【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.更多还原

【Abstract】 <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.更多还原