RESEARCH ON FATIGUE LIFE OF CFST ARCH BRIDGE TUBULAR JOINTS BASED ON THE METHOD OF NATURAL FLAW
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摘要: 通过模型试验比较钢管混凝土管节点和空心管节点的疲劳破坏行为,得出钢管混凝土管节点和空心管节点的疲劳破坏形态基本一致;提出用固有缺陷法预测钢管混凝土拱桥管节点疲劳寿命的方法,并用实例计算了钢管混凝土管节点的疲劳寿命,将该寿命与试验结果进行比较,验证了固有缺陷法在一定范围内预测钢管混凝土管节点疲劳寿命的合理性。Abstract: It is compured the fatigue failure mode of concrete- filled steel tube(CFST) joint to that of hollow tube joint using model test, it is known that there is a basic agreement between the two. It is also proposed a way of predicting the fatigue life of CFST arch bridge tubular joints based on the method of natural flaw. And the rationality of the method in a certain range is verified by a real example.
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