Effect on buckling behavior and seismic performance of steel piers corrosion-damaged near ground

Takuma Rokutani, K. Nagata, T. Kitahara
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Abstract

In Japan, many steel structures were constructed during the period of the high economic miracle, and they are now more than 50 years old and are aging. Corrosion has been confirmed at corners and the boundary of concrete-wrapped concrete in steel piers. It was found that corrosion damage at the corner of steel piers causes a decrease of seismic performance in our previous investigations that carried out seismic response analysis. Subsequently, in this study, the effect of corrosion damage at the near ground edge of steel bridge piers with a rectangular cross-section was investigated in detail on the buckling behaviour and seismic performance of structures. As a result, it is found that the buckling at the base causes a decrease in load bearing performance compared to the buckling in the entire panel. It is necessary to properly maintain to prevent buckling at the base caused by corrosion.
近地腐蚀损伤钢桥墩屈曲性能及抗震性能的影响
在日本,许多钢结构建筑是在高经济奇迹时期建造的,它们现在已经有50多年的历史了,正在老化。钢筋桥墩角部和包覆混凝土边界处存在腐蚀现象。在以往的地震反应分析中发现,钢墩角部腐蚀损伤会导致其抗震性能下降。随后,本研究详细研究了矩形截面钢桥墩近地缘腐蚀损伤对结构屈曲行为和抗震性能的影响。结果发现,与整个面板的屈曲相比,底部屈曲导致承载性能下降。有必要进行适当的维护,防止因腐蚀引起的底部屈曲。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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