Abstract
In this study, simplified numerical models are developed to analyze the soil-structure interaction (SSI) effect on frame structures equipped with viscoelastic dampers (VEDs) based on pile group foundation. First, a single degree-of-freedom (SDOF) oscillator is successfully utilized to replace the SDOF energy dissipated structure considering the SSI effect. The equivalent period and damping ratio of the system are obtained through analogical analysis using the frequency transfer function with adoption of the modal strain energy (MSE) technique. A parametric analysis is carried out to study the SSI effect on the performance of VEDs. Then the equilibrium equations of the multi degree-of-freedom (MDOF) structure with VEDs considering SSI effect are established in the frequency domain. Based on the assumption that the superstructure of the coupled system possesses the classical normal mode, the MDOF superstructure is decoupled to a set of individual SDOF systems resting on a rigid foundation with adoption of the MSE technique through formula derivation. Numerical results demonstrate that the proposed methods have the advantage of reducing computational cost, however, retaining the satisfactory accuracy. The numerical method proposed herein can provide a fast evaluation of the efficiency of VEDs considering the SSI effect.
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Acknowledgement
The authors are grateful for the financial support from the Natural Science Foundation of China (Grant No. 51678302), the Natural Science Foundation of China(Grant No. 51678301), Jiangsu Province Industry-University-Research joint innovation fund—Prospective joint research project (Grant No. BY2014005-05) and Major Program of Natural Science Foundation of the Jiangsu Higher Education Institutions of China (Grant No. 14KJA560001).
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Supported by: National Natural Science Foundation of China under Grant Nos. 51678302 and 51678301, Jiangsu Province Industry-University-Research Joint Innovation Fund—Prospective Joint Research Project under Grant No. BY2014005-05 and Major Program of Natural Science Foundation of the Jiangsu Higher Education Institutions of China under Grant No. 14KJA560001.
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Zhao, X., Wang, S., Du, D. et al. Simplified analysis of frame structures with viscoelastic dampers considering the effect of soil-structure interaction. Earthq. Eng. Eng. Vib. 16, 199–217 (2017). https://doi.org/10.1007/s11803-017-0377-x
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DOI: https://doi.org/10.1007/s11803-017-0377-x