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影响钢筋混凝土球壳稳定性分析的因素包括几何非线性、材料非线性、初始缺陷、混凝土徐变、配筋分布及配筋率等。本文对这些因素的影响进行分析,以一个典型球壳模型为例,分别采用规范中经验公式方法和IASS推荐的半经验方法计算球壳极限承载力,并采用有限元方法进行考虑几何非线性、材料非线性、初始缺陷、配筋率等因素的极限承载力计算。将有限元计算结果与经验方法进行比较,分析各种因素的影响,对计算结果的判断提出建议,以期为实际工程应用提供参考。
Factors influencing the stability analysis of reinforced concrete spherical shell include geometric nonlinearity, material nonlinearity, initial defects, concrete creep, reinforcement distribution and reinforcement ratio. In this paper, the influence of these factors is analyzed. Taking a typical spherical shell model as an example, the ultimate bearing capacity of the spherical shell is calculated by the empirical empirical formula method and the semi-empirical method recommended by IASS respectively. The finite element method is used to consider the geometric nonlinearity, Material nonlinearity, initial defect, reinforcement ratio and other factors of ultimate bearing capacity calculation. The finite element calculation results are compared with the empirical methods to analyze the influence of various factors and to make some suggestions on the judgment of the calculation results so as to provide a reference for the practical engineering application.