Chemo‐hygro‐mechanical modelling and numerical simulation of concrete deterioration caused by alkali‐silica reaction
作者: F. BangertD. KuhlG. Meschke
作者单位: 1Institute for Structural Mechanics, Ruhr University Bochum, 44780 Bochum, Germany
2 Institute for Structural Mechanics (), Ruhr University Bochum, 44780 Bochum, Germany
刊名: International Journal for Numerical and Analytical Methods in Geomechanics, 2004, Vol.28 (7鈥?), pp.689-714
来源数据库: Wiley Journal
DOI: 10.1002/nag.375
关键词: concretedeteriorationalkali‐silica reactionfinite element methodmodelchemo‐hygro‐mechanical coupling
原始语种摘要: Abstract(#br)The paper presents a macroscopic model for the description of concrete deterioration caused by alkali–silica reaction (ASR). Based on concepts of the Theory of Porous Media, concrete is regarded as a mixture of three superimposed and interacting constituents: the skeleton, the pore liquid and the pore gas. The skeleton in turn represents a mixture of the unreacted, unswollen and the already reacted, swollen material. When ASR takes place, mass of the unreacted material is non‐instantaneously converted into mass of the reacted material. Since the unreacted material is characterized by a smaller density, the material swells. In the proposed model the dependence of the kinetics and the magnitude of the swelling process on the moisture content is taken into account. The...
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