Tests and Modeling of Viscoelastic Damper Considering Microstructures and Displacement Amplitude Influence
Publication: Journal of Engineering Mechanics
Volume 145, Issue 12
Abstract
Viscoelastic dampers are a kind of energy-dissipation device with good damping performance. They are also extensively utilized in earthquake mitigation for structures in civil engineering. In the present work, mechanical behavior tests of a viscoelastic damper are conducted with varying loading frequencies and excitation displacement amplitudes. The results demonstrate that viscoelastic dampers have a high damping performance. The micromorphological structures of the viscoelastic material are investigated with scanning electron microscope (SEM) technology. A new mathematical model for viscoelastic materials, the equivalent fractional-order microstructure Zener (EFMS-Zener) model, is formulated depending on the micromolecular structures and the amplitude-temperature equivalent principle. The EFMS-Zener model is validated with test data, which show that the newly formulated model can accurately reflect the mechanical performance and damping capability of a viscoelastic damper, which are importantly influenced by loading frequency and excitation displacement.
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Acknowledgments
The authors sincerely appreciate the support from the National Key R&D Programs of China (Grant Nos. 2016YFE0200500 and 2016YFE0119700), the Jiangsu Province International Cooperation Project (Grant No. BZ2018058), the National Science Fund for Distinguished Young Scholars (Grant No. 51625803), the Program of Chang Jiang Scholars of Ministry of Education, National Natural Science Foundation of China (Grant No. 11572088), and the Priority Academic Program Development of Jiangsu Higher Education Institutions.
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Published In
Journal of Engineering Mechanics
Volume 145 • Issue 12 • December 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Feb 19, 2019
Accepted: Apr 10, 2019
Published online: Sep 30, 2019
Published in print: Dec 1, 2019
Discussion open until: Feb 29, 2020
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