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国外文献 > 1.轴承 > 3. 材料与制造 > 材料性能

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标 题： Analytical demonstrations to assess residual bearing capacities of steel plate girder ends with stiffeners damaged by corrosion
评估因腐蚀损坏的加劲板钢梁端部剩余承载能力的分析性演示
作 者： Nauman Khurram
Eiichi Sasaki
Hiroshi Kihira
Hiroshi Katsuchi
Hitoshi Yamada
关键词： Bearing capacity  [承载能力]
Corrosion  [ 腐蚀]
Girder end  [ 梁端]
Stiffener damage  [ 加强筋损坏]
Residual stresses  [ 残余应力]
出版年： 2014
期刊名： Structure and Infrastructure Engineering
结构与基础设施工程
年卷期： 2014, vol.10, no.1/3
摘 要： Many field surveys depict that steel plate girder ends tend to corrode due to the leakage of water from construction joints and/or detention of rain water near bearing regions. In many cases, buckling failures of plate girders were observed due to the excessive loss of material at the bottom portion of bearing stiffeners. In this study, the effect on the buckling strength of steel plate girder due to the corrosion damage at bearing stiffeners was investigated. Fullscale experimental tests were performed on two plate girder ends to determine the bearing capacity. Bearing capacity and failure modes were also verified by numerical analyses. Initial imperfections and welding residual stresses were also taken into account in analytical models. The simulation of the model was extended to the various corrosion damages, considering different damaged heights and thicknesses of the bearing stiffener near weld seam. All results were plotted in terms of remaining bearing capacity versus damage thickness ratio keeping the damage height of the stiffener constant. In this study, a damage parameter Reduced Thickness Ratio was used to assess the ultimate capacity and buckling of steel plate girder end with various corrosion levels.

许多现场调查表明，由于施工接缝处漏水或承重区域附近积水滞留，钢板梁端部容易发生腐蚀。在许多情况下，观察到承重加强筋底部因材料过度损失而导致的钢板梁屈曲失效。本研究探讨了承重加强筋腐蚀损伤对钢板梁屈曲强度的影响。通过在两个钢板梁端部进行全尺寸实验测试，确定其承载能力，并利用数值分析验证了承载能力及破坏模式。在分析模型中，还考虑了初始缺陷和焊接残余应力。模型模拟进一步扩展至不同腐蚀损伤情况，分别考虑焊缝附近承重加强筋不同损伤高度和厚度。所有结果均以剩余承载能力与损伤厚度比的形式绘制，同时保持加强筋损伤高度不变。本研究采用损伤参数“减薄比”来评估不同腐蚀程度下钢梁端部的极限承载能力和屈曲性能。
中文内容为网络AI翻译，专业术语未必准确，仅供参考。

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