混凝土球壳非线性稳定影响因素的有限元分析  

FEM analysis of stability of RC spherical shell considering non-linear factors

作　　者：刘家宝[1] 宋涛[1] 

机构地区：[1]中国建筑科学研究院,北京100013

出　　处：《建筑科学》2017年第3期1-6,共6页Building Science

摘　　要：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。The factors that influence the stability of reinforced concrete spherical shells consist of geometry nonlinearity,material non-linearity,initial imperfection,creep of concrete,reinforcement ratio et al. The influence of the factors is analyzed based on a typical RC spherical shell. The empirical formula provided in Chinese code and the methods of IASS recommendation are introduced to estimate the ultimate load-bearing capacity of the shell. The FEM analysis is carried out considering geometry non-linearity,material non-linearity,initial imperfection and reinforcement ratio. The result of the FEM is compared with the empirical methods to derive some conclusions. It should provide reference for the actual shell applications.

关 键 词：混凝土薄壳 球壳 稳定性 初始缺陷 

分 类 号：TU334[建筑科学—结构工程]