铁道标准设计2026，Vol.70Issue(1)：87-92,6.DOI:10.13238/j.issn.1004-2954.202402020004
斜拉索内置式高阻尼橡胶减振器性能研究
Research on Performance of Built-in High-Damping Rubber Shock Absorber for Stay Cable
摘要
Abstract
To mitigate wind-induced vibration of stay cables,a built-in shear-type high-damping rubber absorber was developed.The shock absorber featured a compact structure,eliminated the need for embedded plates,and had minimal impact on the overall bridge deck aesthetics.Small-strain model tests using high-damping rubber blocks under shear deformation were conducted to investigate the relationships of their mechanical parameters with strain,frequency,and fatigue recovery.A mechanical model of the stay-cable-high-damping rubber shock absorber system was established.Based on the model test results,vibration reduction analysis was conducted.The effectiveness of the shock absorber was validated through field testing on an actual bridge.The results showed that under shear strains below 30%,the shear modulus of the high-damping rubber was less than 3.0 MPa,and the loss factor consistently exceeded 0.35.After high-cycle,low-strain fatigue testing,the storage shear modulus and loss factor decreased by 26.1%and 0.8%,respectively.After an intermission,the mechanical parameters of the rubber blocks largely recovered to their pre-loading levels,and their critical loading cycle number exceeded 31000 cycles.As the stay cable length increased,the optimal shear area required for the shock absorber decreased progressively,and the optimal damping coefficient provided by the shock absorber increased correspondingly.Field testing on the actual bridge demonstrated that the shock absorber achieved a 97%reduction in vibration acceleration amplitude,and the root-mean-square acceleration was lower than the Level 1 exceedance threshold of 0.1019g specified in the cable monitoring standard.关键词
斜拉索/内置式减振器/高阻尼橡胶/剪切力学性能/储能模量/损耗因子/实桥测试/减振性能Key words
cable-stayed bridge/stay cable/built-in shock absorber/high-damping rubber/shear mechanical properties/storage modulus/loss factor/field testing/vibration reduction performance分类
交通工程引用本文复制引用
杨林,罗浩,刘鹏飞,赵海威..斜拉索内置式高阻尼橡胶减振器性能研究[J].铁道标准设计,2026,70(1):87-92,6.基金项目
中国中铁股份有限公司科技研究开发计划重大专项课题(2021-专项-04-01) （2021-专项-04-01）
