Research on the Fatigue Behavior of CA Mortar Used in Ballastless Slab Track of High Speed Railway
Research on the Fatigue Behavior of CA Mortar Used in Ballastless Slab Track of High Speed Railway
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发表时间：
2008
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通讯作者：
Li Zhichao
中科院分区：
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作者：
Li Zhichao
CA砂浆是板式轨道结构的关键部件，其疲劳性能对高速铁路的耐久性和安全性至关重要。研究了不同应力水平（0.9、0.85、0.8、0.75、0.7、0.65）和温度（20℃、-20℃）下，加载频率为10 Hz和正弦波下的疲劳行为。结果表明，CA砂浆的疲劳寿命与应力水平呈对数线性关系，CA砂浆的粘弹性保证了其在20℃下的良好疲劳性能。
CA mortar is the key component in the structure of slab track and its fatigue performance is critical to the durability and safety of high speed railway.The paper investigated its fatigue behavior under different stress levels(0.9,0.85,0.8,0.75,0.7,0.65) and temperatures(20 ℃,-20 ℃) with the loading frequency of 10 Hz and the sine wave.Results indicate that the fatigue life of CA mortar is logarithmically linear with stress levels and the viscoelasticity of CA mortar guarantees a good fatigue performance at-20 ℃.