【摘要】 在不同环境温度、激励频率和应变幅值下,对筒式粘弹性阻尼器的动力性能指标进行了试验研究,研究表明筒式粘弹性阻尼器具有较为稳定的动力性能,耗能能力强。往复振动下阻尼器因内升温引起粘弹性材料软化,动力性能指标变化较大,设计中应考虑荷载循环次数的影响。通过试验研究了滞回圈数对筒式粘弹性阻尼器动态力学性能的影响,并据此提出了设计建议。介绍了筒式粘弹性阻尼器的老化性能试验和疲劳性能试验,试验结果表明具有良好的老化性能,在风振或地震下阻尼器具有较好的耐疲劳性能。最后介绍了筒式粘弹性阻尼器风振控制的工程应用实例,计算表明结构悬挑端竖向位移和加速度明显减小。更多还原

【Abstract】 The dynamic properties of the circular tube viscoelastic(VE) dampers were tested under different environment temperatures,excitation frequencies and shear strain amplitudes.The test results show that the circular tube VE dampers are of stable properties and excellent capacity for energy dissipation,which can be used in vibration control of engineering structure under earthquake or wind load.When VE dampers are applied to the wind-induced vibration control of buildings,the number of loading cycles must be taken into account in design to consider the effect of internal temperature increase of viscoelastic material.Based on the test results,the effect of the number of hysteretic loops on mechanical properties of circular tube VE damper was studied.The dynamic property tests of the aged circular tube VE dampers were also introduced,and the conclusion is drawn that the circular tube VE damper has good aging property.Meanwhile,the fatigue test of the circular tube VE dampers was performed to validate its good fatigue properties under earthquake action or wind load.The energy-dissipated design and main calculating result of an engineering structure were presented,which show that circular tube viscoelastic damper can significantly reduce the displacement and acceleration response of cantilevered structures.更多还原