摘要
速度非线性黏滞型阻尼器被广泛应用于建筑结构减震设计,较多采用钢支撑与主体结构连接。对于支撑刚度的要求在规范中缺少相关规定,相关研究较少,有待于进一步的研究和工程实例扩充。本文以高烈度区某框架-剪力墙结构为工程实例,利用ETABS软件建立有限元模型,采用弹塑性时程分析方法对结构进行减震效果分析。结果表明,支撑刚度K_(b)对速度非线性黏滞型阻尼器的减震效果β影响较大,支撑刚度越大,减震效果越强并趋于最优值;在影响减震效果的主要参数中,阻尼器刚度Kc对减震效果的影响较小;当支撑刚度设定为与阻尼系数C线性增长时,减震效果可有效提高。当K_(b)=3000C时,在各阻尼系数及阻尼器自身刚度下,减震效果β≥90%,减震效果较为理想。
Nonlinear viscous dampers are widely used in the damping design of building structures,and the steel brace are mostly used to connect the dampers with the main structure.The requirements for bracing stiff-ness are lack of regulations in the code,and related research is still few,further research and more project ex-amples are needed.Taking a frame-shear wall structure in high intensity area as an engineering example,the ETABS software was used to establish finite element analysis models,to perform elastic-plastic time-history anal-ysis for the damping structure.The results show that the bracing stiffness K_(b) has a great influence on the damp-ing effectβof nonlinear viscous damper.A higher support stiffness leads to stronger seismic mitigation effects,approaching an optimal value.Among the key parameters affecting the damping effect,the damper stiffness Kc has a relatively minor impact on the damping performance.When the support stiffness is set to increase linearly with the damping coefficient C,the damping effect can be effectively improved.When K_(b)=3000C,for various damping coefficients and damper stiffness values,the damping effectβ≥90%,indicating a relatively ideal damping performance.
作者
董羽
孙峣
Dong Yu;Sun Yao(Tianjin University Architectural Design&Urban Planning Research Institute Co.,Ltd.,300073,China)
出处
《特种结构》
2025年第6期118-122,共5页
Special Structures
关键词
速度非线性黏滞型阻尼器
支撑刚度
消能减震
时程分析
Nonlinear viscous dampers
Bracing stiffness
Energy dissipation
Time history analysis
