Axial behavior of circular steel tube with localized penetrating corrosion simulated by artificial notch
Axial behavior of circular steel tube with localized penetrating corrosion simulated by artificial notch
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人工缺口模拟局部穿透腐蚀圆形钢管的轴向行为
DOI：
10.1016/j.tws.2022.108944
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发表时间：
2022-03
影响因子：
6.4
通讯作者：
Guo Lanhui
中科院分区：
文献类型：
--
作者：
Gao Shan;Wang Yulin;Guo Lanhui
为了评估局部穿透腐蚀对圆钢管压缩性能的影响，采用26个人工缺口试件，从腐蚀类型、腐蚀长度和腐蚀方向三个方面进行了试验。实验结果表明，缺口方向对管道破坏模式的影响最为显著。裂纹缺口的闭合导致载荷-位移曲线出现双峰，有利于钢管的后屈曲行为。减小缺口的取向角会增加管材抗压性能的降低，而孔型缺口比裂纹型缺口更有利于管材抗压性能的降低。根据试验结果，用半经验公式描述了局部穿透腐蚀圆形短钢管抗压折减系数。参数分析结果表明，所提出的设计公式能够较好地预测具有局部穿透腐蚀的圆管的抗压性能。
Aiming to assess the compressive performance degradation of circular steel tube with localized penetrating corrosion, 26 specimens with artificial notch were tested by considering the corrosion type, corrosion length and corrosion orientation. The experimental results indicated that notch orientation shows the most remarkable effect on the failure model of the tubes. The close of crack notch which would result in the double peak in the load–displacement curve is beneficial for the post-buckling behavior of the tubes. Decreasing the orientation angle of notch would increase the reduction in the compressive resistance of the tubes whilst the type of hole notch is much more favorable than crack notch. Based on the test results, the reduction factors for the compressive resistance of circular short steel tubes with slim localized penetrating corrosion are described by a semi-empirical formula. The parametric analysis confirms that the proposed design formula predicts the compressive resistance of the circular tube with slim localized penetrating corrosion well.
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