An integrated local damping approach for enhanced characterization of nonlinear dynamic response

Type of content
Conference Contributions - Other
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Date
2020
Authors
De Francesco G
Sullivan, T J
Abstract

This paper develops a simplified local damping approach for use in the nonlinear dynamic analysis of structures so that different energy dissipation mechanisms can be integrated. It is argued that a local damping approach allows the analyst to control the dissipative mechanisms introduced and check they are meaningful. Furthermore, a local damping approach offers the opportunity for different damping mechanisms to be integrated in the same model and independently specified, signaling a departure from the use of purely viscous damping models. An initial strategy for specifying damping within the integrated local damping framework is proposed, based on providing consistency between the response obtained using local and global viscous damping formulations, for both initial and tangent stiffness proportional damping models. Guidance on the use of such a local damping approach is provided for the characterization of a series of simple case study bridge structures and non-linear dynamic analyses are used to highlight the impact of the new approach.

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Citation
De Francesco G (2020). An integrated local damping approach for enhanced characterization of nonlinear dynamic response. Sendai International Center, Sendai, Japan: 17WCEE, The 17th World Conference on Earthquake Engineering. 27/09/2021-02/10/2021.
Keywords
local damping models, tangent-stiffness viscous damping, large displacement analysis, nonlinear analysis
Ngā upoko tukutuku/Māori subject headings
ANZSRC fields of research
Fields of Research::40 - Engineering::4005 - Civil engineering::400506 - Earthquake engineering
Fields of Research::40 - Engineering::4005 - Civil engineering::400509 - Structural dynamics
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All rights reserved unless otherwise stated