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Critical issues in parameter calibration of cyclic models for steel members

Chisari, Corrado
•
Francavilla, Antonella B.
•
Latour, Massimo
altro
Amadio, Claudio
2017
  • journal article

Periodico
ENGINEERING STRUCTURES
Abstract
Accurate response predictions of steel structures subjected to earthquake loading involve the use of models able to simulate properly the cyclic behaviour of the regions where nonlinear phenomena take place. In case of full-strength joints, they are represented by the members connected, which may present softening response due to local buckling. Even though a number of phenomenological models have been developed in the last decades, their calibration seems to have received less attention. Usually, calibration is based on matching the experimental and numerical cyclic responses under loading protocols proposed by standards. Since these were not developed to this aim, the predictive capability of so calibrated models deserves investigation. In this work, a calibration procedure based on the minimisation of response misfit is presented and critically discussed, with reference to an experimental programme carried out at the University of Salerno. Different assumptions about the function to minimise, the ultimate rotation and number of objectives are compared and analysed. The main outcome of this investigation is that a calibration based on cyclic response only is not robust, since its accuracy under different loading conditions may deteriorate. The introduction of the monotonic test in a multi-objective framework may be effective, and its accuracy is confirmed by the results of pseudo-dynamic tests.
DOI
10.1016/j.engstruct.2016.11.030
WOS
WOS:000392165200010
Archivio
http://hdl.handle.net/11368/2926583
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84996606891
https://www.sciencedirect.com/science/article/pii/S0141029616312603
Diritti
open access
FVG url
https://arts.units.it/request-item?handle=11368/2926583
Soggetti
  • Genetic Algorithm

  • Hysteretic model

  • Multi-objective optim...

  • Pseudo-dynamic test

  • Strength degradation

  • Civil and Structural ...

Scopus© citazioni
44
Data di acquisizione
Jun 15, 2022
Vedi dettagli
Web of Science© citazioni
40
Data di acquisizione
Mar 20, 2024
Visualizzazioni
2
Data di acquisizione
Apr 19, 2024
Vedi dettagli
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