摘要
采用振动传递理论分析了接缝刚度对振动跨缝传递特性的影响机制,并通过40万次缩尺度室内疲劳加载测试,验证了接缝边界损伤对振动传递特性的影响规律,据此建立了基于振动传递率的接缝损伤感知方法。依托6块水泥混凝土路面板接缝的振动传递率实测结果,并与弯沉比检测结果进行对比,检验振动传递率感知接缝损伤的实际效果。结果表明:接缝两侧振动传递率与接缝刚度显著相关(相关系数>0.8),在不同季节和不同接缝的重复性测试中振动传递率均能够灵敏、准确地感知接缝损伤(刚度损失比识别精度为±0.069),验证了该接缝损伤感知方法的可靠性。
The impact of joint stiffness on vibration transmissibility across concrete pavement joints was analyzed by theoretical analysis,and a vibration-based identification method for joint damage was proposed.Furthermore,laboratory tests were conducted using MTS to verify the influence of local stiffness-loss on vibration transmissibility,with 400,000 loading cycles being applied.In addition,six concrete pavement slabs were constructed to conduct a comparative analysis with the deflection-based method,to further validate the proposed vibration-based method in actual engineering environments.The results indicate that there is a significant correlation between frequency transmissibility and joint stiffness,with a correlation coefficient of over 0.8.The repeated tests conducted on different joints and in different seasons suggest that the stiffness-loss ratio of joints can be identified with an accuracy of±0.069,thereby confirming the accuracy and reliability of the proposed damage identification method.
作者
金辰
曾孟源
吴荻非
JIN Chen;ZENG Meng-yuan;WU Di-fei(Road and Bridge Design and Research Institute,Shanghai Urban Construction Design and Research Institute(Group)Co.,Ltd.,Shanghai 200125,China;Key Laboratory of Infrastructure Durability and Operation Safety in Airfield of CAAC,Tongji University,Shanghai 201804,China;Key Laboratory of Road and Traffic Engineering of Ministry of Education,Tongji University,Shanghai 201804,China;Department of Civil,Environmental and Geomatic Engineering,ETH Zurich,Zurich 8093,Switzerland)
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2023年第6期1736-1745,共10页
Journal of Jilin University:Engineering and Technology Edition
基金
国家自然科学基金项目(52008309)
交通运输部2020年交通运输行业重点科技项目(2020-ZD3-025)
民航飞行区设施耐久与运行安全重点实验室开放基金项目(MK202201).
关键词
道路与铁道工程
接缝
损伤感知
振动传递
水泥混凝土路面
road and railway engineering
joint
damage identification
vibration transmissibility
concrete pavement
