Publication detail

Two Stochastic Methods to Model Initial Geometrical Imperfections of Steel Frame Structures

JINDRA, D. KALA, Z. KALA, J.

Original Title

Two Stochastic Methods to Model Initial Geometrical Imperfections of Steel Frame Structures

Type

journal article in Web of Science

Language

English

Original Abstract

The stochastic modeling of geometrically imperfect steel frame structures requires statistical inputs for imperfection parameters, often with specific mutual correlations. The stochastic input values of geometrical imperfections are derived from European Standard EN 1090-2:2018 tolerance criteria. Two advanced stochastic methods, #RSS (random storey sway) and #RSP (random storey position), are developed based on these criteria. This paper presents a verification study, using random sampling simulations, for these two stochastic methods (#RSS and #RSP) to directly model the initial global geometrical imperfections of steel frame structures. The proposed methods have been verified for structures with equidistant storey heights and for those comprising up to 24 storeys, making them applicable to a wide range standard steel frame structures. It has been found that the performance of the #RSS method is satisfactory. An advantage of #RSS is that the random parameters are statistically independent. On the other hand, the #RSP method requires the definition of these mutual correlations in order to satisfy the criterion that 95 percent of random realizations of initial imperfections fall within the tolerance limits of the corresponding European Standard. The #RSP method, however, might have certain advantages for structures with a larger number of storeys (above 24), as closely discussed in this study. Additionally, this study provides useful provisions for the advanced numerical analyses of multi-storey steel frames of various geometries.

Keywords

Correlations; Erection Tolerances; First order Reliability Method; Initial Geometrical Imperfections; Multi-Storey Steel Frames

Authors

JINDRA, D.; KALA, Z.; KALA, J.

Released

12. 1. 2024

Publisher

MDPI

Location

Basel

ISBN

2075-5309

Periodical

Buildings

Year of study

14

Number

1

State

Swiss Confederation

Pages from

1

Pages to

16

Pages count

16

URL

https://www.mdpi.com/2075-5309/14/1/196

Full text in the Digital Library

http://hdl.handle.net/11012/245217

BibTex

@article{BUT187158,
  author="Daniel {Jindra} and Zdeněk {Kala} and Jiří {Kala}",
  title="Two Stochastic Methods to Model Initial Geometrical Imperfections of Steel Frame Structures",
  journal="Buildings",
  year="2024",
  volume="14",
  number="1",
  pages="1--16",
  doi="10.3390/buildings14010196",
  issn="2075-5309",
  url="https://www.mdpi.com/2075-5309/14/1/196"
}