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Tests and Micro–Macro Cross-Scale Model of High-Performance Acrylate Viscoelastic Dampers Used in Structural Resistance
| 题名： | Tests and Micro–Macro Cross-Scale Model of High-Performance Acrylate Viscoelastic Dampers Used in Structural Resistance |
| 正文语种： | eng |
| 作者： | Yao-Rong Dong;Zhao-Dong Xu;Qiang-Qiang Li;Zhen-Hua He;Xiao Yan;Yu Cheng |
| 作者单位： | Xi’an Univ. of Architecture and Technology;Southeast Univ.;Southeast Univ.;Xi’an Univ. of Architecture and Technology;Xi’an Univ. of Architecture and Technology;Hubei Univ. of Arts and Science |
| 关键词： | High-performance acrylate viscoelastic damper (HAVED);Dynamic mechanical performance;Microscopic molecular chains;Micro–macro cross-scale model |
| 摘要： | Abstract This study aims to develop a high-performance acrylate viscoelastic damper (HAVED), which is suitable for the low-frequency vibration control of building structures. To reveal the influence of ambient temperature, excitation frequency, and displacement amplitude on the dynamic mechanical performance and energy dissipation capacity of a HAVED, a series of dynamic mechanical performance tests were performed on a HAVED within the extensive temperature (10°C–50°C), frequency (0.1–3 Hz), and displacement (0.5–4 mm) range. The analysis results show that a HAVED has excellent energy dissipation capacity and good adaptability to the external environment. The loss factor of a HAVED can reach up to 1.85, and it remains above 0.28 even in a high-temperature environment of 50°C. The dynamic mechanical properties and energy dissipation capacity of a HAVED show strong dependences and obvious coupling effects on temperature, frequency, and displacement amplitude. Based on the experimental research of a HAVED, the micromechanical properties of viscoelastic materials are analyzed, and the high-order fractional derivative model is used to comprehensively describe the mechanical characterization of microscopic molecular chains. The Kraus theory is introduced to consider the influence of filler particles, and the high-order fractional derivative micro–macro cross-scale mathematical model is proposed by combining with the temperature-frequency equivalence principle. Through the experimental results, the prediction capabilities of the model that have been established have been verified. The analysis results show that the proposed model can comprehensively describe the influence of ambient temperature, excitation frequency, displacement amplitude, microscopic molecular chain structure, and filler particles on the mechanical properties of a HAVED. |
| 出版年： | 2023 |
| 期刊名称： | Journal of structural engineering |
| 卷： | 149 |
| 期： | 7 |
| 页码： | 04023088.1-04023088.17 |
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