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阐述了柱支预应力局部单双层浅网壳的构成原理 ,即柱支浅网壳施加适当预应力能减小结构位移、降低杆端弯矩和单元剪力 ,使网壳的内力分布更趋均匀 ,并降低柱顶水平推力和基础弯矩 ;因而可合理地将壳体中以薄膜力为主、且值很小的那部分区域改成单层。这样处理可降低造价 ,并具有较好的室内视觉效果。具体工程说明了这类结构的技术经济性 ,即施加适当预应力能提高整个结构的荷载 -重量比、与对应的柱支预应力双层浅网壳相比刚度虽然有所下降 ,但小于耗钢量降低率。
The principle of the local shallow double-layer shallow reticulated shell with prestressed columns is described, that is, the prestressing of the shallow reticulated shell can reduce the structural displacement, reduce the bending moment and the unit shear force, Uniform, and reduce the column top level of thrust and the basic bending moment; and therefore can reasonably shell to the film force-based, and the value of that part of the area into a single layer. This treatment can reduce costs and have better indoor visual effects. Specific engineering shows that the technical economy of this kind of structure, that is, the application of appropriate prestress can increase the load-weight ratio of the whole structure, compared with the corresponding column prestressed double-layer shallow reticulated shell stiffness decreased, but less than consumption Reduced rate of steel.