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Author(s):	Nietner, Lutz; Schlicke, Dirk; Tue, Nguyen Viet
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Abstract:	Der nachfolgende Aufsatz behandelt die Berechnung und Messung von hydratationsbedingten Zwangspannungen in massigen Betonbauteilen. Dabei wird auf das zeitveränderliche und viskoelastische Materialverhalten des Betons und dessen Berücksichtigung innerhalb eines numerischen Berechnungsverfahrens besonders eingegangen. Die vorgestellten Zusammenhänge werden anhand eines Dehnstabmodells mathematisch beschrieben und innerhalb eines FE-Modells numerisch implementiert. Im Zuge des Betonierens einer Sohlplatte eines Schleusenbauwerks werden die Berechnungsergebnisse mit Messdaten für die Spannungsentwicklung verglichen und bewertet. Consideration of Viscoelasticity in Computation of Hydration induced Stresses in Massive Concrete Members The present document reports about the computation and measurement of hydration induced stresses in massive concrete structures. It focuses on the time dependent and viscoelastic material properties of concrete and their consideration within a numerical computation procedure. The presented relationships will be described mathematically by using a strain-rod-model and be implemented in a FEM-Model. The computed results will be compared and evaluated by using measured stress data obtained during the casting of a lock's base slab.
Source:	Beton- und Stahlbetonbau 106 (2011), No. 3
Page/s:	169-177
Language of Publication:	German

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