An online optimization method for bridge dynamic hybrid simulations

Yuan Sen Yang, Keh Chyuan Tsai, Amr S. Elnashai, Tung Ju Hsieh

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

An online optimization method was proposed in this paper to improve the accuracy of numerical-experimental hybrid simulations of bridges subjected to earthquake forces. The online optimization method aims to solve the problem induced by the inconsistency of the multiple identical bridge piers where only one or a few of them are simulated experimentally by physical specimens, while the others are numerically simulated within a hybrid framework. This method adopts multi-variable nonlinear optimization in order to find the optimal material parameters of the numerical models, and updates the numerical models instantaneously during the hybrid simulation. A numerical verification of a bridge hybrid simulation was conducted using the proposed online optimization method. The numerical results showed that the online optimization method is capable of obtaining better material parameters during the first few seconds of a hybrid simulation, which results in more accurate nonlinear dynamic response under earthquake loading.

Original languageEnglish (US)
Pages (from-to)42-54
Number of pages13
JournalSimulation Modelling Practice and Theory
Volume28
DOIs
StatePublished - Nov 1 2012

Fingerprint

Online Optimization
Hybrid Simulation
Dynamic Simulation
Optimization Methods
Earthquake
Numerical models
Earthquakes
Numerical Verification
Nonlinear Response
Nonlinear Optimization
Bridge piers
Dynamic Response
Inconsistency
Nonlinear Dynamics
Update
Dynamic response
Numerical Results

All Science Journal Classification (ASJC) codes

  • Software
  • Modeling and Simulation
  • Hardware and Architecture

Cite this

Yang, Yuan Sen ; Tsai, Keh Chyuan ; Elnashai, Amr S. ; Hsieh, Tung Ju. / An online optimization method for bridge dynamic hybrid simulations. In: Simulation Modelling Practice and Theory. 2012 ; Vol. 28. pp. 42-54.
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An online optimization method for bridge dynamic hybrid simulations. / Yang, Yuan Sen; Tsai, Keh Chyuan; Elnashai, Amr S.; Hsieh, Tung Ju.

In: Simulation Modelling Practice and Theory, Vol. 28, 01.11.2012, p. 42-54.

Research output: Contribution to journalArticle

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