New Approach to Designing Multilayer Feedforward Neural Network Architecture for Modeling Nonlinear Restoring Forces. I: Formulation
Publication: Journal of Engineering Mechanics
Volume 132, Issue 12
Abstract
This paper addresses the modeling problem of nonlinear and hysteretic dynamic behaviors through a constructive modeling approach which exploits existing mathematical concepts in artificial neural network modeling. In contrast with many neural network applications, which often result in large and complex “black-box” models, here, the writers strive to produce phenomenologically accurate model behavior starting with network architecture of manageable/small sizes. This affords the potential of creating relationships between model parameter values and observed phenomenological behaviors. Here a linear sum of basis functions is used in modeling nonlinear hysteretic restoring forces. In particular, nonlinear sigmoidal activation functions are chosen as the core building block for their robustness in approximating arbitrary functions. The appropriateness and effectiveness of this set of basis function in modeling a wide variety of nonlinear dynamic behaviors observed in structural mechanics are depicted from an algebraic and geometric perspective.
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Acknowledgments
This study was supported in part by the National Science Foundation under Grant No. NSFSGER CMS-0332350 for the first writer and CAREER Award No. NSFCMS-0134333 for the second writer. Professor Joseph P. Wright at the Applied Science Division, Weidlinger Associates Inc. is deeply acknowledged by the writers for numerous valuable discussions, detailed reading, and feedback on the manuscript when this work was initially developed.
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© 2006 ASCE.
History
Received: Oct 15, 2003
Accepted: Apr 26, 2005
Published online: Dec 1, 2006
Published in print: Dec 2006
Notes
Note. Associate Editor: Gerhart I. Schueller
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