Study on the ultimate performance evaluation and recovering functionof steel bridges seriously damaged by corrosion

本文研究了由不同腐蚀形态的腐蚀腹板组成的钢板梁的极限抗剪强度。为了评估不同腐蚀模式对强度的影响，对带腐蚀腹板原形体的梁模型进行了试验研究。采用非线性有限元方法进行了参数化研究，以评估不同腐蚀模式对强度的影响。本文还讨论了腐蚀模式对极限抗剪强度的影响，以及在试验和分析结果中观察到的破坏模式。

In this research, the ultimate shear strength of steel plate girders composed by corroded web plates with different corrosion patterns are investigated. The tests on the girder models with the full scale original forms of corroded web plates have been carried out in order to assess the influence of different corrosion patterns on the strength. A parametric study using nonlinear finite element approach is also conducted to evaluate the effects of different corrosion patterns on the strength. The influence on the ultimate shear strength of the corrosion patterns is also discussed together with the failure patterns observed during tests and analytical results.