Ultrasonic Evaluation of Steel Bridge Girders over Long Ranges
Ultrasonic Evaluation of Steel Bridge Girders over Long Ranges
复制标题
钢桥大梁的远距离超声评估
DOI：
10.1201/9781003075844-6
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发表时间：
1996
影响因子：
1.7
通讯作者：
Carrica
中科院分区：
文献类型：
--
作者：
C. Woodward;K. White;A. Parashis;Carrica
本文介绍了利用超声兰姆波进行远距离检测钢梁疲劳裂纹和其他类型缺陷的初步研究。兰姆波能够长距离传播，使其成为检测桥梁大部分缺陷的理想选择，传感器放置在容易接近的位置。在这项研究中，实用的现场测试方法和程序，检测疲劳裂纹在实验室中进行测试的小钢构件和大W截面。然后，这些方法被用于一个钢梁桥的现场测试，以确定是否可以检测到疲劳裂纹在连接到腹板的区域在长距离。实验室测试结果表明，利用兰姆波可以在很远的距离上检测到裂纹。现场试验结果表明，兰姆波可用于检测梁腹板连接区域的疲劳裂纹。
This paper describes a preliminary study on the use of ultrasonic Lamb waves for detecting fatigue cracks and other types of defects in steel girders at long distances. Lamb waves are capable of propagating long distances, making them ideal for detecting defects in large portions of bridge girders with the transducer placed at an easily accessible location. In this study, practical field testing methods and procedures for detecting fatigue cracks were developed in the laboratory by testing small steel members and a large W section. These methods were then used in a field test of a steel girder bridge to determine if fatigue cracks could be detected in the area of a connection to the web at long ranges. Results from the laboratory tests indicate that cracks can be detected at long ranges using Lamb waves. Field test results indicated that Lamb waves can be used to detect fatigue cracks in the area of a connection to the girder web.