Detail publikačního výsledku

Sensitivity Analysis of Stability Problems of Steel Structures using Shell Finite Elements and Nonlinear Computation Methods

KALA, Z.; KALA, J.

Originální název

Sensitivity Analysis of Stability Problems of Steel Structures using Shell Finite Elements and Nonlinear Computation Methods

Anglický název

Sensitivity Analysis of Stability Problems of Steel Structures using Shell Finite Elements and Nonlinear Computation Methods

Druh

Článek recenzovaný mimo WoS a Scopus

Originální abstrakt

The paper analyzes the influence of initial imperfections on the ultimate limit state of a slender strut, applying the ANSYS programme. The geometrical and material nonlinear finite element method was applied for the theoretical analysis. Modelling of the steel structure was performed using SHELL elements. The effect of input imperfections on the load-carrying capacity is evaluated by sensitivity analysis. This paper is devoted to a class of sensitivity analysis techniques that are known as the variance-based methods. Input imperfections are of random origin. The Sobol's sensitivity analysis was used to determine the sensitivity of load-carrying capacity of a strut with respect to the variance of initial imperfections. The sensitivity analysis results identify the imperfections the variability of which can influence the structure reliability. The Latin Hypercube Sampling method was applied for the evaluation of sensitivity indices. The computation model elaborated is unique with regard to its numerically demanding character.

Anglický abstrakt

The paper analyzes the influence of initial imperfections on the ultimate limit state of a slender strut, applying the ANSYS programme. The geometrical and material nonlinear finite element method was applied for the theoretical analysis. Modelling of the steel structure was performed using SHELL elements. The effect of input imperfections on the load-carrying capacity is evaluated by sensitivity analysis. This paper is devoted to a class of sensitivity analysis techniques that are known as the variance-based methods. Input imperfections are of random origin. The Sobol's sensitivity analysis was used to determine the sensitivity of load-carrying capacity of a strut with respect to the variance of initial imperfections. The sensitivity analysis results identify the imperfections the variability of which can influence the structure reliability. The Latin Hypercube Sampling method was applied for the evaluation of sensitivity indices. The computation model elaborated is unique with regard to its numerically demanding character.

Klíčová slova

Reliability, steel, structures, imperfections, stability, sensitivity analysis, shell elements.

Klíčová slova v angličtině

Reliability, steel, structures, imperfections, stability, sensitivity analysis, shell elements.

Autoři

KALA, Z.; KALA, J.

Rok RIV

2010

Vydáno

01.05.2009

ISSN

1991-8747

Periodikum

WSEAS TRANSACTIONS ON APPLIED AND THEORETICAL MECHANICS

Svazek

4

Číslo

3

Stát

Francouzská republika

Strany od

105

Strany do

114

Strany počet

10

Plný text v Digitální knihovně

http://hdl.handle.net/

BibTex

@article{BUT47357,
  author="Zdeněk {Kala} and Jiří {Kala}",
  title="Sensitivity Analysis of Stability Problems of Steel Structures using Shell Finite Elements and Nonlinear Computation Methods",
  journal="WSEAS TRANSACTIONS ON APPLIED AND THEORETICAL MECHANICS",
  year="2009",
  volume="4",
  number="3",
  pages="105--114",
  issn="1991-8747"
}