摘要
为及时有效地检测钢结构桥梁高强螺栓的疲劳损伤,以钢桥普遍使用的10.9S级M30高强螺栓为研究对象,采用相控阵超声对高强螺栓人工刻槽模拟疲劳裂纹进行了检测,对比分析了检测端面、损伤程度和损伤位置对疲劳裂纹损伤识别的影响。试验结果表明,以螺栓尾端作为检测面能有效减少疲劳损伤的漏检和误检,检测精度高于螺帽端作为检测面的情况;相控阵超声对大于1 mm的人工刻槽裂纹缺陷具有良好的检测精度,能够识别出螺栓夹持长度内不同位置的损伤,且损伤定位相对误差在7%以内。
In order to detect the fatigue damage of high-strength bolt in steel bridge in time and accurately, the fatigue crack simulated by manual grooving damage in 10.9 S grade M30 high-strength bolt commonly used in steel bridge were detected by phased array ultrasonic technique. The effect of end face under detection, damage degree and damage location on fatigue crack damage identification were studied. The test results showed that using screw thread end as detection face could effectively reduce the undetected rate and miscalculation, and the detection accuracy is better than that of another end. The phased array ultrasonic has a good detection accuracy for the manual grooving damage greater than 1 mm in bolt holding length, and could identify the damage location with the relative positioning error within 7%.
作者
王贤强
郭永保
马志华
杨羿
刘朵
张建东
WANG Xianqiang;GUO Yongbao;MA Zhihua;YANG Yi;LIU Duo;ZHANG Jiandong(The State Key Laboratory on Safety and Health of In-service Long-span Bridges,JSTI Group Co.,Ltd.,Nanjing 211112,China;School of Civil Engineering,Southeast University,Nanjing 211189,China;School of Civil and Transportation Engineering,Hohai University,Nanjing 210024,China;Nantong Highway Development Center,Nantong 226001,China)
出处
《无损检测》
CAS
2022年第10期52-56,共5页
Nondestructive Testing
基金
中国博士后科学基金项目(2018m642300)
江苏省博士后科研资助计划项目(2018K136C)
江苏省交通运输科技项目(2018Y11,2019Y69-02)
南通市公路科技项目(GHJJSYJ2020001)。
关键词
高强螺栓
相控阵超声
疲劳裂纹
损伤识别
定量评价
high-strength bolt
phased array ultrasonic
fatigue crack
damage identification
quantitative evaluation
