The thesis presents the treatment of welded structures from the point of view of stress
concentration and material fatigue. Discussed are various methods for dimensioning
such constructions, from the once widely used nominal stress approach to the Hot
spot stress method, which was developed after the emergence of the finite element
method. The thesis furthermore touches upon the evaluation of crane trusses and
the determination of stress concentration in their joints, focusing primarily on the
symmetrical K-joints. Also presented is the creation of an Ansys APDL parametric
model, which analyses such joints in truss structures made from circular tubes. The last
part of the thesis contains result discussion, determination of approximation equations
and comparison with results found in the literature. Our results and the ones from the
literature are quite different. Matching between results from parametric model and
approximation equations is also poor.
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