设置黏滞性阻尼器结构的静力非线性方法研究
发布时间：2018-10-25 20:44
【摘要】：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。
[Abstract]:The energy dissipation contribution of viscous damper is related to the velocity response. The traditional static nonlinear analysis method (Pushover) can not consider the contribution of viscous damper because it can not respond to the transient of the structure. It is suggested that the damper contribution be calculated by the displacement of the performance point and be equivalent to the structural damping for structural design. The contribution of viscous dampers is considered in Pushover by iterating up to the numerical stability of effective damping ratio at the performance point. The method can be used to calculate the contribution of viscous dampers under frequent earthquakes, to analyze the design response spectrum and to evaluate the structural states, and to provide a set of effective methods for the design and optimization of complex structures. The damping ratio of the structure is calculated by using the method of free attenuation vibration, which is commonly used in the experiment, to calculate the damping ratio of the structure. The result is very close to the result of this paper. Six seismic waves are selected according to the current code, and the nonlinear dynamic history analysis under frequent earthquake is carried out according to the viscous damper scheme set by the method in this paper. The results show that the contribution of viscous damper is reasonably considered. It may directly affect the conclusion that the structure is qualified for lateral displacement.
【作者单位】： 北京工业大学城市与工程安全减灾省部共建教育部重点实验室;
【基金】：北京市自然科学基金资助项目(8141001)
【分类号】：TU352.1
，
本文编号：2294786
[Abstract]:The energy dissipation contribution of viscous damper is related to the velocity response. The traditional static nonlinear analysis method (Pushover) can not consider the contribution of viscous damper because it can not respond to the transient of the structure. It is suggested that the damper contribution be calculated by the displacement of the performance point and be equivalent to the structural damping for structural design. The contribution of viscous dampers is considered in Pushover by iterating up to the numerical stability of effective damping ratio at the performance point. The method can be used to calculate the contribution of viscous dampers under frequent earthquakes, to analyze the design response spectrum and to evaluate the structural states, and to provide a set of effective methods for the design and optimization of complex structures. The damping ratio of the structure is calculated by using the method of free attenuation vibration, which is commonly used in the experiment, to calculate the damping ratio of the structure. The result is very close to the result of this paper. Six seismic waves are selected according to the current code, and the nonlinear dynamic history analysis under frequent earthquake is carried out according to the viscous damper scheme set by the method in this paper. The results show that the contribution of viscous damper is reasonably considered. It may directly affect the conclusion that the structure is qualified for lateral displacement.
【作者单位】： 北京工业大学城市与工程安全减灾省部共建教育部重点实验室;
【基金】：北京市自然科学基金资助项目(8141001)
【分类号】：TU352.1
，
本文编号：2294786
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