Sensitivity assessment of steel members under compression
Sensitivity assessment of steel members under compression
复制标题
DOI：
10.1016/j.engstruct.2008.04.001
复制
发表时间：
2009-06-01
影响因子：
5.5
通讯作者：
Kala, Zdenek
中科院分区：
文献类型：
--
作者：
Kala, Zdenek
本文的目的是分析初始缺陷对钢构件受压性能的影响。通过灵敏度分析计算了初始缺陷变异对所研究的承载能力变异的影响。介绍了Sobol灵敏度分析的优点和Sobol灵敏度指标的主要性质。Sobol的一阶灵敏度指标是根据无量纲长细度来计算的。索博尔的灵敏度指标补充了基于蒙特卡罗方法的清晰阐述。将IPE 220钢构件的材料和几何特性视为随机量，并通过实验得到其直方图。确定了对承载能力有主要影响的缺陷。(C) 2008 Elsevier Ltd版权所有。
The objective of the paper is to analyse the influence of initial imperfections on the behaviour of a steel member under compression. The influence of the variability of initial imperfections on the variability of the load-carrying capacity studied has been calculated by sensitivity analysis. The advantages of Sobol's sensitivity analysis and the most important properties of Sobol's sensitivity indices are described. The Sobol's first order sensitivity indices are evaluated in dependence on the nondimensional slenderness. The Sobol's sensitivity indices are supplemented with a lucid elaboration based on the Monte Carlo method. Material and geometrical characteristics of a steel member IPE 220 were considered to be random quantities the histograms of which were obtained from experiments. imperfections that have a dominant influence on the load-carrying capacity are identified. (C) 2008 Elsevier Ltd. All rights reserved.