【摘要】 对传统的Pall摩擦阻尼支撑体系进行了改进,充分利用Pall摩擦阻尼器和形状记忆合金的优点提出了一种Pall摩擦阻尼器和形状记忆合金(Pall-typed frictional damper-shape memory alloy,PFD-SMA)支撑体系.考虑几何非线性,采用ANSYS程序,根据摩擦力和SMA的刚度、支撑长度、最大恢复应变及弹性模量等,分析了PFD-SMA支撑体系的滞回性能.分析结果表明该体系具有较好的耗能能力,即使在抱死的情况下SMA支撑本身也会耗能;摩擦力与SMA刚度、长度以及弹性模量对其滞回性能都有影响.同时,该体系可因为SMA的超弹性、形状记忆效应而具有双重自复位功能.更多还原

【Abstract】 A traditional Pall friction damping brace system is improved by a Pall-typed frictional damper-shape memory alloy(PFD-SMA) brace system,which makes full use of PFD and the advantages of SMA.The system has the energy dissipation ability and self-resetting function.The influences of SMA’s stiffness,slip force of the Pall-typed damper,maximum recovery strain,elasticity modulus,and length of SMA brace are analyzed.Results show that the PFD-SMA frictional brace system has the same energy dissipation with an origin Pall brace system,even in the case of hugging SMA brace can consume energy by itself.The system has a dual self-resetting function by SMA’s super-elastic performance and shape memory effect.更多还原