在合理内倾角度下，拱肋内倾可以有效地提高拱的横向稳定性。
With the reasonable included Angle, the inclination of ribs can improve the lateral stability of arch efficiently.
数目众多的纵、横向裂缝已大大削弱了混凝土顶拱的强度、刚度及稳定性，危及地下厂房的安全运行。
With the influence of so many cracks, the strength, stiffness and stability of the umbrella arch is decreased greatly, which endangers the operation of underground power house.
本文通过对承受竖向均布荷载的悬链线组拼无铰拱的分析，利用能量原理，建立了组拼拱的横向稳定屈曲临界荷载的计算公式。
Catenary assembled single rib arch that carries vertical loadings and was analyzed in this paper, calculation formula of critical loading of lateral stability flexuosity by the energy principle.
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