Influence of Viscous Damping Models on the Inelastic Response of Reinforced Concrete Columns and Bridges
Publication: Journal of Structural Engineering
Volume 149, Issue 2
Abstract
The appropriate estimation of displacements is crucial in performance-based design. Among the options to assess deformation demands, Nonlinear Time History Analysis (NLTHA) is the most sophisticated. However, previous research has shown that NLTHA is sensitive to the viscous damping model definition, and there is substantial disagreement in the engineering community regarding damping model choices. Thus, the goal of this paper is to show the impact of viscous damping model assumptions on the nonlinear response of bridges. A displacement sensitivity study was conducted on several multi-span bridges using various viscous damping models and earthquake records. The results indicate that the mean displacement varies as a function of the displacement ductility level and damping model. In order of ascending displacement demand, the Wilson-Penzien model had the lowest demands followed by the Rayleigh-Initial stiffness, Mass proportional, Rayleigh-Tangent stiffness, Tangent stiffness proportional damping, and Zero-damping. Also, this paper proposes a new viscous damping model. We expect these findings to help practitioners understand the implications of the choice of the damping model and guide the analyst when selecting damping parameters.
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Data Availability Statement
Inputs and output files from models and codes that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The first author is pleased to acknowledge MINCIENCIAS and the Fulbright Association in Colombia for a scholarship to pursue his Ph.D. studies in the United States. Financial support from NC State University and the Alaska Department of Transportation and Public Facilities is also gratefully appreciated.
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Information & Authors
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Published In
Journal of Structural Engineering
Volume 149 • Issue 2 • February 2023
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Oct 28, 2021
Accepted: Oct 7, 2022
Published online: Dec 6, 2022
Published in print: Feb 1, 2023
Discussion open until: May 6, 2023
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Cited by
- Diego R Martinez, Mervyn J Kowalsky, Nonlinear seismic performance of RC bridges using the ESA, EDA, DDBA, and nonlinear analysis with various viscous damping models, Earthquake Spectra, 10.1177/87552930221145435, 39, 1, (242-268), (2023).