Publication detail

Reliability-based optimization of a prestressed concrete roof girder using a surrogate model and the double-loop approach

SLOWIK, O. LEHKÝ, D. NOVÁK, D.

Original Title

Reliability-based optimization of a prestressed concrete roof girder using a surrogate model and the double-loop approach

Type

journal article in Web of Science

Language

English

Original Abstract

The paper describes the reliability-based optimization of a TT-shaped precast roof girder produced in Austria. An extensive experimental programme was performed using laboratory specimens to gain information on the mechanical fracture parameters of the utilized concrete. Subsequently, destructive shear tests were performed on scaled-down and full-scale girders under laboratory conditions. The experiments helped in the development of an accurate numerical model of the girder. The developed model was consequently used for the advanced stochastic analysis of structural response, followed by reliability-based optimization, which was used to maximize the shear and bending capacities of the girder and minimize production cost under defined reliability constraints. The enormous computational requirements of the double-loop optimization approach were significantly reduced by the utilization of an artificial neural network-based surrogate model instead of the original nonlinear finite element model of the optimized structure.

Keywords

artificial neural network, combinatorial optimization, double-loop reliability-based optimization, heuristic optimization, mechanical fracture parameters, prestressed concrete girder, shear failure, stochastic analysis

Authors

SLOWIK, O.; LEHKÝ, D.; NOVÁK, D.

Released

1. 8. 2021

Publisher

John Wiley and Sons Inc

ISBN

1464-4177

Periodical

Structural Concrete

Year of study

22

Number

4

State

Federal Republic of Germany

Pages from

2184

Pages to

2201

Pages count

18

URL

https://onlinelibrary.wiley.com/doi/10.1002/suco.202000455

BibTex

@article{BUT172473,
  author="Ondřej {Slowik} and David {Lehký} and Drahomír {Novák}",
  title="Reliability-based optimization of a prestressed concrete roof girder using a surrogate model and the double-loop approach",
  journal="Structural Concrete",
  year="2021",
  volume="22",
  number="4",
  pages="2184--2201",
  doi="10.1002/suco.202000455",
  issn="1464-4177",
  url="https://onlinelibrary.wiley.com/doi/10.1002/suco.202000455"
}