کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
258701 | 503622 | 2012 | 11 صفحه PDF | دانلود رایگان |
Reduction mechanisms due to liquid permeation are studied on the fatigue strength of concrete under compression. Referring to the nucleation of micro-cracks, deformation and energy consumption characteristics of specimens are investigated. Reduction of the interfacial energy between solid and liquid plays a major role for the decrease in the strength of fatigued concrete under compression permeated by liquids. By suitable setting of the K value in the S–N curve equation considering the lower-limit stress ratio, it is possible to predict the fatigue life of concrete permeated by liquids with the reasonable accuracy.
► Fatigue process of concrete under compression is examined.
► K value in S–N equation declines depending on surface tension of permeating liquid.
► Fatigue life (cycles to failure) of concrete is highly affected by strain rate.
► Liquid permeation lowers interfacial energy to nucleate micro-cracks.
► Strain rate increase due to liquid permeation results in fatigue strength decrease.
Journal: Construction and Building Materials - Volume 37, December 2012, Pages 82–92