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Author(s):	Meier, Andreas
Title:
Abstract:	Die Bemessung von Stahlbetongründungsplatten erfolgt in der Praxis “quasi traditionell” oftmals lediglich für den Lastfall abfließende Hydratationswärme. Dabei werden in der statischen Berechnung bei der Ermittlung der erforderlichen Bewehrungsmenge zur Begrenzung der Rissbreite Annahmen und Vereinfachungen getroffen, die sich in der späteren Errichtung und Lebenszeit des Bauwerkes aber nicht wie angenommen darstellen. Eine Ursache, die zu einem Zeitpunkt oft deutlich nach Erstellung des Bauwerkes rissauslösend werden kann, ist der Lastfall später Zwang. Ziel des Beitrages ist es jedoch nicht, grundsätzlich zur Bemessung von Stahlbetongründungsplatten für den Lastfall später Zwang aufzufordern, sondern die Umgebungs- und Entstehungsbedingungen solcher Bauteile präziser in der statischen Berechnung zu erfassen. Hierzu werden im Folgenden einige Hinweise gegeben. The late restraint as an underestimated - but authoritative - load case in design The design of reinforced concrete slabs for foundation often occurs in the traditional way, i. e. for the load case of effluent hydration heat only. For this purpose the static calculation of the amount of reinforcement needed for the limitation of the crack width bases on assumptions and simplifications which often differ from the actual conditions during the construction process and the service lifeof the structure. One cause that may provoke cracks a long time after finishing the construction is the load case of late restraint. However, it is not the intention of the author to generally propagate the design of reinforced concrete slabs for foundations on basis of this load case. In fact this paper shows a way in order to carry out the static calculations more precisely with regards to the respective characteristic environmental conditions of such structures during their construction process and service life. In the following some comments are given to this topic.
Source:	Beton- und Stahlbetonbau 107 (2012), No. 4
Page/s:	216-224
Language of Publication:	German

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