Abstract
Abstract Fatigue tests have been carried out on rectangular hollow section K- and KT-joints with a brace to chord width ratio of 1·0, as this point design was believed to behave quite favourably with respect to its fatigue resistance. The investigation also comprised tests on joints with improved weld profiles and on joints subject to sea water environment. Only the effects of constant amplitude axial compressive and tensile brace loading were investigated. The test results have been statistically evaluated, thus establishing regression lines of mean values by the method of least squares. The investigation shows that the particular K-gap joint has a considerably better fatigue resistance than similar joints with a brace to chord width ratio of less than 1·0, and that the K-joint behaves better than the KT-joint. Improved weld profiles are favourable and the presence of sea water environment is disadvantageous, but none of these effects is significant.
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