往复荷载下带竖向阻尼器自复位墙滞回性能分析

针对一种新型带竖向阻尼器自复位墙（VD-SCW）的受力特征，该文建立可用于VD-SCW滞回性能的等效纤维模型，并利用利用Perform-3D有限元软件对等效纤维模型进行分析，通过与已有自复位墙试验数据的对比，验证纤维模型的有效性。在此基础上，分析了阻尼器屈服力、阻尼器刚度和预应力筋张力控制应力等关键参数对VD-SCW滞回性能的影响，结果表明:阻尼器屈服力的增加会提高墙体启动力和耗能能力，但同时会使墙体卸载时的残余变形增大；过小的阻尼器刚度会明显降低墙体耗能能力，但增加到一定程度后对墙体耗能影响不明显；预应力筋张力控制应力的增加会提高墙体的启动力，但会导致预应力筋过早屈服，从而降低墙体的摇摆能力，但对其耗能能力影响较小。

HYSTERETIC PERFORMANCE ANALYSIS OF SELF-CENTERING WALLS WITH VERTICAL DAMPERS UNDER CYCLIC LOADS

Perform-3D software is used to construct an equivalent fiber model for the hysteretic performance analysis of a new self-centering wall with vertical dampers (VD-SCW). Through the comparison between simulated and experimental results of a tested self-centering wall, the effectiveness of the constructed equivalent fiber model is verified. On the basis of the constructed model, the influence of key parameters on the hysteretic performance of VD-SCWs is analyzed. The results show that: with the increase of the yield strength in dampers, the activating force and energy dissipation capacity of VD-SCWs will be improved; also the energy dissipation capacity of VD-SCWs is minor with the low stiffness dampers. However, the stiffness of dampers do not have obvious influence on the energy dissipation of walls while they are increased to a certain value. The increase of tension force in tendons will increase the activating force of the walls and then decrease the rocking capacity due to the early yield of tendons, but its influence on energy dissipation of the wall is minor.