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Bruchsicherheitsnachweis für Druckglieder

Bruchsicherheitsnachweis für Druckglieder

C. Menn

60,94 €
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Editorial:
Springer Nature B.V.
Año de edición:
1975
Materia
Ciencia: cuestiones generales
ISBN:
9783764308216
60,94 €
IVA incluido
Disponible

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Die genaus Berechnung der Traglast eines schlanken Druckgliedes nach der Theorie 2. Ordnung ist ausserordentlich aufwendig, da die Querschnittsstei­ figkeit zufolge der Rissebildung und der Nichtlinearität des Spannungs­ Stauchungs-Diagrammes des Betons schnittkraftabhängig ist. Die vorliegende Arbeit enthält einerseits Angaben zur Bestimmung des Bruchwiderstandes des Querschnittes und andererseits ein einfaches Verfahren zur Ermittlung der im Bruchzustand massgebenden Querschnittssteifigkeit. Mit dieser Steifig­ keit lässt sich die Verformungsberechnung wie bei rein elastischem Material­ verhalten durchführen. Umfangreiche Vergleiche mit der genauen Berechnung der Traglast aufgrund eines Computerprogrammes zeigen, dass die Zuverlässig­ keit des Verfahrens im Verhältnis zum erforderlichen Rechenaufwand sehr gut ist. Resurne Le calcul exact de la charge ultime d’une piece comprimee a grand elancement en suivant la theorie du 2eme ordre est particulierement laborieux. En effet, la rigidite flexionnelle de la section est fortement dependante de la forma­ tion des fissures ainsi que du diagramme contrainte-deformation du beton. Le present travail traite, d’une part du calcul de la resistance a la rup­ ture theorique d’une section et d’autre part d’une methode simple permettant de determiner la rigidite flexionnelle d’une section dans le stade ultime. A l’aide de celle-ci, le calcul des deformations peut s’effectuer d’apres les methodes usuelles. Differentes comparaisons avec des resultats exacts calcules a l’aide de l’ordinateur ont montre que ce proced~ donnait des re­ sultats tres satisfaisants et ceci tout en diminuant la duree du temps de calcul.

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