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Optimum design for fatigue of trusses welded from circular hollow sections
Internattional fatigue design rules have been worked out by the International Institute of Welding. These rules use the hot spot stress range concept. The aim of the present paper is to apply these rules to the optimum design of tubular trusses. Numerical examples of simple plane trusses with parallel chords subject to fluctuating loads are treated. K-type trusses with gap joints and N-type trusses with overlap are investigated. The volume of the structure is taken as the objective function. Constraints on fatigue strength of joints, on overall buckling of compression members as well as geometric limitations for overlap, gap, joint eccentricity and member sizes are considered. The optimum height is determined by means of the fully stressed designs calculated for several heights.
Optimum design for fatigue of trusses welded from circular hollow sections
Internattional fatigue design rules have been worked out by the International Institute of Welding. These rules use the hot spot stress range concept. The aim of the present paper is to apply these rules to the optimum design of tubular trusses. Numerical examples of simple plane trusses with parallel chords subject to fluctuating loads are treated. K-type trusses with gap joints and N-type trusses with overlap are investigated. The volume of the structure is taken as the objective function. Constraints on fatigue strength of joints, on overall buckling of compression members as well as geometric limitations for overlap, gap, joint eccentricity and member sizes are considered. The optimum height is determined by means of the fully stressed designs calculated for several heights.
Optimum design for fatigue of trusses welded from circular hollow sections
Optimale Dauerfestigkeit geschweisster Stahlrohrfachwerke
Farkas, J. (author)
Acta Technica Academiae Scientiarium Hungaricae ; 100 ; 51-65
1987
15 Seiten, 3 Bilder, 5 Tabellen, 16 Quellen
Article (Journal)
English
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