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The major objective of this research was to find out to what degree the design rules for steel frames as given by the euro codes are applicable to composite structures. The project has addressed this aspect through experimental, numerical and analytical activities. Reference frames for static and seismic loading have been designed as the basis and starting point for the research performed. Modern design methods such as the semicontinuous joint concept and their effects on the overall structural behaviour were applied to realise an economic and practicable design. Full scale frame tests representing static and seismic loading were performed for the purpose of demonstration. The critical zones were located in the beam-to-column joints and were tested in isolation to allow for the overall structural interpretation and to calibrate numeric computations for non-linear structural analyses. Tests on modifications to the applied joints were also performed to meet other design requirements and to improve the experimental response. It can generally be stated that the overstrength of the material constitutes a problem in designing dissipative zones for both the global behaviour of frames as well as the local one of joints. This aspect is reflected in the assessment of the members/components that should contribute to the desired level of ductility which essentially determines the seismic response as well as the exploitation of the full plastic chain in static loading. The problem is widely discussed on the basis of numerical results from non-linear dynamic and static analyses. The applicability of analytical methods for the analytical verification of static frames and the component method for joints could be demonstrated. Furthermore, it was observed in tests that external composite joints exhibited a failure mode which is not yet covered by the component method.

Additional information

Authors: BITAR D, CTICM, Saint-Rémy-lès-Chevreuse;RYAN Y, CTICM, Saint-Rémy-lès-Chevreuse;CARAMELLI S, Università de Pisa, Pisa (IT);SALVATORE W, Università de Pisa, Pisa (IT);TAUCER F, ELSA Laboratory, Ispra (IT);JASPART J-P, Université de Liège, Liège (BE);DEMONCEAU J-F, Université de Liège, Liège (BE);HALLER M, ProfilArbed, Esch-sur-Azette (LU);GRIJALVO J, Labein, Bilbao (ES);HEISE F-J, Studiengesellschaft Stahlanwendung e.V., Düsseldorf (DE);KINDMANN R, Ruhr-Universität, Bochum (DE);KRAUS M, Ruhr-Universität, Bochum (DE);HOFFMEISTER B, RWTH, Aachen (DE);OPPE M, RWTH, Aachen (DE);STANGENBERG H, RWTH, Aachen (DE)
Bibliographic Reference: EUR 21913 EN (2006), 389 pp. Euro: 45
Availability: Katalogue Number: KI-NA-21913-EN-S The paper version can be ordered online and the PDF version downloaded at:
ISBN: ISBN: 92-79-00813-7
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