【摘要】 对传统的Pall摩擦阻尼支撑体系进行改进,提出一种PFD-SMA支撑体系,充分利用Pall摩擦阻尼器(PFD)和形状记忆合金(SMA)的优点,使该体系具有强耗能能力和自复位功能;考虑几何非线性采用ANSYS程序对SMA棒材和PFD-SMA体系进行分析。研究结果表明:SMA棒材具有较强的耗能能力,且可恢复应变大;在钢框架结构中采用PFD-SMA体系能有效降低结构的地震响应,提高结构的抗震性能,同时,该体系可通过形状记忆超弹性及形状记忆效应具有双重自复位功能,表明PFD-SMA体系具有良好的抗震性能。更多还原

【Abstract】 The traditional Pall friction damping brace system was improved,and a PFD-SMA brace system was presented,which makes full use of Pall friction dampers(PFD) and shape memory alloy(SMA) so that the system has the energy dissipation ability and self-resetting function.The shape memory alloy bar and the PFD-SMA system were analyzed using ANSYS based on geometric nonlinearity.The results show that the capacity of the shape memory bar is strong,and its recovery deformation is much larger.The system can effectively reduce the seismic response of structure to improve the seismic performance of the high-rise steel frame,so the system has a dual self-resetting function based on the super elastic and shape memory effects of SMA,which indicates the PFD-SMA system has better seismic performance.更多还原