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simplified analysis of frame structures with viscoelastic dampers considering the effect of soil-structure interaction

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Earthquake Engineering and Engineering Vibration 2017年第1期16卷 199-217页

作者： Zhao Xuefei Wang Shuguang Du Dongsheng Liu Weiqing College of Civil Engineering Nanjing Tech University Nanjing 210009 China

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. Aparametric 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.

关键词： viscoelastic damper soil-structure interaction MSE technique frequency domain simplified analysis

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Comparison between experimental and analytical results for seesaw energy dissipation systems using fluid viscous dampers

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Earthquake Engineering and Engineering Vibration 2016年第1期15卷 79-90页

作者： Jae-Do Kang Hiroshi Tagawa Hyogo Earthquake Engineering Research Center National Research Institute for Earth Science and Disaster Prevention Graduate School of Engineering Hiroshima University

This paper presents results of experimental and numerical investigations of a seesaw energy dissipation system （SEDS） using fluid viscous dampers （FVDs）. To confirm the characteristics of the FVDs used in the tests, harmonic dynamic loading tests were conducted in advance of the flee vibration tests and the shaking table tests. Shaking table tests were conducted to demonstrate the damping capacity of the SEDS under random excitations such as seismic waves, and the results showed SEDSs have sufficient damping capacity for reducing the seismic response of flames. Free vibration tests were conducted to confirm the reliability of simplified analysis. Time history response analyses were also conducted and the results are in close agreement with shaking table test results.

关键词： seesaw energy dissipation system experimental verification shaking table test simplified analysis dynamiccharacteristic

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