（1 南京工大建设工程技术有限公司， 南京 210000；  2 南京工业大学土木工程学院， 南京 211816）

［摘要］设计并加工了3个结构参数相同、但采用三种不同黏滞液的间隙式黏滞阻尼器，并对该3个黏滞阻尼器进行不同加载频率下的低周往复试验和抗疲劳性能试验。根据试验结果，分析了黏滞阻尼器的滞回性能，得到了相应的等效耗能系数、阻尼系数及阻尼指数。研究结果表明，间隙式黏滞阻尼器滞回曲线饱满，在小位移阶段便可有效耗能；阻尼系数随着黏滞液运动黏度增加而增大，阻尼指数随黏度增加而减小。该3个黏滞阻尼器历经30次往复循环加载，阻尼力均未出现衰减，具有较好的抗疲劳性能；Maxwell模型与该黏滞阻尼器的试验结果吻合良好。

［关键词］间隙式黏滞阻尼器； 黏度； 滞回曲线； 阻尼指数； Maxwell模型

中图分类号：TU352-1文献标识码：A文章编号：1002-848X(2019)21-0093-06

Experimental study on mechanical performance of clearance viscous dampers with different damping fluids

Miao Miao1, Xu Weizhi2, Wang Shuguang2, Du Dongsheng2

(1 Nanjing Gongda Construction Technology Co., Ltd., Nanjing 210000, China; 2 College of Civil Engineering, Nanjing Tech University, Nanjing 211816, China)

Abstract:Three clearance viscous dampers were designed and manufactured with same structural parameters and different damping fluids. The low-cycle reciprocating test and fatigue resistance test of these three types of viscous dampers under different loading frequencies were carried out. The hysteresis characteristics were analyzed and the equivalent energy dissipation coefficients, the damping coefficient and the damping exponent were derived and fitted according to the experiment results. The results show that the clearance viscous dampers get full hysteresis curves and can effectively dissipate energy at small displacement stage. With the increase of kinematic viscosity of the viscous fluid, the damping coefficient increases and the damping exponent decreases. The damping force doesn′t attenuate after 30 reciprocating cycles of loading, indicating that these three dampers get good fatigue resistance capacity. The experimental results are in good agreement with Maxwell model.

Keywords:clearance viscous damper; viscosity; hysteresis curve; damping exponent; Maxwell model

*国家自然科学基金（51678301，51678302，51808291）。

作者简介：苗苗，学士，助理工程师，Email:miaomiaojoe@sina.com。