将刚性屋面板离散为等刚度壳单元,连接件离散成一组弹簧单元,基于非线性数值计算方法,建立了刚性屋面索穹顶结构的非线性数值计算模型,采用牛顿-拉普森法和弧长法相结合的方法跟踪荷载-位移求解全过程,进而分析刚性屋面的协同工作对索穹顶结构整体刚度和稳定承载力的影响。数值计算结果表明:该文建立的数值计算模型模拟刚性屋面索穹顶结构是合理有效的;刚性屋面的协同工作使得索穹顶结构对荷载的敏感性降低,提高了结构的整体刚度和稳定承载力。 Based on the nonlinear numerical calculation method, a nonlinear numerical model of rigid roof cable dome was established. The Newton-Laplace method and the arc length Method to track the whole process of load-displacement solution, and then analyze the impact of the rigid roof on the overall stiffness and stability of the cable dome structure. The numerical results show that the numerical simulation model established in this paper is reasonable and effective to simulate the rigid roof cable dome structure. The cooperative work of the rigid roof makes the cable dome structure less susceptible to the load and improves the overall stiffness and the stable bearing capacity of the structure.