Stesses in tank shell with shape deformation

In the paper are shown the results of measurements of stress state in the real tank. The tests were performed with the utilisation of electroresistant tensometry methods. The object of the tests was a vertical tank with nominal capacity of 12.000 m3 and a floating roof. The tank had been operated incessantly for almost 40 years. The shape deformation of the shell generating line was very large. This deformation fluctuated in the range from –170 to +150mm. The measurements of the stress state were used for verifying the values obtained by numerical analysis of the deformed cylindrical shell.
Kowalski D.: Stesses in tank shell with shape deformation, International Conference "DESIGN, INSPECTION, MAINTENANCE AND OPERATION OF CYLINDRICAL STEEL TANKS AND PIPELINES", Prague, 2003