Assessment and Repair of Reinforced Concrete Structures Subject to Rust Damage.

受锈损影响的钢筋混凝土结构的评估和修复。

• 批准号: 61850089
• 负责人: FUJITA Yoshio
• 金额: $ 2.75万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research
• 财政年份: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1987
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-61850089/
• 关键词: 鉄筋コンクリート構造物; 腐食; 補修; 鋼板接着; 表面保護; 鉄筋コンクリート; 鉄筋腐食; 中性化; 塩分浸透; 電気防食; ひびわれ; かぶり

(1) In surveying the damage of the reinforced concrete structures in using seasand and in a sea environment, there is much cracking damages due to the rust formation in reinforcing bars. The application of the cracking index, which is defined as the difference in the average strain between concrete and reinforing bar, is a means of controlling rust damage in the concrete structures. It is found taht the allowable stress for reinforcing bars and the high quality for the rensile strain of the cover concrete are effective in preventing corrosion.(2) The repair system by using bonding plate for the concrete structures subjected to rust damage is popular with maintenance operation. In order to establish the validity and durability of this system, the experimental studies on the mechanical and durable behaviour of the reinforced concrete beams repaired with this operation are carried out. The system is effective to repair the concrete structure, but it is necessary to attend to the salt content in conctere and welding joint.

(1)在海砂使用和海洋环境中的钢筋混凝土结构的损伤调查中，由于钢筋锈蚀而引起的裂缝损伤较多。裂缝指数是混凝土与钢筋之间的平均应变差，它的应用是控制混凝土结构锈蚀破坏的一种手段。结果表明，钢筋的许用应力和保护层混凝土的高质量张拉应变是防止钢筋锈蚀的有效措施。(2)混凝土结构锈损后的粘固板修复是目前维修工程中普遍采用的方法。为了建立该系统的有效性和耐久性，进行了试验研究的力学和耐久性能的钢筋混凝土梁修复与此操作。该体系对混凝土结构的修补是有效的，但需要注意混凝土中的含盐量和焊接接头。

项目成果

N.Saeki,Y.Fujita and T.Ohta: "A Consideration on Crack and Corrosion of Steel in concrete" CAJ Review. 40. 110 - 111 (1986)

N.Saeki、Y.Fujita 和 T.Ohta：“关于混凝土中钢的裂纹和腐蚀的考虑”CAJ 评论。

佐伯昇: 寒地技術シンポジウム'86講演論文集. 536-541 (1986)

Noboru Saeki：寒冷地区技术研讨会 86 演讲记录 536-541 (1986)。

佐伯昇: セメント・コンクリート. No.482. (1987)

佐伯升：水泥/混凝土（1987）。

N.Saeki, K.Shimura and Y.Fujita: "Control for Deterioration of Reinforced Concrete Member due to Corrosion" Cold Region Technology Conference'87. 3. 461 -466 (1987)

N.Saeki、K.Shimura 和 Y.Fujita：“钢筋混凝土构件因腐蚀而劣化的控制”寒冷地区技术会议87。

佐伯昇: セメント技術年報. 40.

Noboru Saeki：水泥技术年度报告 40。