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材料导报  2024, Vol. 38 Issue (4): 22070065-8    https://doi.org/10.11896/cldb.22070065
  金属与金属基复合材料 |
基于金属磁记忆的弯曲工字钢梁的力-磁效应
苏三庆1,2,*, 邓瑞泽1,2, 王威1,2, 易术春3, 左付亮1,2, 刘馨为1,2, 李俊廷1,2
1 西安建筑科技大学土木工程学院,西安 710055
2 西安建筑科技大学结构工程与抗震教育部重点实验室,西安 710055
3 陕西省建筑科学研究院有限公司,西安 710082
Force-Magnetic Effect of Bending Steel I-beam Based on Metal Magnetic Memory
SU Sanqing1,2,*, DENG Ruize1,2, WANG Wei1,2, YI Shuchun3, ZUO Fuliang1,2, LIU Xinwei1,2, LI Junting1,2
1 School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China
2 Key Laboratory of Structural Engineering and Earthquake Resistance, Ministry of Education, Xi’an University of Architecture and Technology, Xi’an 710055, China
3 Shaanxi Architecture Science Research Institute Co., Ltd., Xi’an 710082, China
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摘要 目前,基于金属磁记忆检测技术的受力状态表征及损伤评估应用广泛,但在受弯构件的检测中,弯曲长度及荷载作用位置对检测结果的影响尚不明确。为研究受弯构件的力-磁效应,本工作基于四点弯曲工字钢梁的磁记忆检测,采用考虑初始平面外弯曲和应力与磁化作用角度的力-磁耦合方法,通过COMSOL多物理场仿真软件进行了数值模拟研究,并结合有效场理论分析了钢梁弯曲长度对磁信号的影响,提出了表征损伤及荷载作用位置的磁特征参数。结果表明:检测线磁信号峰-峰值S在钢梁接近屈服状态时显著增大,并在钢梁处于承载能力极限状态时达到最大值;腹板检测线磁信号峰-峰值Sw在钢梁屈服和达到最大承载能力时分别随有效段长度的增加呈线性减小和以二次函数的规律减小,而下翼缘检测线磁信号峰-峰值Sf在钢梁屈服和达到最大承载能力时均随有效段长度的增加以二次函数的规律减小;根据磁特征参数Sw和Sf定义了磁损伤指数D和荷载作用系数Sr,当钢梁所受外加荷载超过其最大承载能力的80%时,可根据D＞0.5的特征对钢梁不安全的受力状态进行预警;荷载作用系数Sr与钢梁的剪跨比λ近似线性相关,可以表征荷载的作用位置。
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苏三庆
邓瑞泽
王威
易术春
左付亮
刘馨为
李俊廷
关键词:  工字钢梁  金属磁记忆  有限元分析  损伤表征  力-磁耦合    
Abstract: At present, the characterization of stress states and the assessment of damage based on the metal magnetic memory inspection method is widely applied, but the influence of the specimen size and the loading position on the inspection of flexural members is still unclear. In order to study the force-magnetic effect of flexural members, the numerical simulation was carried out by COMSOL multiphysics software, based on the magnetic memory inspection of the four-point bending steel I-beam. It was taken into consideration the initial defect and the angle between applied stress with magnetization. The influence of the effective length of the specimen on the magnetic signal was analyzed, combined with the effective field theory. It was proposed the magnetic characteristic parameters represent the damage and the loading position. The results show that the peak-to-peak value S of the magnetic signal increases significantly when the steel beam approaches the yielding state, and reaches the maximum when the steel beam reaches the maximum bearing capacity. When the beam yields and reaches the maximum bearing capacity, the peak-to-peak value Sw of the inspection line on the web decreases linearly and quadratically with the increase of the effective length, respectively. The peak-to-peak value Sf of the inspection line on the bottom flange decreases quadratically with the increase of the effective length of the beam when it yields or reaches the maximum bearing capacity. According to the magnetic characteristic parameters, It is defined the magnetic damage index D and the loading factor Sr. When the applied load on the steel beam exceeds 80% of its maximum bearing capacity, the unsafe stress state of the steel beam can be warned according to the D greater than 0.5. The loading factor Sr is approximately linearly related to the shear-span ratio λ of the steel beam, which can characterize the loading position.
Key words:  steel I-beam    metal magnetic memory    finite element analysis    damage characterization    force-magnetic coupling
出版日期:  2024-02-25      发布日期:  2024-03-01
ZTFLH:  TG115.28  
基金资助: 国家自然科学基金(52378314;52278214);陕西省自然科学基础研究计划重点项目(2022JZ-21);中铁第一勘察设计院集团有限公司科研开发项目(院科20-58)
通讯作者:  *苏三庆,西安建筑科技大学教授、博士研究生导师,长期从事钢筋混凝土结构、工程结构抗震及其防灾减灾、结构安全诊断与加固等方面的科研与教学工作。主持或参与国家基金项目5项、省部级项目10余项;获省部级科技奖6项、国家授权专利50余项,出版著作8部,发表学术论文100余篇,其中30余篇被SCI、EI收录。sussqx@xauat.edu.cn   
引用本文:    
苏三庆, 邓瑞泽, 王威, 易术春, 左付亮, 刘馨为, 李俊廷. 基于金属磁记忆的弯曲工字钢梁的力-磁效应[J]. 材料导报, 2024, 38(4): 22070065-8.
SU Sanqing, DENG Ruize, WANG Wei, YI Shuchun, ZUO Fuliang, LIU Xinwei, LI Junting. Force-Magnetic Effect of Bending Steel I-beam Based on Metal Magnetic Memory. Materials Reports, 2024, 38(4): 22070065-8.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.22070065  或          http://www.mater-rep.com/CN/Y2024/V38/I4/22070065
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