Influence of geometrical imperfections and residual stresses on the reliability of high strength steel welded I-section columns using Monte Carlo simulation

Ferreira Filho, José Osvaldo; da Silva, Luís Simões; Tankova, T.; Carvalho, Hermes

doi:10.1016/j.jcsr.2024.108548

Influence of geometrical imperfections and residual stresses on the reliability of high strength steel welded I-section columns using Monte Carlo simulation

Title

Influence of geometrical imperfections and residual stresses on the reliability of high strength steel welded I-section columns using Monte Carlo simulation

Author

Ferreira Filho, José Osvaldo (Universidade de Coimbra)
da Silva, Luís Simões (Universidade de Coimbra)
Tankova, T. (TU Delft Steel & Composite Structures)
Carvalho, Hermes (Universidade Federal de Minas Gerais; Universidade de São Paulo)

Date

2024

Abstract

This paper aims to assess the influence of geometrical imperfections and residual stresses on the reliability of the stability design rules for steel columns in Eurocode 3 considering a full probabilistic approach and further validate the new buckling curves in the scope of the ongoing revision of the Structural Eurocodes. A reliability assessment of major- and minor-axis flexural buckling of high-strength steel (HSS) welded I-section columns was performed, considering all basic variables as random, including the geometrical and material imperfections, in addition to the material properties of steel and the geometry of the cross-section. An advanced finite element model calibrated with experimental test results is used to perform a very large (290,126 simulations) parametric study covering the majority of practical geometries. Subsequently, Monte Carlo simulation is used to estimate the design values of the buckling resistance that correspond to the target probability of failure of the Eurocodes. Finally, these values are compared to the proposed buckling curves for HSS columns, showing good agreement and supporting their adoption in the revised EN 1993–1-1. It is also concluded that it is on the safe side to carry out a reliability assessment with deterministic reference values for structural imperfections.

Subject

Buckling resistance of columns
Eurocode 3
High strength steel
Monte Carlo simulation
Reliability analysis

To reference this document use:

http://resolver.tudelft.nl/uuid:a311fa47-f645-4c2e-b5b4-0c80c4518777

DOI

https://doi.org/10.1016/j.jcsr.2024.108548

ISSN

0143-974X

Source

Journal of Constructional Steel Research, 215

Part of collection

Institutional Repository