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Author(s):	Alpermann, Holger; Gengnagel, Christoph
Title:
Abstract:	Der membranversteifte Träger ist ein neues hybrides Tragelement, bei dem die Membran eine unverzichtbare Rolle im Tragverhalten spielt. Der hier vorgestellte Träger hat die Geometrie eines Dreigurtbinders, bei dem drei Membranflächen die Profile kraftschlüssig verbinden und gegeneinander versteifen. Die Membranfläche im Obergurt erhöht die Knicklast des Obergurtes ausschlaggebend, die seitlichen Membranflächen dienen zur Aussteifung der Felder unter asymmetrischen Lasten. Die kontinuierliche Verbindung der Membran zu den Profilen verhindert Spannungsspitzen und erhöht die Knicklast der Profile. Das Tragverhalten des Trägers wird numerisch analysiert. Der Einfluss wichtiger Entwurfsparameter wird hinsichtlich des Tragverhaltens untersucht. Membrane restrained girder. The membrane restrained girder is a new hybrid, structural element, where the membrane is an indispensable part of the structural behaviour. The presented girder has the geometry of a three-chord truss. A flat membrane connects the chords with each other and restrains them. The membrane between the upper chords rises the buckling load decisive, the membranes on the side brace the fields between the struts against deformation under asymmetrical loads. The continuous connection of the membrane to the chords avoids stress-peaks and increases the buckling load of the chords. The structural behaviour of the girder is analysed numerical and the influence of important design-parameters examined.
Source:	Stahlbau 81 (2012), No. 5
Page/s:	373-378
Language of Publication:	German

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