仓壁柱承钢筒仓结构行为的研究

仓筒壁直接支承于支柱是小型钢筒仓一种简单、经济的支承方式。采用数值分析方法,包括线性应力分析、线性特征值屈曲分析及几何非线性分析,对这类仓壁柱承钢筒仓的结构行为、特别对其稳定性能进行了系统研究。分析了仓筒径厚比、支柱伸入仓筒的高度、支柱宽度等几何参数对结构性能的影响。研究表明,支柱伸入高度是影响仓壁柱承筒仓屈曲强度的主要因素,屈曲模态也与之密切相关。为提高仓壁柱承筒仓的承载能力,支柱应尽可能地延伸至仓筒的顶部,这种支柱伸至仓顶檐梁的构造可用于大中型筒仓结构。

STRUCTURAL BEHAVIOR OF COLUMN-SUPPORTED STEEL SILOS WITH ENGAGED COLUMNS

Supporting silo walls directly on engaged columns provides a simple and cost-effective support arrangement for light steel silos.Numerical analyses including linear stress analyses,linear eigenvalue buckling analyses and geometrically nonlinear analyses are carried out to investigate the structural behavior(mainly stability behavior)of these column-supported steel silos with engaged columns.The effects of geometric parameters,including the radius-to-thickness ratio,the height of the engaged column and the width of the column,on the structural behavior are analyzed.It is found that the buckling strength of column-supported silos is mainly dependent on the height of the engaged column,which also affects the buckling deformation mode.In order to improve the load-carrying capacity of column-supported silos,the engaged columns should extend to the top of the silo wall.Such support arrangement that columns extend to the eave ring may be used in medium/heavy silos.