摘要
对橡胶支座存在的问题进行了分析,介绍了SMA-橡胶复合支座的基本构造和工作原理,建立了设置不同支座的单自由度结构的运动方程。应用大型有限元软件ANSYS对分别设置固定支座、普通叠层橡胶支座和形状记忆合金(SMA)-橡胶复合支座这3种不同支承条件的结构进行了单向地震作用下的隔震仿真模拟,及节点位移和加速度的时程分析。分析表明,SMA-橡胶复合支座和普通叠层橡胶支座都能有效地减小结构的位移和加速度反应,而SMA-橡胶复合支座比普通叠层橡胶支座能更有效地减小结构的绝对位移反应,防止因隔震层位移过大而导致支座失稳。
In this thesis the defects of rubber bearings are concluded, and then the superelastic hysteresis of shape memory alloy （SMA） and a method of improving the work frequency of SMA wire actuators is used to design a new type of bearing to reduce vibration which is named SMA-rubber composite bearing. The motion equation of single degree of freedom structure with different bearings is established. Test models of structures with three different bearing which includes non-seismic isolation bearings, rubber bearings, and SMA-rubber composite bearings have been simulated and analyzed. The results show that compared with rubber bearings, structures with SMA-rubber composite bearings are more efficient under seismic forces which can reduce both distortion and internal force of the structure.
出处
《自然灾害学报》
CSCD
北大核心
2006年第3期123-127,共5页
Journal of Natural Disasters
基金
国家自然科学基金资助项目(50178047)
辽宁省教育厅科研基金资助项目(2004D245)
关键词
形状记忆合金
橡胶支座
隔震
shape memory alloy
rubber bearing
seismic isolation
