筒式粘弹性阻尼器的试验研究及工程应用
Experimental study and application of circular tube viscoelastic dampers for mitigating wind vibration response
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。本文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。本文还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。
The dynamic properties of the circular tube VE dampers are tested under different environment temperature, excitation frequencies and shear strain amplitudes. The test results show that the circular tube VE dampers have stable properties and excellent capacity for energy dissipation,which can be used in the vibration control of engineering structure under earthquake or wind loads. When VE dampers are applied to the wind-induced vibration control of buildings, the number of loading cycles must be taken into account in the design, for internal temperature increasing of viscoelastic material. Based on the test results, the effect of the number of hysteretic loops on the mechanical properties of the circular tube VE damper is studied. The dynamic property tests of the aged circular tube VE dampers are also introduced in this paper, 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 is performed. The test results indicate that the circular tube VE dampers have good fatigue properties under earthquake action or wind load. Combined with the engineering structure using circular tube viscoelastic dampers, the energy-dissipated design and main calculating result are illustrated. The calculated result shows that circular tube viscoelastic damper can significantly reduce the displacement response and acceleration of cantilevered structure.
筒式粘弹性阻尼器 / 动力性能试验 / 老化性能 / 疲劳性能 {{custom_keyword}} /
circular tube VE damper / dynamic properties test / aging property / fatigue property {{custom_keyword}} /
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