Detail publikace

PILOT COMPARISON OF SEMI-PROBABILISTIC METHODS APPLIED TO RC STRUCTURES WITH MULTIPLE FAILURE MODES

SÝKORA, M. NADOLSKI, V. NOVÁK, L. NOVÁK, D. DIAMANTIDIS, D.

Originální název

PILOT COMPARISON OF SEMI-PROBABILISTIC METHODS APPLIED TO RC STRUCTURES WITH MULTIPLE FAILURE MODES

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

Non-linear finite element analysis (NLFEA) represents a powerful tool for researchers and engineers. Validated NLFEA provides an advanced approach that should be combined with adequate considerations of variability of material and geometrical parameters to provide a realistic description of complex structural systems. As coupling NLFEA with a fully probabilistic reliability analysis is often highly time-consuming, the engineering practice prefers using simplified semi-probabilistic methods. The key aspect in semi-probabilistic approaches is an estimation of coefficient of variation (ECoV) of structural resistance. In recent years, ECoV methods have been considerably developed, accompanied by some industrial applications. This contribution provides a critical comparison of well-known ECoV methods with the recently proposed modification using the Taylor Series Expansion and its adaptation referred to as Eigen ECoV. Selected fundamental situations, representative for systems including concrete columns, are analysed considering also the standard partial factor method (PFM). The obtained results suggest that the PFM, ECoV and its recent improvement Eigen ECoV may provide slightly conservative or unsafe estimates in the cases with multiple failure modes; the associated errors up to 10% are deemed to be of moderate importance for practice. These errors can be reduced by using the TSE or Latin Hypercube Sampling (LHS). The observed errors are attributed to the failure in identifying the type of the distribution of system resistance and to the errors in estimating the mean value and coefficient of variation of the system resistance. The errors of all methods may increase when a strongly non-lognormal distribution of the system resistance and/ or statistical correlation amongst important basic variables are inadequately considered

Klíčová slova

Semi-probabilistic approach, reliability analysis, statistical analysis, concrete structures

Autoři

SÝKORA, M.; NADOLSKI, V.; NOVÁK, L.; NOVÁK, D.; DIAMANTIDIS, D.

Vydáno

12. 6. 2022

Nakladatel

fib. The International Federation for Structural Concrete

Místo

Oslo, Norway

ISBN

978-2-940643-15-8

Kniha

Concrete Innovation for Sustainability Proceedings for the 6th fib International Congress 2022

Strany počet

10

BibTex

@inproceedings{BUT180353,
  author="SÝKORA, M. and NADOLSKI, V. and NOVÁK, L. and NOVÁK, D. and DIAMANTIDIS, D.",
  title="PILOT COMPARISON OF SEMI-PROBABILISTIC METHODS APPLIED TO RC STRUCTURES WITH MULTIPLE FAILURE MODES",
  booktitle="Concrete Innovation for Sustainability Proceedings for the 6th fib International Congress 2022",
  year="2022",
  pages="10",
  publisher="fib. The International Federation for Structural Concrete",
  address="Oslo, Norway",
  isbn="978-2-940643-15-8"
}