黏滞阻尼器在时程分析下的附加有效阻尼比研究

为了研究消能减震结构中黏滞阻尼器在时程分析中所提供的附加有效阻尼比,从阻尼力做功(阻尼能)的角度出发,建立阻尼能与附加有效阻尼比在时程过程中的关系,提出附加有效阻尼比的理论计算公式,并建立有限元分析模型来验证该公式,对比消能减震结构与等效结构的阻尼能。结果表明,该阻尼比计算公式比现有的其它公式具有更强的通用性及合理性,适用于计算黏滞阻尼器在任意时程分析过程中的附加有效阻尼比,且消能减震结构与等效结构具有相同的阻尼能。

A study on additional effective damping ratio of viscous dampers from time-uistory analysis

To investigate additional effective damping ratio contributed by viscous dampers in structures during time-history analysis,by focusing on the work done by damping forces(damping energy),the paper established a relation between damping energy and equivalent damping ratio in time-history analysis,put forward theoretical formula of additional effective damping ratio,created finite element analysis models to testify the formula,and compared damping energies of the energy dissipation structure and an equivalent structure.The results show that the formula of equivalent damping ratio is more versatile and reasonable than other current formulae.It is applicable for calculating additional effective damping ratio of a energy dissipation structure in any time-history load case,and make energy dissipation structure and equivalent structure to have equal damping energy.