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Author(s):	Siburg, Carsten; Hegger, Josef
Title:	Experimentelle Untersuchungen zum Durchstanzen von Einzelfundamenten mit baupraktischen Abmessungen
Abstract:	Zur Beurteilung des Durchstanztragverhaltens von Einzelfundamenten mit baupraktischen Abmessungen wurden 13 Durchstanzversuche an Platten mit einer gleichmäßigen Sohlpressung durchgeführt. Das Versuchsprogramm an den quadratischen Fundamentplatten mit und ohne Durchstanzbewehrung umfasst Fundamentbreiten von b = 1,20 bis 2,70 m und Plattendicken zwischen h = 0,45 und 0,65 m bei Schubschlankheiten zwischen a&lgr;/d = 1,25 und 2,00. Neben den gemessenen Stahldehnungen der Biegezug- und der Bügelbewehrung werden die Dickenmessungen und Sägeschnitte herangezogen, um das innere Riss- und Tragverhalten zu beurteilen. Zusammen mit den bereits am Institut für Massivbau durchgeführten Durchstanzversuchen an Einzelfundamenten erlauben die neuen Versuche eine Beschreibung der Einflüsse aus dem Maßstabseffekt der Plattendicke, der Betondruckfestigkeit, dem Längsbewehrungsgrad und einer Durchstanzbewehrung. Experimental Investigations on Punching Behavior of Reinforced Concrete Footings with realistic dimensions To evaluate the punching shear behaviour of footings with realistic dimensions, punching tests on 13 uniformly loaded specimens were conducted. The dimensions of the footings were between 1.20 m and 2.70 m in square and the thickness of the footing varying between 0.45 m and 0.65 m, resulting in a shear slenderness a&lgr;/d between approximately 1.25 and 2.00. In all tests, the steel strains of the flexural reinforcement and the stirrups were monitored. To examine internal cracking and failure characteristic, the increase of the slab thickness was measured during testing and together with the saw cuts evaluated. The aim of the present test program in combination with former tests conducted at RWTH University is to study the main parameters, which affect the punching shear strength of footings such as size effect of the effective depth, concrete compression strength, flexural reinforcement ratio, and punching shear reinforcement.
Source:	Beton- und Stahlbetonbau 108 (2013), No. 7
Page/s:	452-461
Language of Publication:	German

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