SMA-MR阻尼器在大跨度挑篷结构中的减振控制研究  

Vibration control in long-span canopy roof structures using composite SMA-MR damper

作　　者：薛素铎[1] 卞晓芳[1] 

机构地区：[1]北京工业大学建筑工程学院,北京100022

出　　处：《空间结构》2005年第2期19-26,共8页Spatial Structures

基　　金：国家自然科学基金资助项目(50178006);北京市自然科学基金资助项目(8042008).

摘　　要：将作者提出的SMA-MR复合型阻尼器应用到大跨度挑篷结构的减振控制中,建立了挑篷结构的理论模型,编制了减振控制分析程序.通过输入三向El-Centro地震波,分别研究了阻尼器在地震加速度峰值为0.2g、0.4g和1.0g情况下的减振性能.结果表明,阻尼器对挑篷结构的节点位移和杆件轴力都有很好的控制效果.然后系统进行了SMA-MR复合型阻尼器在挑篷结构中的减振控制参数研究,通过对比分析,给出了实用性的工程建议.<Abstrcat> The designed SMA-MR damper is applied to long-span canopy roof structures to investigate its vibration control performance. Theoretical model of the system is set up and a computer program for vibration control is developed. Then, the control performance is analyzed with inputting three-dimensional El-Centro earthquake waves in different seismic intensity. It is shown that SMA-MR damper is very effective to mitigate earthquake responses of long span roofs. Then parametric studies for control performance of the SMA-MR damper in long-span canopy roof structures is carried out. By analysis, practical engineering suggestions are presented.

关 键 词：挑篷结构 大跨度 MR阻尼器 控制研究 减振控制 加速度峰值 理论模型 分析程序 减振性能 参数研究 控制效果 节点位移 对比分析 工程建议 复合型 地震波 实用性 轴力 

分 类 号：TU398.03[建筑科学—结构工程] TU758.11