摘要
为了改善矩形剪切钢板阻尼器在剪力作用下塑性分布不均且容易出现四周应力集中现象,提出了一种环形剪切开孔软钢阻尼器。利用ANSYS软件建立了该阻尼器的数值模型,并对其进行了力学分析。分析过程中分别考虑了钢板厚度、开孔数量和孔径大小等参数。研究结果表明:环形剪切开孔软钢阻尼器屈服位移较小,滞回曲线饱满且稳定,耗能能力强。阻尼器的初始刚度、最大恢复力及等效粘滞阻尼系数随着钢板厚度的增加而增大。开孔率不超过18%时,其初始刚度、最大恢复力及等效粘滞阻尼系数随着开孔数量和孔径大小的增加变化不大,说明阻尼器设计较为合理。最后,通过分析给出了该阻尼器的恢复力模型,并利用数值分析结果进行验证,显示其吻合度较高,能准确地描述该阻尼器的力学特性。
In order to improve the plastic distribution of the rectangular shear steel plate damper under the shear force and the surrounding stress concentration phenomenon,an annular shear perforated mild steel damper is proposed. The numerical model of the damper is established by ANSYS software and its mechanical analysis is carried out. Parameters such as steel plate thickness,number of holes and the size of the aperture are considered in the analysis. The results show that the yield displacement of the annular shear perforated mild steel damper is small,the hysteresis curve is full and stable,and the energy consumption is strong. The initial stiffness,maximum restoring force and equivalent viscous damping coefficient of the damper increase with the increase of the thickness of the steel plate. When the opening ratio is less than 18%,the initial stiffness,maximum restoring force and equivalent viscous damping coefficient change little with the increase of the number of holes and the size of the aperture,indicating that the damper design is more reasonable. Finally,the restoring force model of the damper is given by analysis,and the numerical analysis results are used to verify the restoring force model,it shows a high degree of fit and accurately describes the mechanical characteristics of the damper.
作者
王磊
杨明飞
陈宜网
沙志平
Wang Lei;Yang Ming-fei;Chen Yi-wang;Sha Zhi-ping(School of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan 232001,China;Anhui Shengwo Construction Engineering Co.Ltd,Hefei 230031,China)
出处
《工程抗震与加固改造》
北大核心
2021年第1期101-108,共8页
Earthquake Resistant Engineering and Retrofitting
基金
安徽省高校自然基金重点资助项目(KJ2016A209)
安徽理工大学人才引进基金项目(ZY044)。
关键词
环形剪切
软钢阻尼器
滞回曲线
开孔率
恢复力模型
annular shear
mild steel damper
hysteresis curve
opening ratio
restoring force model
