摘要
以3层设置黏滞阻尼墙的钢框架结构为研究对象,对其进行3条地震波在不同水准下的振动台试验。通过对设置与不设置黏滞阻尼墙的两种结构动力特性和动力响应对比,分析了黏滞阻尼墙的减震效果和耗能特征及其变化规律。研究结果表明,黏滞阻尼墙是一种同时提供附加刚度和附加阻尼的被动消能减震装置,其在提供附加阻尼和附加刚度的同时可以对结构位移起到非常显著的控制作用,并且随着输入地震波峰值加速度的增大,该附加刚度逐渐减小,而附加阻尼则逐渐增大。此外,有限元分析结果与振动台试验结果的吻合度随响应对象和激励工况的不同而变化,说明了传统Maxwell模型用于模拟黏滞阻尼墙在动态力学特性方面的局限性。
Investigated a shaking table test on a 3-story steel frame with and without viscous wall dampers（ VWDs）under three earthquake excitations of different earthquake levels. The vibration absorption effect and energy dissipation features of VWD were analyzed by the comparisons of dynamic characteristics and responses between the two structures. It is indicated that VWD is a passive energy dissipation damping device,which can provide additional stiffness and additional damping at the same time. The vibration absorption effect on displacements of structure model is remarkable under the contribution of additional damping and stiffness. Moreover,the additional stiffness decreases and the additional damping increases gradually by increase of magnitude of seismic wave excitations. In addition,the fitness between the finite element analysis and shaking table test varies with the response index and the excitation conditions,which illustrates the limitation of the traditional Maxwell model in simulating the dynamic mechanical characteristics of the VWD.
作者
周颖
张丹
卢文胜
ZHOU Ying ZHANG Dan LU Wensheng(State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 20009)
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2017年第3期14-25,共12页
Journal of Building Structures
基金
国家自然科学基金项目(51678449
51322803)
上海市曙光计划项目(14SG19)
关键词
钢框架
黏滞阻尼墙
振动台试验
减震效果
耗能特征
附加刚度
附加阻尼
steel frame
viscous wall damper
shaking table test
vibration absorption effect
energy dissipation feature
additional stiffness
additional damping
