Generalised capacity curves for stability and plasticity: Application and limitations
Generalised capacity curves for stability and plasticity: Application and limitations
复制标题
稳定性和塑性的广义容量曲线：应用和限制
DOI：
10.1016/j.tws.2011.04.005
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发表时间：
2011
影响因子：
6.4
通讯作者：
J. Rotter
中科院分区：
文献类型：
--
作者：
Cornelia Doerich;J. Rotter
近几十年来，结构的阻力被认为是由具有明确模型缺陷（GMNIA）的几何和材料非线性分析的结果来定义的。但当这是对复杂结构系统进行的唯一分析时，有时很难解释结果。必须在更简单的分析背景下看待结果，这些分析可以定义适当的参考量。其他分析，如小位移理论材料非线性分析 (MNA) 和线性弹性分岔分析 (LBA) 在 GMNIA 的解释中非常重要。欧洲规范中壳结构 [1] 的一般能力曲线提供了这些不同分析的表示。使用该容量曲线，可以独立研究结构行为的不同可识别关键方面，并理解与该曲线相应参数的关系。这种统一的表示可以对所有弹塑性屈曲问题进行简单且有意义的表征。但是，将这种广义曲线应用于具有特定特征的结构时需要小心。本文概述了该曲线最简单版本的局限性，并开发了一种增强功能，使其可以不受限制地部署。
In recent decades, the resistance of a structure has been thought of as well defined by the outcome of a geometrically and materially nonlinear analysis with explicitly modelled imperfections (GMNIA). But when this is the only analysis that is performed on a complex structural system, it is sometimes difficult to interpret the result. The outcome must be seen in the context of those from simpler analyses, which can define appropriate reference quantities.Other analyses, like a small displacement theory materially nonlinear analysis (MNA) and a linear elastic bifurcation analysis (LBA) are very important in the interpretation of a GMNIA.The general capacity curve in the Eurocode for shell structures [1] provides a representation of these different analyses. Using this capacity curve, different identifiable key aspects of the structure's behaviour can be studied independently and understood in relation to the corresponding parameter of this curve. This unified representation allows an easy and meaningful characterisation of all elastic–plastic buckling problems.However, some care is needed when applying such a generalised curve to structures with particular features. This paper outlines the limitations of the simplest version of the curve, and develops an enhancement that permits it to be deployed without restriction.