Nonlinear structural finite element model updating and uncertainty quantification

Hamed Ebrahimian; Rodrigo Astroza; Joel P. Conte

doi:10.1117/12.2084541

Abstract

This paper presents a framework for nonlinear finite element (FE) model updating, in which state-of-the-art nonlinear structural FE modeling and analysis techniques are combined with the maximum likelihood estimation method (MLE) to estimate time-invariant parameters governing the nonlinear hysteretic material constitutive models used in the FE model of the structure. The estimation uncertainties are evaluated based on the Cramer–Rao lower bound (CRLB) theorem. A proof-of-concept example, consisting of a cantilever steel column representing a bridge pier, is provided to verify the proposed nonlinear FE model updating framework.

Citation Download Citation

Hamed Ebrahimian, Hamed Ebrahimian, Rodrigo Astroza, Rodrigo Astroza, Joel P. Conte, Joel P. Conte, "Nonlinear structural finite element model updating and uncertainty quantification", Proc. SPIE 9437, Structural Health Monitoring and Inspection of Advanced Materials, Aerospace, and Civil Infrastructure 2015, 943716 (1 April 2015); doi: 10.1117/12.2084541; https://doi.org/10.1117/12.2084541

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