轴压圆柱钢薄壳稳定设计综述

STABILITY DESIGN OF AXIALLY COMPRESSED THIN STEEL CYLINDRICAL SHELLS

轴压圆柱薄壳广泛应用于土木工程中的各类钢壳结构,包括筒仓、塔桅、烟囱及容器等。轴压圆柱壳的屈曲问题一直是壳体稳定研究中最为活跃的课题之一。本文全面总结轴压圆柱壳稳定设计方面的研究成果及设计准则。首先简要回顾轴压圆柱壳的弹性经典解及初始缺陷敏感性的经典研究,接着对实际结构中的初始缺陷与制作过程的关系以及焊接残余应力对屈曲强度影响的近期研究进展进行了总结。然后,在简单介绍欧洲钢结构协会规程对轴压圆柱壳稳定设计有关规定的基础上,详细说明了新的欧洲钢壳设计规范所给出的设计准则及相应的研究背景。

Thin cylindrical shells under axial compression are commonly found in a wide range of civil engineering steel shell structures, including silos, towers, chimneys and tanks. Buckling of axially compressed cylindrical shells has been one of the most active areas of shell buckling research. This paper provides a review of advances in stability research on axially compressed cylinders and in the development of design rules. Classical studies on the buckling of axially compressed cylindrical shells and the imperfection sensitivity of these shells are first introduced, followed by a summary of existing work on the relationship between the manufacturing process and the induced imperfection in a real shell, as well as the effect of residual stresses. The main focus of the paper is however to introduce the design rules for axially compressed cylinders in the new European code for steel shell structures, and to present the background information on which these rules were based.