Concrete intensive grade is C25, the main variable parameters such as initial load and load history, CFRP amount, reinforcement ratio, anchor measure was adopted.
试验采用的混凝土强度等级为C25，主要变化参数为初始荷载及加载历史、CFRP加固量、纵筋配筋率、锚固措施等。
Fatigue crack propagation behaviour under variable amplitude loading is significantly influenced by load history induced sequence effects.
导致加载序列作用的加载历史极大地影响着变幅加载下的疲劳裂纹扩展行为。
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