Nonlinear structural finite element model updating and uncertainty quantification

Hamed Ebrahimian; Rodrigo Astroza; Joel P. Conte

doi:10.1117/12.2084541

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1 April 2015 Nonlinear structural finite element model updating and uncertainty quantification

Hamed Ebrahimian, Rodrigo Astroza, Joel P. Conte

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Proceedings Volume 9437, Structural Health Monitoring and Inspection of Advanced Materials, Aerospace, and Civil Infrastructure 2015; 943716 (2015) https://doi.org/10.1117/12.2084541
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2015, San Diego, California, United States

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.

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Hamed Ebrahimian, Rodrigo Astroza, and 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); https://doi.org/10.1117/12.2084541

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