Development of Method of Improving Inspectabilty of Existing Steel Girder Bridges

提高既有钢梁桥可检性方法的开发

• 批准号: 23560570
• 负责人: YAMAGUCHI Eiki
• 金额: $ 3.24万
• 依托单位: Kyushu Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23560570/
• 关键词: 端横桁; 鋼鈑桁橋; 腐食; 点検孔; ダブリング補強; 補剛材; 孔; 維持管理

The objective is to improve the inspectability of an end cross girder of a steel bridge. The finite element method is the mainstay, but the analysis of the whole bridge is an insurmountable task. The end cross girder model is therefore constructed first. Since the end cross girder is very susceptible to corrosion, the influence of corrosion on the load-carrying capacity of the end cross girder is investigated, showing that the corrosion can deteriorate the load-carrying capacity considerably. For the prevention, inspection is essential, but in many bridges it is not easy as the end cross girder is so close to a parapet. In the present study, the setup of an inspection hole is considered to solve the problem. To this end, the influence of an inspection hole on the load-carrying capacity is studied. It is found that not only the size and the shape but also the location influences load-carrying capacity. Reinforcement methods are then investigated and their effectiveness is revealed.

目的是提高钢桥端部横梁的可检测性。有限元方法是主流，但全桥的分析却是一项难以逾越的任务。因此首先构建端部横梁模型。由于端部横梁极易受到腐蚀，因此研究了腐蚀对端部横梁承载能力的影响，结果表明腐蚀会大大降低端部横梁的承载能力。为了预防，检查是必不可少的，但在许多桥梁中，这并不容易，因为端部横梁非常靠近女儿墙。在本研究中，考虑设置检查孔来解决该问题。为此，研究了检查孔对承载能力的影响。研究发现，不仅尺寸和形状，而且位置也会影响承载能力。然后研究强化方法并揭示其有效性。

项目成果

水平荷重を受ける端横桁の変形性状に及ぼす腐食の影響

水平荷载作用下腐蚀对端横梁变形性能的影响

• 发表时间: 2014
• 期刊: 構造工学論文集
• 作者: 山口栄輝,辻浩幸

Structural Behavior of corroded steel bridge girder

腐蚀钢桥梁的结构性能

• 发表时间: 2013
• 期刊: Proceedings of 6th Civil Engineering Conference in Asia Region
• 作者: Eiki Yamaguchi;Toshiaki Akagi
• 通讯作者: Toshiaki Akagi

Influence of local corrosion on load-carrying capacity of steel I-section girder end

局部腐蚀对工字钢梁端部承载能力的影响

• 发表时间: 2013
• 作者: Eiki Yamaguchi;Toshiaki Akagi
• 通讯作者: Toshiaki Akagi

Load- carrying capacity of corroded end cross-girder

腐蚀端部横梁承载能力

• 发表时间: 2013
• 期刊: Proceedings of the 29th US-Japan Bridge Engineering Workshop
• 作者: Eiki Yamaguchi;Hiroyuki Tsuji
• 通讯作者: Hiroyuki Tsuji

Load-carrying capacity of corroded end cross-girder

腐蚀端部横梁的承载能力

• 发表时间: 2013
• 期刊: Proceedings of 29th US-Japan Bridge Engineering Workshop
• 作者: Eiki Yamaguchi;Hiroyuki Tsuji
• 通讯作者: Hiroyuki Tsuji