摘要
为研究钢桥面板疲劳裂纹特征的定量检测方法,对10个试件的疲劳裂纹进行超声波定量检测试验.考虑疲劳试件裂纹特征,改进己有人工裂纹特征的超声波检测方法,对比检测结果与实际疲劳断面,验证检测方法效果.试验结果表明:取裂纹开口回波代替裂纹尖端回波,采用1/3测长法检测疲劳裂纹长度具有更好的效果;裂纹长度检测值具有较高的精度,可认为检测值等于实际值;裂纹深度、角度检测值均与实际疲劳试件断面特征吻合较好,修正误差后可作为安全评定的参考.
In order to research the quantitative detecting method of fatigue crack features in orthotropic steel deck,fatigue cracks of10 specimens were quantitative detected by ultrasonic testing.Considering crack features of fatigue specimens,existing ultrasonic testing method to detect artificial cracks features was improved.Detection results were compared with real fatigue fracture surfaces.The effect of quantitative detecting method was verified.The test results show that replacing echo of crack tip with echo of crack opening makes 1/3 length measurement method better on fatigue crack length detection.Measured values of crack length have higher accuracy,and can be considered as real values.Measured values of crack depth and angle are both in good agreement with features of real fatigue specimen fracture surfaces,which can be used as reference for safety assessment after correcting error.
出处
《西安建筑科技大学学报（自然科学版）》
CSCD
北大核心
2016年第1期72-76,88,共6页
Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金
国家自然科学基金项目(51278166
51478163)
江苏省交通科学研究计划项目(2014Y02)
关键词
钢桥面板
疲劳裂纹特征
定量检测
超声检测
orthotropic steel deck
fatigue crack features
quantitative detection
ultrasonic testing
