建筑结构学报2025，Vol.46Issue(12)：138-150,13.DOI:10.14006/j.jzjgxb.2025.0043
变摩擦阻尼器的试验研究和数值模拟
Experimental investigation and numerical simulation of variable friction damper
摘要
Abstract
Traditional Constant friction dampers(CFD)exhibit constant friction force and insufficient stiffness and are inadequate for seismic mitigation under multi-level earthquakes.To overcome the limitations of CFD,a variable friction damper(VFD)was proposed.The proposed VFD adopts an arc-shaped friction interface and utilizes a compressed rubber pad to achieve a continuous variation in friction force.Experimental results show that increasing the bolt pretightening force by 8 kN increases the peak load of the VFD by 33.30％and its energy dissipation capacity by 104.05％,while simultaneously intensifying the internal force loss in the bolts and reducing the energy dissipation stability.Conversely,increasing the thickness of the rubber pad effectively reduces the bolt force loss and improves energy dissipation stability,while it slightly weakens the peak load and energy dissipation capacity.Based on the experimental results,a finite element(FE)model of the VFD was developed using ABAQUS to further investigate the influence of the arc-surface width and height of the main plate and the hardness of the rubber pad on the performance of the VFD.The results indicate that increasing these parameters enhances both the peak load and energy dissipation capacity,with the arc-surface width exhibiting the most significant effect;when the width increases from 30 mm to 50 mm,the residual displacement of the VFD decreases by 25.33％.In addition,a simplified FE model of the VFD was constructed in OpenSees,and a comparative analysis between the VFD and CFD was conducted within a single-degree-of-freedom(SDOF)system.The results demonstrate that the VFD provides superior displacement control performance compared with the CFD.关键词
变摩擦阻尼器/单自由度系统/滞回曲线/数值模拟/地震响应Key words
variable friction damper/SDOF system/hysteretic behavior/numerical simulation/seismic response分类
建筑与水利引用本文复制引用
李俊龙,刘烨..变摩擦阻尼器的试验研究和数值模拟[J].建筑结构学报,2025,46(12):138-150,13.基金项目
国家自然科学基金项目(52208496). （52208496）
