Author(s): Young Sohn

Abstract: Heat straightening field visit to a repair site revealed that real heat straightening repair process violated the limits and guidelines provided by FHWA due to time and economic issues. These violations include but are not limited to: (a) under heating below 1200°F, (b) over heating above 1200°F, (c) over straining above the restraining force limit (0.5 Mp), (d) multiple heat straightening of the same location more than two times, (e) No measurement of applied forces, (f) unclear temperature measurement, and (g) short cooling time. There is a lack of knowledge of the effects of these imperfections in the heat straightening repair process on the damaged-repaired steel beams. The fact that this is an ongoing concern suggests that further research, particularly field studies, is needed to evaluate the impact of these procedural imperfections on the repaired beams. Future studies could provide crucial data on how these variances affect the mechanical properties of steel, fatigue resistance, and the overall lifespan of repaired structures.

DOI: 10.22271/27078280.2024.v5.i2a.32

Pages: 25-27 | Views: 225 | Downloads: 87

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