Fatigue Damage and Its Influence on Permeability of Structural Concrete

Author(s): Y.F. Fu and S.Q. Zhang
Paper category: Proceedings
Book title: 3rd International RILEM Conference on Microstructure Related Durability of Cementitious Composites
Editor(s): Changwen Miao, Wei Sun, Jiaping Liu, Huisu Chen, Guang Ye and Klaas van Breugel
Print-ISBN: 978-2-35158-188-9
e-ISBN: 978-2-35158-189-6
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 297-305
Total Pages : 9
Language : English

Abstract: Concrete structures are subjected both to the external loads and to the environmental actions in practice. In the presented paper, a test method was designed to measure the fatigue damage of concrete. The effects of external cycled loads on the performance deterioration of concrete structures were investigated. The stress states, stress levels and fatigue load cycle number which applied on the structural concrete specimens were carefully designed and used to simulate the real feature of stressed structural concrete. Results show that the fatigue damage is sensitive to the stress states, stress levels and fatigue load cycle number for concrete specimens. Fatigue damage degree (FDD) was proposed to analyze the contribution of external loads on the permeability. An analytical model was proposed to represent the relationship between the fatigue damage and the cyclic actions. The concrete permeability is greatly connected with the fatigue damage. A fatigue-induced damage factor (FIDF) was proposed to establish the models of FDD and permeability for air and water medium. MIP results show that the fatigue damage greatly changes the micro- or meso- morphology of concrete.

Online publication : 2016
Publication type : full_text
Public price (Euros) : 0.00