摘要
为解决普通金属阻尼器在多遇地震下耗能效率低和摩擦阻尼器在罕遇地震下耗能能力不足等问题,提出一种分阶段耗能的摩擦-金属复合型阻尼器(FMCD)。为了考察金属阻尼器耗能材料(LY160和Q235)以及摩擦阻尼器的螺栓扭矩大小(80 N·m和120 N·m)等对FMCD受力性能的影响,制作了4个FMCD并对其进行拟静力循环荷载试验。试验结果表明,在止滑机制触发前,摩擦阻尼器工作,耗能效率高;加载位移大于止滑位移后,金属阻尼器工作,阻尼力增大;将摩擦阻尼器的预紧扭矩提升50%,FMCD摩擦阻尼器耗能阶段的峰值荷载和累积耗能分别提高了23%和18%;相较于采用Q235耗能的FMCD,采用LY160耗能的FMCD峰值荷载降低了7.6%,但累积耗能提高了29.9%,极限位移增加了15 mm。
To solve the problems of low energy dissipation efficiency of traditional metal dampers under frequently occurred earthquakes and insufficient energy dissipation capacity of friction dampers under rarely occurred earthquakes,a friction-metal coupled damper(FMCD)with staged energy dissipation was proposed.Considering the effects of the energy-dissipating materials of the metal damper(LY160 and Q235)and the bolt torque of the friction damper(80 N·m and 120 N·m)on the mechanical performance of the FMCD,four FMCDs were designed and subjected to quasi-static test.The results show that the FMCD exhibits frictional energy dissipation before the stop-slip mechanism is triggered,and the metal damper enters plastic energy dissipation after the loading displacement is larger than the stop-slip displacement.By increasing the preload torque of the friction damper part by 50%,the peak load and cumulative energy dissipation of the FMCD in the friction phase increase by 23%and 18%,respectively.Compared with the FMCD with Q235 energy dissipation,the peak load of the FMCD with LY160 energy dissipation decreases by 7.6%,but the cumulative energy dissipation increases by an average of 29.9%and the ultimate displacement increases by 15 mm.
作者
蔡亦杰
许伟志
任俊奕
王曙光
杜东升
解琳琳
CAI Yijie;XU Weizhi;REN Junyi;WANG Shuguang;DU Dongsheng;XIE Linlin(College of Civil Engineering,Nanjing Tech University,Nanjing 211816,China;Scientific Research Fund of Multi-Functional Shaking Tables Laboratory,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2023年第S02期231-239,共9页
Journal of Building Structures
基金
国家自然科学基金项目(52208173)
北京建筑大学大型多功能振动台阵实验室开放研究专项基金(2022MFSTL03)。
关键词
分阶段耗能
复合型阻尼器
拟静力试验
耗能能力
滞回性能
staged energy dissipation
coupled damper
quasi-static test
energy dissipation capacity
hysteresis performance
作者简介
蔡亦杰,出生于1999年,男,工学硕士,主要从事结构工程抗震及振动控制方面的研究。email:202161226223@njtech.edu.cn;通信作者:许伟志,出生于1990年,男,工学博士,博士后,主要从事结构工程抗震及振动控制方面的研究。email:xuwz@njtech.edu.cn
