摘要
为了提高结构在不同水平荷载作用下的使用舒适性和安全性,设计了双行程阻尼力可变剪切型摩擦阻尼器,在不同加载路径和摩擦面压力条件下,将4组1∶1比例试件进行拟动力加载试验.高低阻尼力的大小通过连接螺栓预紧力的大小设定.试验结果表明:阻尼器能够提供高低两种阻尼力,在小振幅阶段以低阻尼力工作,在大振幅阶段以高阻尼力工作.从低阻尼力向高阻尼力切换时,阻尼力的变化形式依赖于加载路径和运动副的间隙.铝板和钢板构成摩擦面的摩擦因数稳定.
A shear friction damper with two resistances and displacements was designed to improve the safety and comfort of a building under different horizontal loads. Pseudo-dynamic loading experiment was conducted on 4 full-scale damper assemblies with different loading procedures. The resistances of the dampers were set by adjusting the fastening forces of connecting bolts. The experimental results indicated that the damper provided adjustable low and high frictional resistances, respectively, in small and large displacements, and the transition speed between low and high frictional resistances depended on loading procedure and the clearances in kinematic pairs. The combination of steel and A1 alloy plates as a frictional pair showed a stable frictional coefficient.
出处
《西南交通大学学报》
EI
CSCD
北大核心
2011年第6期946-952,共7页
Journal of Southwest Jiaotong University
基金
中国博士后科学基金资助项目(20110491739)
中央高校基本科研业务费专项资金资助项目(SWJTU09ZT03
SWJTU09CX008)
日本学术振兴会资助项目(17360271)
关键词
可变阻尼力
摩擦阻尼器
滞回特性
行程
variable resistance
friction damper
hysteretic property
displacement
