非对称位移循环下钢筋混凝土柱的低周疲劳性能

为了利用屈服后位移幅值与低周疲劳寿命之间的关系，建立抗震钢筋混凝土结构的更为合理的破坏准则，在完成了对称位移循环下钢筋混凝土柱低周疲劳性能的第一个试验系列后，着重介绍六根非对称位移循环下钢筋混凝土柱的累积损伤发育特点及其低周疲劳寿命随位移幅值和正负位移幅值比的变化规律，并在此基础上给出了低周疲劳寿命与不同位移水平下正负位移幅值比之间关系的表达式。

Low-Cyclic Fatigue Behavior of Reinforced Concrete Columns Subjected to Non-Symmetric Displacement Cycling

For the sake of setting up more rational damage criteria for RC structures based on the relationship between displacement amplitude after yielding and low-cyclic fatigue life, this paper Presents six RC columns test results focusing on development of cumulative damage and low-cyclic fatigue life varying with displacement amplitude and positive/ negative displacement ratio. On this basis, expression is provided to describe the relation between low-cyclic fatigue life and positive/negative displacements amplitude ratio under different displacement levels.