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黏滞阻尼器耗能贡献与速度响应有关,传统静力非线性分析方法(Pushover)由于无法反应结构瞬态,故无法考虑黏滞阻尼器的贡献。建议用性能点位移计算阻尼器贡献,并将其等效为结构阻尼进行结构设计。通过反复迭代直至性能点处有效阻尼比数值稳定,从而在Pushover中考虑黏滞阻尼器的贡献。使用本方法可方便计算结构在多遇地震下黏滞阻尼器的贡献,合理进行设计反应谱分析并评估结构性态,为复杂结构方案设计定型和优化提供一套有效方法。借鉴试验中常用的自由衰减振动测定结构阻尼比的方法,使用数值加载方法进行计算,所得的阻尼比与本文计算结果十分相近。按现行规范选取6条地震波,并按本文方法设定的黏滞阻尼器方案进行的多遇地震下非线性动力时程分析表明,合理考虑黏滞阻尼器贡献,可能直接影响到结构侧移合格的结论。
The energy dissipation contribution of the viscous damper is related to the speed response. The conventional static nonlinear analysis method (Pushover) cannot consider the contribution of the viscous damper because it cannot respond to the structural transient. It is suggested that the contribution of the damper be calculated by the displacement of the performance point, and the structural design be equivalent to the structural damping. By repeatedly iterating until the effective damping ratio value at the performance point is stable, the contribution of the viscous damper is considered in Pushover. This method can be used to calculate the contribution of the viscous damper to the structure under multiple earthquakes, calculate the response spectrum of the design and evaluate the structural behavior, and provide an effective method for designing and optimizing the complex structure. The method of determining the structural damping ratio by using the free-attenuating vibration commonly used in the experiment is calculated using the numerical loading method. The obtained damping ratio is very similar to the calculation result of this paper. The nonlinear dynamical time history analysis of six seismic waves selected according to the current specifications and subjected to the viscous damper scheme set by this method shows that a reasonable consideration of the contribution of the viscous damper may directly affect the qualified lateral displacement of the structure. The conclusion.