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Axial Compressive Buckling of a Double-Limb Column in a Precipitator Casing
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Axial Compressive Buckling of a Double-Limb Column in a Precipitator Casing
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Journal Article
Axial Compressive Buckling of a Double-Limb Column in a Precipitator Casing
2022
Overview
In the side supporting structure of a precipitator casing, the skeleton column is sometimes designed as a composite section composed of double H-shaped steel limbs and connecting wallboard. Column buckling is characterized by its special section and the stressed skin effect from wallboard. The influence of initial imperfections and structural parameters on column stability was investigated using the nonlinear finite element method. The residual stress has a slight adverse effect on column stability. The buckling modes can be categorized into two types: 1) buckling of connecting wallboard; 2) simultaneous buckling of connecting wallboard and flexural-torsional buckling of H-shaped limbs in top segment. Column stability significantly increases with increasing connecting wallboard thickness, decreasing connecting wallboard width, and decreasing distance between the connecting wallboard and the rear flange of H-shaped limbs. The structural parameters of the wallboard, angle steel stiffeners, and transverse brace interval have no noticeable effect. Column stability slightly increases with a decrease in the width-to-thickness ratio of flange, the height-to-thickness ratio of web, and torsional slenderness ratio. Based on the simulation results, a buckling capacity calculation recommendation was developed for an axial compressive double-limb column, which is important for the design of heavily stressed double-limb columns in box-type structures.
Publisher
Korean Society of Civil Engineers,Springer Nature B.V,대한토목학회
Subject
