Cone-cylinder intersections are used commonly in pressure vessels and piping, and internal pressurization is often an important loading condition. For the intersection of the large end of a cone and a cylinder, internal pressurization causes large circumferential compressive stresses in the intersection. These stresses can lead to failure of the intersection by either axisymmetric collapse or non-symmetric buckling. This paper first presents a brief summary of recent experiments on cone-cylinder intersections under internal pressure.Arational finite element model based on the experimental and the corresponding numerical results is next described. Finite element results from a major parametric study on the postbuckling behaviour and strength of cone-cylinder intersections employing this finite element model are then presented. Finally, a design proposal in the Eurocode format for internally pressurized cone-cylinder intersections is established for practical use.

Cold-formed lipped channel sections have been widely used in light gauge steel construction. Among the several possible buckling modes, the distortional buckling mode involving rotational deformation of the flange–lip combination about the flange–web junction is often the strength-governing mode. While many studies have been carried out on this buckling mode, the method of Lau and Hancock (J. Struct. Eng. ASCE 113 (1987) 1063), which models the phenomenon as the flexural–torsional buckling of the flange–lip combination with elastic restraints from the web appears to be the most effective in producing a relatively simple closedform solution for design use. This article extends the Lau and Hancock method, which was developed for axially loaded columns to beam-columns subjected to combined axial compression and biaxial bending. Particular attention is paid to the case of axial compression in combination with uniaxial bending in the plane of symmetry. Numerical results from the present closed-form solution are compared with those from the finite strip method, showing a close agreement between the two. The numerical results also lead to a number of useful observations on the distortional buckling behavior of these beam-columns, which should be useful in the future development of a simplified solution for direct design use.

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。

当前空间结构的发展方兴未艾、极具活力，新的空间结构形式不断涌现，传统的空间结构分类方法有时难以适应新的发展要求。本文提出一种以空间结构组成的基本单元进行分类的新的空间结构分类方法。组成空间结构的基本单元可归纳为板壳单元、梁单元、杆单元、索单元和膜单元等五种。根据国内外已建的空间结构工程，总结了33种具体的空间结构形式，它们均可由某一种单元或某两种、三种单元构成。文中还结合近年来空间结构发展中出现的一些新结构，对新的分类方法作了说明与讨论。

对一组圆柱面网壳交叉组合形成的新型网壳结构——叉筒网壳中的单层脊线式叉筒网壳的结构性能进行了系统研究。运用有限元方法分析了该结构在对称与非对称荷载作用下的静力性能，并着重讨论了矢跨比、荷载工况、边界条件和几何初始缺陷对结构非线性稳定性能的影响。研究了不同矢跨比和不同屋面荷载作用下的结构自振特性，并比较了不同矢跨比结构在地震作用下的水平地震内力和竖向地震内力。研究结果表明，单层脊线式叉筒网壳受力性能良好，非对称荷载对结构性能的影响不大；矢跨比对结构的稳定极限荷载和动力性能影响较大；随几何初始缺陷的增大，结构稳定极限荷载平缓降低。