Ultrasonic phased array detection method of steel box beam U-rib angle welding seam

Abstract

The invention relates to an ultrasonic phased array detection method of a steel box beam U-rib angle welding seam. A detection device of the method comprises an ultrasonic phased array detection instrument (1), a phased array probe (2), a CSK-IA test block (3), a reference block (4), a U-rib web plate (5), a panel (6) and an angle welding seam (7). The ultrasonic phased array detection method of the steel box beam U-rib angle welding seam provided by the invention comprises the following steps of: regulating the sensitivity of the equipment by utilizing the reference block, recording the horizon distance from the front end of the phased array probe to a groove, then, scratching a detection line on the U-rib web plate, and finally detecting the fusion depth and internal defect of the welding seam by adopting the phased array probe. The method provided by the invention solves the problem of detecting the fusion depth and internal defect of the steel box beam U-rib angle welding seam, and the welding quality of the steel box beam U-rib angle welding seam is effectively controlled.

Description

technical field [0001] The invention relates to an ultrasonic phased array detection method for U-rib fillet welds of steel box girders, and belongs to the technical field of non-destructive testing. Background technique [0002] With the continuous development of bridge construction in our country, orthotropic bridge decks are being used more and more due to their unique advantages. In the study of orthotropic decks, attention should be paid to local stresses, out-of-plane deformations, and stresses due to torsion. The fatigue problem of bridge deck welds is mainly manifested in the U rib welds. At present, the non-destructive testing of steel box girder bridge deck U-ribs at home and abroad mainly uses magnetic particle testing. Magnetic particle testing is a detection method for surface and near-surface defects, and cannot identify internal defects. However, the technical specification for the production of U-rib fillet welds puts forward relatively specific requirement...

AI Technical Summary

Problems solved by technology

Penetration measurement of fillet welds using conventional ultrasonic (UT) or ray (RT) techniques is difficult and inaccurate

It is difficult for UT inspection to distinguish the unpenetrated top signal from other defect signals or geometric reflection signals, and the resolution is poor

Moreover, the measurement of incomplete penetration relies on the amplitude method, and the quantitative accuracy is poor, which basically cannot meet the requirements for measurement accuracy in bridges.

Due to the need for back-mounting, RT technology is extremely difficult to construct and has low work efficiency. It is difficult to meet the needs of the project progress and the cost is also high. On the other hand, the transillumination thickness difference is large, so the imaging quality is poor and the sensitivity is low. use

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