Damage Theory Based Fatigue Simulation of Concrete Structure

Abstract:

The fatigue problem of concrete has long been studied through many different methods. However, the fatigue process and failure patterns of concrete structures have never been well simulated due to the lack of comprehensive understanding of the material properties under fatigue loads. In order to carry out an accurate simulation of the fatigue behavior of concrete structures, this paper proposes a new damage theory based fatigue constitutive model for concrete. The present model adopts two damage variables to describe the degradation of macro mechanical properties of concrete under tension and compression, respectively. And the tensile and compressive damage evolutions are related to the corresponding effective stress spaces. Specifically, by implementing the present model into the nonlinear finite element package, the bending fatigue process of a concrete beam is simulated. Meanwhile a set of numerical tests are presented, through which the validity and effectiveness of the proposed model for the simulation of concrete structures are illustrated.

• Periodical: Applied Mechanics and Materials (Volume 784)
• Pages: 51-58
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.784.51
• Online since: August 2015
• Authors: Jun Song Liang, Jie Li*
• Keywords: Concrete Structure, Damage Constitutive Model, Fatigue, Nonlinear Finite Element Analysis, Numerical Simulation

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