Output-only identification of civil structures using nonlinear finite element model updating

Hamed Ebrahimian, Rodrigo Astroza, Joel P. Conte

Research output: Contribution to conferencePaper

Abstract

This paper presents a novel approach for output-only nonlinear system identification of structures using data recorded during earthquake events. In this approach, state-of-the-art nonlinear structural FE modeling and analysis techniques are combined with Bayesian Inference method to estimate (i) time-invariant parameters governing the nonlinear hysteretic material constitutive models used in the FE model of the structure, and (ii) the time history of the earthquake ground motion. To validate the performance of the proposed framework, the simulated responses of a bridge pier to an earthquake ground motion is polluted with artificial output measurement noise and used to jointly estimate the unknown material parameters and the time history of the earthquake ground motion. This proof-of-concept example illustrates the succeßful performance of the proposed approach even in the presence of high measurement noise.
Original languageAmerican English
DOIs
StatePublished - 1 Jan 2015
Externally publishedYes
EventProceedings of SPIE - The International Society for Optical Engineering -
Duration: 1 Jan 2019 → …

Conference

ConferenceProceedings of SPIE - The International Society for Optical Engineering
Period1/01/19 → …

Keywords

  • Bayesian inference
  • Blind identification
  • Civil structure
  • Damage identification
  • Finite element model updating
  • Health monitoring
  • Nonlinear finite element model
  • Nonlinear system
  • Nonlinear system identification
  • Output only estimation

Fingerprint Dive into the research topics of 'Output-only identification of civil structures using nonlinear finite element model updating'. Together they form a unique fingerprint.

Cite this