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

腐蚀损伤钢构件的水平二维行为和抗震性能

基本信息

批准号：
22760345
负责人：
NAGATA Kazutoshi
金额：
$ 2.75万
依托单位：
Nagoya Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Young Scientists (B)
财政年份：
2010
资助国家：
日本
起止时间：
2010 至 2011
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22760345/
关键词：
耐震構造鋼製部材腐食断面損傷水平2方向挙動ねじり耐荷力

项目摘要

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.

在日本，许多钢结构都面临着劣化问题。这类破损结构在大地震作用下会造成严重的破坏。确保此类结构在地震中的安全是必要的。然而，含腐蚀损伤结构的二维水平地震反应特性却鲜有人研究。因此，本研究拟对角部锈蚀损伤的矩形钢桥墩进行试验，以评价其二维受力性能。结果表明，不仅加筋板发生了局部屈曲，角部有腐蚀的桥墩角部也发生了局部屈曲。因此，与没有锈蚀的桥墩相比，有锈蚀的桥墩的强度劣化是显著的。因此，为了使结构在大地震中不会受到严重破坏，必须进行适当的维护。