Degradation Mechanism of Reinforced Concrete Beam Subjected to Fatigue Loads and Seawater Erosion

Abstract:

The durability of coastal reinforced concrete bridge structures will be deteriorated during service due to fatigue loads and Chloride erosion. Through the microscopic tests of reinforced concrete beams after fatigue and seawater corrosion, 10 reinforced concrete beams divided into 5 groups subjected to different fatigue loads were investigated under the alternative action of seawater corrosion, where the deterioration of concrete was degraded. From the experiment, it can be concluded that there was significant self-healing phenomenon on the cracked beams by fatigue loading; And there was regular and clear microcracks in the beams when the maximum fatigue load between 0.16~0.24Pu; the cracks of the beams became obvious,micro cracks increased and crystals can be significantly seen in cracks and low lying location when the maximum fatigue load exceeds 0.24Pu.

• Periodical: Applied Mechanics and Materials (Volumes 744-746)
• Pages: 38-45
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.744-746.38
• Online since: March 2015
• Authors: Zi Jian Liu*, Bo Diao, Xiao Ning Zheng
• Keywords: Concrete Durability, Fatigue, Seawater Corrosion

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