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Mesoscale simulation of fatigue behavior of concrete materials damaged by freeze-thaw cycles

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Title: Mesoscale simulation of fatigue behavior of concrete materials damaged by freeze-thaw cycles
Authors: Gong, Fuyuan Browse this author
Ueda, Tamon Browse this author →KAKEN DB
Wang, Yi Browse this author
Zhang, Dawei Browse this author
Wang, Zhao Browse this author
Keywords: Concrete material
Frost damage
Fatigue behavior
Mesoscale simulation
Combined effect
Issue Date: 15-Jul-2017
Publisher: Elsevier
Journal Title: Construction and building materials
Volume: 144
Start Page: 702
End Page: 716
Publisher DOI: 10.1016/j.conbuildmat.2017.03.207
Abstract: Frost damage is a common durability problem for concrete structures in cold and wet regions, and in many cases, the frost damage is coupled with fatigue loadings such as the traffic loads on bridge decks or pavements. In this paper, to investigate the basic fatigue behavior of concrete materials affected by frost damage, a mesoscale approach based on Rigid Body Spring Method (RBSM) has been developed, of which the concrete material can be divided into three parts: mortar, coarse aggregate and interfacial transition zone (ITZ) between them. First, the cyclic constitutive laws are developed at normal and shear directions for mortar and ITZ, and verified with the existing experimental data in compression and tension fatigue. Then, several levels of frost damage are introduced by different numbers of freeze-thaw cycles (FTCs), and finally, the static tests and fatigue tests are conducted using the frost damaged concrete. The simulation results on the static strength and fatigue life show a good agreement with experimental data, and found that as the frost damage level (irreversible plastic deformation) increases, not only the static strength, but also the fatigue life at each stress level will decrease. The S-N curves of frost damaged concrete still follow a linear relationship but with bigger slopes, and the frost damaged concrete will become more ductile under fatigue loadings.
Rights: © 2017, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 上田 多門

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