中文摘要：

波形钢腹板T型焊缝缺陷将对大跨度钢结构桥梁的安全运行产生巨大隐患,但目前仍然没有一种有效可靠的无损检测方法对其进行质量检测。根据具有一定曲率且阻碍探头移动的波形钢腹板T型焊缝结构特点,提出超声相控阵检测技术。首先通过对相控阵检测理论进行分析,并与常规超声检测方法比较,该检测技术可通过图像直观显示检测结果,并可获得更高的检测灵敏度和检测效率;然后根据实际波形钢腹板结构设计和制备了含不同类型缺陷的试样;最后采用相控阵检测技术对试样进行检测。检测结果显示与试样缺陷参数比较吻合,进一步验证了该方法的有效性和可靠性。

英文摘要：

The T type weld defects of corrugated steel webs will produce huge hidden danger to the safe operation of large span steel structures,but there is still no effective and reliable method to detect the quality of the weld at present.The ultrasonic phased array detection technology is proposed here according to the T type welded structure characteristics that corrugated steel webs will have certain curvature and hinder movement of the probe,. The firstly phased array detection theory is analyzed and compared with the conventional ultrasonic testing method,and the detection technology can display the detection results by images,hence the higher sensitivity and detection efficiency can be obtained. Then the specimens with different types of defects are designed and prepared according to the actual structure of corrugated steel web,the phased array detection technology is used to detect these specimens. Detection results coincide with the specimens design parameters,hence can further verify the effectiveness of the method for checking the quality and reliability of the structure.