120m直径无缝贮煤筒仓的非线性有限元分析

对120 m直径无缝钢筋混凝土圆形贮煤筒仓进行线性与非线性有限元对比分析。在有限元建模时,考虑了筒仓及地基基础的上下部协同作用。钢筋混凝土筒仓分别采用了线弹性模型和非线性弹塑性损伤模型。得出了环梁、仓壁、桩基础、承台、土体等部位的应力、位移结果。分析发现,线弹性模型各向应力峰值比弹塑性损伤模型大而变形则相反,弹塑性损伤模型更为合理,筒仓薄弱部位位于环梁与下部承台处。

Nonlinear Finite Element Analysis of 120 m Diameter Seamless Coal Silo

The structure behaviors of a 120 m diameter reinforced concrete circular coal silo were investigated by linear and nonlinear finite element method.In the analysis,the affections of the foundation and ground were considered.The linear model and elastoplastic damage model were used independently.The stresses and displacements of the key parts of the model were statistically obtained,including ring beam,silo wall,pile caps,pile foundation,and the reinforced soil as well.It is concluded that linear elastic model for anisotropic stress peak value is larger than the elastoplastic damage model,but the deformation is opposite,the elastoplastic damage model is more reasonable and conforms that the actual situation of the reinforced concrete silo weak regions are located in the ring beam and the lower bearing platform.