標準設計横断歩道橋の階段床組みに生じる腐食形態とその進行

• Published in: Kou kouzou rombunshuu Vol. 32; no. 125; pp. 125_110 - 125_123
• Main Authors: 齊藤, 剛彦, 中島, 紗希, 三ツ木, 幸子, 門田, 峰典
• Format: Journal Article
• Language: Japanese
• Published: 一般社団法人 日本鋼構造協会 27.03.2025; Japanese Society of Steel Construction
• Subjects: corrosion form patterns; inspection record; stair floor deck; standard design pedestrian overpass; 標準設計横断歩道橋; 点検記録; 腐食形態パターン; 階段床組み
• ISSN: 1880-9928; 1884-0329
• DOI: 10.11273/jssc.32.125_110

The stair floor deck of the standard design pedestrian overpasses can cause a chain of corrosion along a water passes. In other words, it is necessary to take countermeasure to prevent corrosion while it is still minor for this part. However, currently problem is variation in the diagnosis of corrosion and effective record method need to be considered. In this study, corrosion form patterns of the stairs floor deck and occurrence rate of each pattern were considered by using inspection data. As a result, it was shown that by drawing the patterns obtained for cover plates, treads and risers on damage maps, it is possible to supplement the lack of information in the previous damage map and contribute to improving the validity of diagnosis.