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Modern plastic design for steel structures
Plastic design is used to take advantage of stress redistributions due to plastic strains exceeding the yield strain. Steel members that are designed plastically must have sufficient strain capacity in order to plastify at the spots of high stresses before fracture occurs. However, the minimum required strain capacity still cannot be quantified. It must be determined in terms of material properties that relate to the upper shelf toughness behaviour and it must be linked with the strain demand of the member due to the plastic design rules. Thus the project objective is the quantification of an upper shelf toughness criterion to allow safe plastic design of steel structures using modern construction steels. Plastic design is applied in two areas, namely: - for structures subjected to static loads; - for structures subjected to loads varying with time, which may change the direction or magnitudes repetitively, affecting the material resistance. Within this project the solutions for adequate toughness have been developed for both cases, for monotonically loaded structures and for structures subjected to time-varying loads which are developed in particular for structures subjected to seismic actions. Both experimental and numerical studies were carried out to determine the material demand due to existing design rules and the strain capacity using analytical approaches in terms of fracture mechanics and damage mechanics. The results allow for a transfer to other fields such as offshore structures and pressure vessels.
Modern plastic design for steel structures
Plastic design is used to take advantage of stress redistributions due to plastic strains exceeding the yield strain. Steel members that are designed plastically must have sufficient strain capacity in order to plastify at the spots of high stresses before fracture occurs. However, the minimum required strain capacity still cannot be quantified. It must be determined in terms of material properties that relate to the upper shelf toughness behaviour and it must be linked with the strain demand of the member due to the plastic design rules. Thus the project objective is the quantification of an upper shelf toughness criterion to allow safe plastic design of steel structures using modern construction steels. Plastic design is applied in two areas, namely: - for structures subjected to static loads; - for structures subjected to loads varying with time, which may change the direction or magnitudes repetitively, affecting the material resistance. Within this project the solutions for adequate toughness have been developed for both cases, for monotonically loaded structures and for structures subjected to time-varying loads which are developed in particular for structures subjected to seismic actions. Both experimental and numerical studies were carried out to determine the material demand due to existing design rules and the strain capacity using analytical approaches in terms of fracture mechanics and damage mechanics. The results allow for a transfer to other fields such as offshore structures and pressure vessels.
Modern plastic design for steel structures
Moderne plastische Bemessung von Stahlkonstruktionen
Schäfer, D. (author) / Eichler, B. (author) / Amlung, L. (author) / Vayas, I. (author) / Karlos, V. (author) / Spiliopoulos, A. (author) / Lippe, M. (author) / Kubon, Z. (author) / Kander, L. (author)
2010
159 Seiten, Bilder, Tabellen, 48 Quellen
Report
English
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