Abstract
Studied are the hysteretic force–deformation response of large-scale nonlinear viscous dampers and model of the response for use in numerical simulations and seismic design. The force–deformation response of nonlinear viscous dampers with a force capacity of 600 kN are characterized under sinusoidal loading. A wide range of amplitudes and frequencies are used in the characterization tests. A nonlinear Maxwell model is presented for modeling the force–deformation response of large-scale nonlinear viscous dampers for use in nonlinear response history analyses. This paper also presents an equivalent linear model for the force–deformation response of a nonlinear viscous damper in-series with the elastic bracing and connection components needed to connect the damper to a building structure. The equivalent linear model enables the effects of the elastic flexibility of structural components on the response of the damper-brace component to be considered in seismic design. Results from tests on a 0.6-scale three-story structure with nonlinear viscous dampers validated the predictive accuracy of the equivalent linear model. Also evaluated are the effects of the elastic flexibility of structural components (e.g., bracing and connection) on the effective stiffness and damping ratio of a building structure with nonlinear viscous dampers.
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Acknowledgements
The National Science Foundation under the George E. Brown, Jr. Network for earthquake engineering simulation research (NEESR) program is acknowledged for a grant (Award No. CMS-0936610) to support the experimental work performed at the NHERI Lehigh University Real-Time Multi-Directional (RTMD) earthquake simulation facility. The analytical work reported in this paper was performed by the first author and supported by grants from the National Natural Science Foundation of China (Award No. 52078385) and the Science and Technology Commission of Shanghai Municipality (Pujiang Program: 20PJ1414000). The opinions, findings, and conclusions expressed in this paper are those of the authors and do not necessarily reflect the views of those acknowledged here.
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Dong, B., Sause, R. & Ricles, J.M. Modeling of nonlinear viscous damper response for analysis and design of earthquake-resistant building structures. Bull Earthquake Eng 20, 1841–1864 (2022). https://doi.org/10.1007/s10518-021-01306-7
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DOI: https://doi.org/10.1007/s10518-021-01306-7