CONSTITUTIVE LAWFOR THE VISCOELASTIC BEHAVIOUR OF EARLY AGE CONCRETE IN MASSIVE STRUCTURES

Author(s): Wibke Hermerschmidt, Harald Budelmann
Book Title: RILEM International Symposium on Concrete Modelling - CONMOD 2014
Editor: Kefei Li, Peiyu Yan and Rongwei Yang
ISBN: 978-2-35158-139-1
e-ISBN: 978-2-35158-140-7
Publisher: RILEM Publications SARL
Publication year: 2015
Pages: 183-189
Total Pages: 7
Language: English

Abstract: In massive concrete structures heat of hydration can cause high internal temperatures leading to high tensile stresses that may induce cracking at early ages. For realistic calculation of strains and stresses an exact description of the time dependent evaluation of the heat release and the mechanical properties of early age concrete is necessary.

This paper presents experimental results and models for the description of thermal and mechanical properties of early age concrete. A new model based on an aging Kelvin chain is developed to describe the viscoelastic behaviour of hardening concrete. This model is able to describe the viscoelastic behaviour consistently distinguishing between reversible and irreversible strain parts for arbitrary boundary conditions. It uses an incremental formulation such that it can be implemented straightforwardly in finite element simulations using common time-integration methods.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00