摘要
消能结构的传统设计使用反复试算法设计附加阻尼器,这费时费力。在基于性能的抗震设计框架内,提出了粘滞阻尼器基于改进能力谱法的直观设计法。满足一种给定性能准则的总粘滞阻尼比,可由有效阻尼比的总需求减去总固有阻尼比与结构构件滞回变形的等效阻尼比之和算得。结合我国的设计反应谱和10条地震动平均反应谱,给出了简化设计方法的具体步骤。时程分析结果表明,按该法设计的附加粘滞阻尼器结构的最大位移与给定的目标位移吻合较好。
A simplified yet effective design procedure for viscous dampers was presented based on improved capacity spectrum method using the concept of performance based seismic design. The amount of added viscous damping ratio required to meet a given performance objective was evaluated from the difference between the total demand for effective damping ratio and the inherent damping ratio plus equivalent damping ratio resulting from hysteretic system deformation. Application of the method is illustrated with two examples, using Chinese design response spectrum and mean response spectrum. Nonlinear dynamic analysis results indicate that the maximum displacements of structures installed with supplemental dampers designed in accordance with the proposed method agree well with the given target displacements. The advantage of the presented procedure over the conventional iterative design method is also highlighted.
出处
《工程力学》
EI
CSCD
北大核心
2007年第6期147-152,共6页
Engineering Mechanics
基金
陕西省教育厅专项科研计划项目(05JK236)
关键词
粘滞阻尼器
等效阻尼
改进能力谱法
非线性动力分析
基于性能的抗震设计
viscous dampers
equivalent damping ratio
improved capacity spectrum method
nonlinear dynamic analysis
performance based seismic design
