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Effect of free water on fatigue performance of concrete subjected to compressive cyclic load
Highlights Effect of free water on fatigue life of concrete was clarified. Effect of water and cyclic load on failure mode of concrete were discussed. S–N curves of dry, saturated, and water-submerged concretes were determined. Impact mechanism of free water on fatigue behavior of concrete was revealed.
Abstract To clarify the effect of free water on the fatigue behaviour of concrete, dry, saturated, and water-submerged concretes were subjected to different stress levels of cyclic loads. The failure modes and S–N curves were determined. The evolution of fatigue deformation, the energy dissipation characteristics, and the impact mechanism were discussed. Water content was observed to affect the fatigue life of concrete. Owing to the interaction of free water, the fatigue life of concrete in saturated and water-submerged conditions reduced significantly compared to that of dry concrete. The compressive fatigue failure mode shifted from splitting failure in dry concrete to combined splitting and shearing failure in saturated concrete and shear failure in water-submerged concrete. The strain rate and dissipated energy of concrete in fatigue stage II increased with the water content and maximum stress level. The strain rate in stage II and the dissipated energy were logarithmically and linearly correlated with the fatigue life of concrete.
Effect of free water on fatigue performance of concrete subjected to compressive cyclic load
Highlights Effect of free water on fatigue life of concrete was clarified. Effect of water and cyclic load on failure mode of concrete were discussed. S–N curves of dry, saturated, and water-submerged concretes were determined. Impact mechanism of free water on fatigue behavior of concrete was revealed.
Abstract To clarify the effect of free water on the fatigue behaviour of concrete, dry, saturated, and water-submerged concretes were subjected to different stress levels of cyclic loads. The failure modes and S–N curves were determined. The evolution of fatigue deformation, the energy dissipation characteristics, and the impact mechanism were discussed. Water content was observed to affect the fatigue life of concrete. Owing to the interaction of free water, the fatigue life of concrete in saturated and water-submerged conditions reduced significantly compared to that of dry concrete. The compressive fatigue failure mode shifted from splitting failure in dry concrete to combined splitting and shearing failure in saturated concrete and shear failure in water-submerged concrete. The strain rate and dissipated energy of concrete in fatigue stage II increased with the water content and maximum stress level. The strain rate in stage II and the dissipated energy were logarithmically and linearly correlated with the fatigue life of concrete.
Effect of free water on fatigue performance of concrete subjected to compressive cyclic load
Sun, Xiaoyan (author) / Tian, Yu (author) / Yin, Wenwen (author) / Wang, Hailong (author)
2021-12-01
Article (Journal)
Electronic Resource
English
Concrete Cylinders Confined by CFRP Sheets Subjected to Cyclic Axial Compressive Load
| British Library Conference Proceedings | 2003