筋布置在侧肋-隔板中,它由单根普通钢筋或钢绞线构成。非预应力钢筋网敷设在壳面内,独立骨架则在肋部。同传统的平面结构相比,КЖС型壳板内配筋总数最少。为了综合建成有保温层和屋面的大型构件所组成的大型厂房的屋盖结构,大
In recent years, the Soviet Union has promoted the use of 3×12, 3×18 and 3×24 meters КЖС shell plates. The КЖС shell plates are prefabricated large-scale prestressed reinforced concrete structures that can be used in the lids of production houses with spans of 12, 18 and 24 meters. Compared with the traditional flat roof structure, arched roof trusses and flat panels, its superiority lies in the space effect of the shells, which can simplify the construction of the house, ensure the minimum amount of materials, and make the manufacture and installation simple. The pre-stressed steel bars are arranged in the side rib-separator and consist of a single ordinary steel bar or steel strand. The non-prestressed steel mesh is laid inside the shell and the independent skeleton is on the ribs. Compared with the traditional planar structure, the total number of reinforcing bars in the КЖС shell is the smallest. In order to integrate the roof structure of a large-scale factory building composed of large-scale components with insulation layers and roofs,