Observatory Column That Cracked Because of High Residual Stresses and Stress Raisers in the Welds
During construction of a revolving sky-tower observatory, a 2.4 m (8 ft) diam cylindrical column developed serious circumferential cracks overnight at the 14 m (46 ft) level where two 12 m (40 ft) sections were joined by a girth weld. The temperatures ranged from 12 deg C (53 deg F) to 7 deg C (45 deg F) that night. The column was shop fabricated in 12 m (40 ft) long sections of 19 mm (3/4 in.) thick steel plate of ASTM A36 steel. Crack initiation was caused by high residual stress during girth welding, and the presence of notches...
Observatory Column That Cracked Because of High Residual Stresses and Stress Raisers in the Welds, ASM Failure Analysis Case Histories: Buildings, Bridges, and Infrastructure, ASM International, 2019, https://doi.org/10.31399/asm.fach.bldgs.c0047512
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