ESTABLISHMENT OF MAINTENANCE SYSTEM FOR CONCRETE STRUCTURES

混凝土结构养护体系的建立

• 批准号: 15206052
• 负责人: MIYAGAWA Toyoaki
• 金额: $ 26.12万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15206052/
• 关键词: concrete structure; maintenance system; deterioration phenomenon; mechanism of deterioration; reinforcing steel corrosion; verification of performance; repair and strengthening; load carrying performance; 複合劣化; 劣化モデル

In this research, the maintenance system of concrete structures for the sustainability and feasibility of social development was established.The results obtained in this study can be summarized as follows.(1)The procedure for choosing the repair and strengthening materials and/or techniques was shown. The recovery of durability performance on mainly safety and serviceability will be achieved using repair and strengthening materials and/or techniques. Especially, the safety performance of concrete structure subjected to the severe environment usually depends on the reinforcing steel corrosion, and it is important that the durability of (cover) concrete, which has the protective function for reinforcement essentially, is sufficient. Therefore, material durability tests or durability numerical simulations proposed the repair and strengthening materials, which could prevent the corrosion occurring or developing on the reinforcement.(2)The method to formularize the mechanical property of co … More ncrete, reinforcing steel and bond of concrete-steel in the whole life of concrete structure was shown by investigating the influence of deterioration or complex deterioration on the mechanical property of constituent materials of concrete structures. The procedure to predict the safety performance of concrete member or structure using those mechanical properties was also shown. Furthermore, non-destructive test for concrete structure(3)The maintenance of concrete structure should be considered at the beginning of total project, because the level of maintenance would influence the design and construction of concrete structure. The maintenance system is based on performance specifications including verification of performance, in the view of worldwide fashion of design code on concrete structures. The principal performances are about safety, serviceability, hazards to third parties, aesthetic appearance and durability, which should be verified in consideration of time dependent change in performance.(4)The guideline on repair and strengthening, which was applicable to simple or complex deterioration phenomenon, was proposed as a component of general maintenance system. Less

本研究旨在建立一套符合社会发展可持续性与可行性的混凝土结构维修保养系统。（1）提出了选择修补加固材料和技术的步骤。耐久性性能（主要是安全性和适用性）的恢复将通过修复和加固材料和/或技术来实现。特别是在恶劣环境下的混凝土结构，其安全性能往往取决于钢筋的锈蚀，而保护层混凝土的耐久性对钢筋起着保护作用。因此，材料耐久性试验或耐久性数值模拟提出了修复和加固材料，可以防止钢筋发生或发展腐蚀。（2）提出了复合材料力学性能的公式化方法。 ...更多信息 通过研究劣化或复合劣化对混凝土结构组成材料力学性能的影响，揭示了混凝土结构全寿命中混凝土、钢筋、混凝土-钢筋粘结等的作用机理。并给出了利用这些力学性能预测混凝土构件或结构安全性能的方法。混凝土结构的无损检测（3）混凝土结构的维修应在整个工程的开始阶段就考虑，因为维修水平的高低会影响到混凝土结构的设计和施工。鉴于混凝土结构设计规范的全球时尚，维护系统基于性能规范，包括性能验证。主要性能包括安全性、适用性、对第三方的危害、美观性和耐久性，应在考虑性能随时间变化的情况下对其进行验证。（4）提出了适用于简单或复杂劣化现象的维修和加固准则，作为一般维修制度的组成部分。少