| 张敏,庞华英.设置粘弹性阻尼耗能框架结构减震性能分析[J].计算力学学报,2019,36(6):739~746 |
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| 设置粘弹性阻尼耗能框架结构减震性能分析 |
| Damping performance analysis of energy dissipation frame structure with viscoelastic damper |
| 投稿时间：2018-10-16 修订日期：2018-12-21 |
| DOI：10.7511/jslx20181016002 |
| 中文关键词: 框架 阻尼器 频域 松弛时间系数 阻尼 傅里叶变换 |
| 英文关键词:frame damper frequency domain relaxation time coefficient damping Fourier transform |
| 基金项目: |
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| 摘要点击次数: 913 |
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| 中文摘要: |
| 研究粘弹性阻尼器对框架结构的减震性能，分析该阻尼器的阻尼参数对框架结构地震反应的影响，给出设置阻尼器后结构地震作用的计算方法。对设置粘弹性阻尼器框架结构振动方程进行傅里叶变换，求解该振动方程的频域解，再通过傅里叶逆变换得出该方程的时域解，由此研究阻尼器的阻尼系数Cd和松弛时间系数η等对结构地震响应的影响。在此基础上，提出粘弹性阻尼器的阻尼系数在各楼层经济分布的实用计算公式，并对设置粘弹性阻尼器框架结构地震作用给出计算方法，分析结构各楼层的地震作用及结构各振型的底部剪力。研究表明，设置于框架结构的粘弹性阻尼器宜控制其松弛时间系数η≤0.5~0.7。 |
| 英文摘要: |
| Damping performance of a frame structure with viscoelastic dampers is studied,influence of the damping parameter on its seismic performance is analyzed,and the calculation method of the seismic action of the structure is presented in this paper.The Fourier transform is applied to the vibration equation of the frame structure with viscoelastic damper,the frequency domain solution of the vibration equation is solved,and the time domain solution of the equation is obtained by inverse Fourier transform,from which the effect of damping coefficient Cd and relaxation time coefficient η of the damper on the seismic response of the structure is analyzed.On this basis,a practical formula for calculating the economic distribution of the damping coefficient of viscoelastic dampers on each floor is proposed.In addition,the calculation method for the seismic action of the frame structure with viscoelastic dampers is given.From this,the seismic action of each floor and the bottom shear force of each vibration mode of the structure are analyzed,which indicates that the relaxation time coefficient η≤ 0.5~0.7 of the dampers installed in the frame structure should be controlled. |
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