单U肋正交异性钢桥面板力磁关系研究  

Study on the stress-magnetization relationship of single U-rib orthotropic steel brige decks

作　　者：苏三庆[1] 梁嘉欣 王威[1] 廖文恺 左付亮 李俊廷 Su Sanqing;Liang Jiaxin;Wang Wei;Liao Wenkai;Zuo Fuliang;Li Junting(School of Civil Engineering,Xi′an University of Architecture and Technology,Xi′an 710055,China;School of Civil Engineering,Inner Mongolia University of Science and Technology,Baotou 014000,China)

机构地区：[1]西安建筑科技大学土木工程学院,西安710055 [2]内蒙古科技大学土木工程学院,包头014000

出　　处：《电子测量与仪器学报》2024年第12期181-189,共9页Journal of Electronic Measurement and Instrumentation

基　　金：国家自然科学基金项目(52378314,52278214);陕西省自然科学基础研究重点项目(2022JZ-21);西部装配式建筑产业化协同创新中心科研计划项目(N202203);秦创原创新驱动科研项目(YJZX20210008)资助。

摘　　要：金属磁记忆检测技术是一种新型的无损检测技术,能够识别铁磁材料的早期损伤。为推进该技术在桥梁钢领域损伤检测方面的应用,针对钢箱梁内部单U肋正交异性钢桥面板,进行了静力受弯试验,采集了U肋腹板在不同荷载等级下的磁信号数据,并结合ANSYS有限元软件获取其应力,建立了U肋腹板沿高度方向的力磁曲线及其应力集中区应力与磁信号、磁信号梯度的关系曲线,分析了力特征参数与磁特征参数之间的关系。研究结果发现:沿检测线方向,各检测线的法向、切向磁信号值均随荷载增大呈减小趋势,且在同一荷载等级下法向磁信号曲线较切向磁信号波动小,分布更平缓;U肋腹板的法向磁信号沿高度方向的变化曲线存在“波峰-波谷”现象,与其应力分布具有良好的对应关系,可通过该现象判断应力集中区域;将应力集中区域磁梯度K曲线的“陡升”现象作为实际工程中构件即将达到屈服强度的危险预警信号;力磁相关特征参量μσ-λk曲线具有良好的线性关系,根据该曲线可初步判断构件应力集中区的应力集中程度。Metal-magnetic memory detection technology is a new type of non-destructive testing technology,which can identify the early damage of ferromagnetic materials.In order to promote the application of this technology in the field of bridge steel damage detection,the static bending test was carried out for the single U-rib orthotropic steel bridge deck inside the steel box girder,the magnetic signal data of the U-rib web under different load levels were collected,and the stress was obtained by combining with ANSYS finite element software,and the force-magnetic curve of the U-rib web along the height direction and the relationship curve between the stress in the stress concentration area and the magnetic signal and magnetic signal gradient were established,and the relationship between the force characteristic parameters and the magnetic characteristic parameters was analyzed.The results show that along the direction of the detection line,the normal and tangential magnetic signal values of each detection line decrease with the increase of load,and the normal magnetic signal curve fluctuates less than that of the tangential magnetic signal under the same load level,and the distribution is more gentle.The normal magnetic signal of the U-rib web has a“peak-trough”phenomenon along the height direction,which has a good correspondence with the stress distribution,and the stress concentration area can be judged by this phenomenon.The“steep rise”phenomenon of the magnetic gradient K curve in the stress concentration area can be taken as the danger warning signal of the yield strength in the actual engineering component.Theμσ-λk curve of the force-magnetic correlation characteristic parameter has a good linear fit,and the stress concentration degree of the stress concentration area can be preliminarily judged according to the curve.

关 键 词：U肋 金属磁记忆检测 应力集中 磁信号 有限元法 

分 类 号：TN98[电子电信—信息与通信工程] TG115.28[金属学及工艺—物理冶金]