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该文首先对PFD-SMA支撑体系的滞回性能进行试验研究,分别研究形状记忆合金长度、Pall型摩擦阻尼器的摩擦力(即滑动螺栓预紧力)对其耗能能力的影响,试验结果表明该体系具有较好的耗能能力,支撑长度、摩擦力对其性能有影响:形状记忆合金支撑长度越短、摩擦力越大,越容易发挥形状记忆合金的超弹性性能。然后将其应用于导管架式海洋平台隔震结构,利用有限元分析软件ANSYS分析平台在地震波下的减震效果,结果表明这种体系具有良好滞回性能,能够消耗较多的能量,能满足安全和稳定性的要求。
In this paper, the hysteretic behavior of the PFD-SMA bracing system is firstly studied. The effects of the shape memory alloy length, the friction force of the Pall-type friction damper (ie, the sliding bolt pretightening force) on the energy dissipation capacity are studied respectively. The results show that the system has good energy-dissipating ability. The length of the support and the frictional force have an impact on the performance. The shorter the length of the shape memory alloy, the larger the friction is, the easier it will be for the superelasticity of the shape memory alloy. Then it is applied to the isolation structure of jacket platform marine platform. The seismic effect of the platform under seismic wave is analyzed by finite element analysis software ANSYS. The results show that this system has good hysteretic performance, can consume more energy and can satisfy Safety and stability requirements.