轴压和均匀内压下钢筒仓圆柱壳屈曲承载力研究  

Buckling Capacity Research of Silo's Cylindrical Shell under Axial Forces and Uniform Inner Pressure

作　　者：张翀[1] 舒赣平[2] 

机构地区：[1]东南大学建筑设计研究院有限公司,南京210096 [2]东南大学土木工程学院,南京210096

出　　处：《特种结构》2015年第4期1-7,共7页Special Structures

摘　　要：我国的《粮食钢板筒仓设计规范》对仓壁的稳定承载力计算方面的相关规定并不完善。本文以钢筒仓仓壁的圆柱壳体为研究对象,引入了四种常见的初始缺陷模式,对轴压和均匀内压下钢筒仓仓壁的弹性和弹塑性屈曲承载力进行了深入的参数化有限元分析,研究了各种缺陷模式对仓壁壳体屈曲承载力的影响,以及均匀内压对仓壁弹塑性屈曲承载力的提高程度。在有限元分析结果的基础上,结合中国规范的相关公式,拟合出轴压和均匀内压下钢筒仓仓壁的弹塑性屈曲承载力的计算公式。The Chinese Grain Steel Silo Design Code（GB50322-2001） does not include the elastic-plastic buckling capacity of silo wall under axial forces combined with uniform inner pressure.In this paper,by introducing four kinds of initial imperfections,the elastic and elastic-plastic buckling capacities of silo wall under axial forces combined with uniform inner pressure were researched by finite element method using parameter.The influence of different imperfection modes on buckling capacities and the inner pressure to enhance the elasto-plastic buckling capacities of silo wall were researched.Combined the finite element analysis results with relative formula in Chinese code,the formula of elasto-plastic buckling capacities of silo wall under axial forces combined with uniform inner pressure were fitted.

关 键 词：钢筒仓 圆柱壳 轴压 均匀内压 屈曲承载力 

分 类 号：TU391[建筑科学—结构工程]