作　　者： ; ; ; (李杨龙）;

机构地区： 北京工业大学建筑工程学院城市与重大工程安全减灾省部共建重点实验室

出　　处： 《建筑结构》 2016年第S1期384-390,共7页

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。 The energy dissipation of viscous damper is closely related to the response of velocity. Since the traditional pushover method cannot show the transient response of the structure,there are some difficulties in quantifying the contributions of viscous damp in structural analysis. Therefore,it suggests a new method to design structure considering structural damping which contains the damping of viscous damp,based on the displacement of the performance point.Then,this method takes the contributions of viscous damp into account by iterating the result of the performance point of pushover analysis until the value of structural equivalent damping ratio is stable. Moreover,structural design engineer can conveniently make use of this method to calculate the contributions of viscous damp under frequent seismic and rationally analyze the structure,according to both design response spectrum and structural performance,and it can be an effective method to design and optimize complex structure scheme. The consequence of structural damping through the free vibration of structure which is used to measure the damping ratio,utilizing numerical experimentation,is similar to the damping ratio calculated by paper' s method. And,the result of the nonlinear dynamic time history analysis of structure,whose scheme not merely selects 6 seismic waves of compliance with regulations but adopts this method under frequent seismic,indicates that the contributions of viscous damp may make a difference in demand of inter-story displacement.

关 键 词： 黏滞阻尼器 非线性分析 能量理论

领　　域： [建筑科学]