Abstract A steel tubular friction damper (STFD) is proposed for vibration reduction in large-span spatial structures. The effects of the amplitude of the applied displacement, the pre-tightening force of the high-strength bolts, and the material of the friction plates on the hysteretic behaviour of the STFD are analysed experimentally. The single-cycle energy consumption increases and the equivalent stiffness decreases with increasing displacement amplitude. In addition, the single-cycle energy consumption and equivalent stiffness of the STFD increase with increasing pre-tightening force. Both the single-cycle energy consumption and the equivalent stiffness of the STFD with aluminium alloy or brass friction plates are larger than that of the STFD with steel friction plates. Then, a mechanical model of the STFD is established for further numerical analysis. Several structural members in a 40-m-span double-layer reticulated shell are replaced with STFDs to provide vibration reduction. Optimal arrangement of STFDs is studied based on additional modal damping ratio. The effects of the replacement rate, earthquake intensity and various ground motions on the vibration reduction effect are investigated via numerical analyses. The reduction ratio first increases and then decreases with increasing replacement rate, and the best performance is observed at a replacement rate of 10%. The vibration reduction effect of the STFDs is more obvious for strong ground motions than for weak ground motions. Under various ground motions, the vibration reduction effect of the STFDs is better for the two ordinary ground motions than for the four long-period ground motions selected herein.

中文翻译：

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双层网壳钢管摩擦阻尼器及减振效果

摘要 提出了一种钢管摩擦阻尼器（STFD）用于大跨度空间结构的减振。通过实验分析了施加位移的幅度、高强度螺栓的预紧力和摩擦片的材料对 STFD 滞后行为的影响。随着位移幅值的增加，单循环能耗增加，等效刚度减小。此外，STFD 的单循环能耗和等效刚度随着预紧力的增加而增加。采用铝合金或黄铜摩擦片的STFD单循环能耗和等效刚度均大于采用钢摩擦片的STFD。然后，建立 STFD 的力学模型以进行进一步的数值分析。40 米跨度的双层网状壳中的几个结构构件被 STFD 取代，以减少振动。基于附加模态阻尼比研究 STFD 的优化布置。通过数值分析研究了置换率、地震烈度和各种地面运动对减振效果的影响。减速比随着置换率的增加先增加后降低，在10%的置换率下表现最佳。STFDs的减振效果对于强地震动比弱地震动更明显。在各种地面运动下，