Detail publikace

Geometrically Non-linear Finite Element Reliability Analysis of Steel Plane Frames With Initial Imperfections

KALA, Z.

Originální název

Geometrically Non-linear Finite Element Reliability Analysis of Steel Plane Frames With Initial Imperfections

Typ

článek v časopise - ostatní, Jost

Jazyk

angličtina

Originální abstrakt

The random load carrying capacity of steel plane frames with bracing stiffness is studied in the presented article. The load carrying capacity is evaluated using the geometrically non-linear FEM analysis. The incremental stiffness matrix of a slightly curved element utilized in the non-linear incremental analysis is listed. Initial imperfections are considered as random variables. Statistical analysis and Sobols sensitivity analysis are performed using the Latin Hypercube Sampling method. The effect of initial random imperfections on the load carrying capacity is studied, whilst assuming constant non-dimensional slenderness of the columns. The evaluation parameter is the pair of non-random values of elastic bracing stiffness and system length of the columns. The paper illustrates that the load carrying capacity is very sensitive to the initial crookedness (bow imperfections) of the columns in the event that the non-sway (symmetric) and sway (anti-symmetric) buckling modes coincide. In this case, the design load carrying capacity obtained from statistical analysis according to the EN1990 standard is relatively very small (of low safety). Results show that the reliability of design of a steel frame according to EUROCODE 3 is significantly misaligned. The significance of the first and second buckling forces as indicators of sensitivity of the load carrying capacity to the imperfections is discussed in the conclusion of the article.

Klíčová slova

frame, steel, stability, strength, imperfections, failure, nonlinear, limit states, reliability, design.

Autoři

KALA, Z.

Rok RIV

2012

Vydáno

13. 7. 2012

Nakladatel

Taylor and Francis

ISSN

1392-3730

Periodikum

Journal of civil engineering and management

Ročník

18

Číslo

1

Stát

Litevská republika

Strany od

81

Strany do

90

Strany počet

10

BibTex

@article{BUT97306,
  author="Zdeněk {Kala}",
  title="Geometrically Non-linear Finite Element Reliability Analysis of Steel Plane Frames With Initial Imperfections",
  journal="Journal of civil engineering and management",
  year="2012",
  volume="18",
  number="1",
  pages="81--90",
  issn="1392-3730"
}