黏滞阻尼器在时程分析下的附加有效阻尼比研究  

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

作　　者：吴旭 周美容 陈曦 张雪梅 WU Xu;ZHOU Meirong;CHEN Xi;ZHANG Xuemei(Institute of Civil Engineering,Nantong Institute of Technology,Nantong 226000,China;Shanghai Unit Construction Engineering Consulting Co.,Ltd.,Shanghai 201908,China)

机构地区：[1]南通理工学院建筑工程学院,江苏南通226000 [2]上海优耐建筑工程咨询有限公司,上海201908

出　　处：《振动与冲击》2019年第4期258-262,257,共6页Journal of Vibration and Shock

基　　金：中青年优秀骨干教师培养项目;2015T创新条件建设计划项目(CP12015005)

摘　　要：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。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.

关 键 词：黏滞阻尼器 振型阻尼比 附加有效阻尼比 时程分析 阻尼能 

分 类 号：TH212[机械工程—机械制造及自动化] TH213.3