Horizontal 2 dimensional behaviors and seismic performance of steel members with corrosion damages

在日本，许多钢结构都面临着老化问题.在大地震作用下，这种结构的破坏将是严重的。有必要确保这些结构的地震安全性。然而，对于腐蚀损伤结构的二维水平地震反应特性的研究还很少。因此，在本研究中，实验旨在为矩形钢桥墩与损坏的腐蚀在角落里进行，以评估二维行为。结果表明，局部屈曲不仅发生在加劲板上，而且发生在角部腐蚀的桥墩的角部。因此，与未锈蚀桥墩相比，锈蚀桥墩的强度劣化是显著的。因此，为了使结构在大地震中不遭受严重破坏，适当的维修是必要的。

Many steel structures have been faced the problem of deteriorationin Japan. Severe damages will be caused in such deteriorated structures subjected to hugeearthquake. It is necessary to secure safety of such structures to earthquakes. However, 2dimensional horizontal behavior of seismic response of structures with damages bycorrosion has been hardly researched. Therefore, in this study experiments intended forrectangular steel bridge piers with damages by corrosion in the corners were conducted inorder to evaluate two-dimensional behavior. It was found that local buckling occurred atnot only the stiffened plates but also the corners in the piers which have corrosion at thecorners. Therefore, compared with a pier without corrosion, deterioration of strength of thepier with corrosions was remarkable. As a conclusion, suitable maintenance is necessary sothat structures may not receive severe damage in huge earthquake.