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Ultrasonic Testing of Discontinuities in Closed-Rib Bridge Decks

机译：闭式肋桥甲板中不连续性的超声波测试

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摘要

Many of the world's long span bridges have transitioned to a lightweight deck design consisting of orthotropic box sections. Common designs include U-shaped closed-ribs to stiffen the deck and often other skins of the orthotropic section. Many of the designs call for a partial joint penetration weld to attach the closed-ribs to the skin. Although the qualification process to weld these types of structures is comprehensive, discontinuities are sometimes found during production, which require repair and/or a change in the process and requalification of the weld procedure. As each project may use different geometric and welding configurations, procedures specific to the weld and discontinuity must be developed in order to consistently identify and accurately locate the discontinuities. The following are some discontinuities observed on various bridge projects and the methods that were successful in identifying and locating the discontinuity.
机译：许多世界的长跨度桥梁过渡到由正向箱体部分组成的轻质甲板设计。常见的设计包括U形闭合肋，以使甲板混溶和通常的正向剖面的其他皮肤。许多设计要求部分关节穿透焊缝将闭合肋附接到皮肤。虽然焊接这些类型的结构的资格过程是全面的，但在生产过程中有时会发现不连续性，这需要修复和/或焊接程序的过程和需求的变化。由于每个项目可以使用不同的几何和焊接配置，因此必须开发特定于焊接和不连续性的程序，以便始终如一地识别和准确地定位不连续性。以下是各种桥梁项目中观察到的一些不连续性以及成功识别和定位不连续性的方法。

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