SEDL / STP / STP801-EB / STP44825S

Corrosion Fatigue of Welded Steel Joints under Narrow-Band Random Loading

Booth, GS
Senior Research Engineer, The Welding Institute, Abington, Cambridge,

Pages: 19    Published: Jan 1983

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Abstract

The object of the work was to provide useful information regarding the fatigue behavior of offshore platforms. Fatigue tests were carried out on welded steel joints under environmental conditions representative of the North Sea. These tests were carried out under narrow-band random loading in an attempt to simulate the variable-amplitude loading experienced by a platform.

The joints were tested in seawater under freely corroding, intermittently immersed, and cathodically protected conditions. Two mean stress levels were studied. The results were assessed using linear cumulative damage procedures based on both the design S-N curve and experimental constant-amplitude data.