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摩擦-碟簧三维复合隔震支座的性能试验研究 总被引：2，自引：0，他引：2
对适用于大跨结构的摩擦-碟簧三维复合隔震支座进行了振动台试验研究,该支座在水平向和竖向分别采用摩擦滑移装置和碟型弹簧隔震。在水平向,试验重点测试了简谐激励和地震动激励下支座的滞回性能,考察了竖向荷载变化及地震动强度对隔震性能的影响,以期为建立水平隔震理论模型提供依据;在竖向,对碟型弹簧的等效阻尼比和等效刚度进行了测试,研究了竖向预压荷载和动力荷载对竖向滞回性能的影响。结果表明,复合隔震支座在水平向和竖向均具有较好的滞回性能,竖向等效阻尼比在0.10～0.15间,且随着预压荷载的增加而增大。 相似文献
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依据自回归(AR)法,确立了考虑风速时程空间相关性的模拟方法,并利用Matlab语言编制了相应的程序。基于上述方法,模拟了某体育场挑篷结构的风速时程,并对所得风速时程离散值进行数理统计分析,结果表明模拟谱与目标谱吻合较好。根据结构风振响应分析的需要,将模拟风速转变为风荷载对结构进行时程分析,获得了结构风振响应,为结构抗风设计提供依据。计算表明,基于风速时程的结构风振响应分析方法可有效分析体育场挑篷的风振响应。 相似文献
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Control devices incorporated with shape memory alloy 总被引：1，自引：1，他引：1
Shape Memory Alloy (SMA) is a type of material that offers some unique characteristics for use in devices for vibration control applications. Based on SMA's material properties, four types of control devices that incorporate NiTi SMA wires are introduced in this paper, which include three types of dampers (SMA damper, SMA-MR damper and SMA-friction damper) and one kind of isolation bearing (SMA-rubber bearing). Mechanical models of these devices and their experimental verifications are presented. To investigate the control performance of these devices, the SMA-MR damper and SMA-rubber bearing are applied to structures. The results show that the control devices could be effective in reducing the seismic response of structures. 相似文献
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