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以某低矢跨比的单层柱面网壳分析与设计为例,分析该网壳在各种荷载作用下的受力特点;讨论网壳支承刚度对网壳的受力影响;介绍网壳的设计和节点构造方法;并着重研究网壳的整体稳定性。得出:低矢跨比单层柱面网壳的整体稳定对支承刚度和初始几何缺陷较敏感;考虑塑性影响后,低矢跨比柱面网壳的稳定承载力相对弹性稳定承载力有大幅度降低;不同的荷载作用下,支承刚度对网壳的受力影响不同。
Taking a low-rise-span ratio single-layer cylindrical reticulated shell analysis and design as an example, the force characteristics of the reticulated shell under various loads are analyzed. The influence of the support stiffness of the reticulated shell on the reticulated shell is discussed. Design and node construction methods; and focus on the overall stability of the reticulated shell. The results show that the low-sagittal span is more sensitive than the single-layer cylindrical reticulated shell to the bearing stiffness and the initial geometric imperfection. After considering the plastic effect, the low-sagittal span has larger relative elastic stability capacity than the cylindrical reticulated shell Amplitude decreases; under different loads, the bearing stiffness of the impact force of the reticulated shell different.