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Influence of Viscous Damping Models on the Inelastic Response of Reinforced Concrete Columns and Bridges
| 题名： | Influence of Viscous Damping Models on the Inelastic Response of Reinforced Concrete Columns and Bridges |
| 正文语种： | eng |
| 作者： | Diego R. Martinez;Mervyn J. Kowalsky |
| 作者单位： | INGETEC Ingeniería y Diseño S.A.S.;North Carolina State Univ. |
| 关键词： | Viscous damping models;Nonlinear analysis;RC columns;RC bridges;Lumped plasticity models |
| 摘要： | 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. |
| 出版年： | 2023 |
| 期刊名称： | Journal of structural engineering |
| 卷： | 149 |
| 期： | 2 |
| 页码： | 04022246.1-04022246.12 |
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