Stiffness degradation of concrete members induced by reinforcement corrosion

钢筋腐蚀引起的混凝土构件刚度退化

• 批准号: DP140100529
• 负责人: Prof Gianluca Ranzi
• 金额: $ 20.97万
• 依托单位: The University of Sydney
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2014
• 资助国家: 澳大利亚
• 起止时间: 2014-02-25 至 2017-11-30
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP140100529
• 关键词: Stiffness; degradation; concrete; members; induced

Corrosion of steel reinforcement is the major cause of deterioration of reinforced concrete structures exposed to coastal and marine environments. In Australia, corrosion-related repair and rehabilitation costs about $13 billion annually. Research carried out to date on the effects of corrosion in concrete structures has not considered the effects of sustained loads and shrinkage on corrosion and the deterioration of member stiffness with time. This project will develop a new theoretical basis to characterise corrosion effects on the in-service behaviour of concrete structures, essential for adequate assessment of durability of existing structures and for the safe design of new structures.

钢筋腐蚀是暴露在沿海和海洋环境中的钢筋混凝土结构劣化的主要原因。在澳大利亚，与腐蚀相关的维修和修复每年花费约 130 亿美元。迄今为止对混凝土结构腐蚀影响的研究并未考虑持续荷载和收缩对腐蚀的影响以及构件刚度随时间的恶化。该项目将开发一个新的理论基础来表征腐蚀对混凝土结构在役行为的影响，这对于充分评估现有结构的耐久性和新结构的安全设计至关重要。