海洋环境混凝土结构耐久性原位监测原理和剩余寿命预报  

THE IN-SITU MONITORING PRINCIPLES AND THE RESIDUAL LIFE PREDICTION OF THE DURABILITY OF CONCRETE STRUCTURE IN MARINE ENVIRONMENT

作　　者：干伟忠[1] 金伟良[2] RAUPACH M 

机构地区：[1]宁波工程学院混凝土结构耐久性研究所,浙江宁波315016 [2]浙江大学结构工程研究所,浙江杭州310027 [3]德国亚琛工业大学土木工程研究所,北威州亚琛52062

出　　处：《工程力学》2011年第A02期78-84,96,共8页Engineering Mechanics

基　　金：国家自然科学基金项目(51078190);国家国际科技合作重点项目(2005DFA70810);浙江省自然科学基金项目(Y1100403)

摘　　要：该文介绍了海洋环境中混凝土结构耐久性原位监测研究与应用的新近进展。内容包括混凝土结构耐久性监测的概念、原理和作用,欧洲第一代混凝土结构耐久性预埋式梯形阳极和后置式无损监测传感单元及其系统,以及通过国际合作研究发展的基于电化学原理和光纤辅助技术的第二代耐久性监测技术,尤其是结构各部位钢筋脱钝腐蚀的个性化判据捕获方法和作为后置作业前提的微创介入技术。工程实践表明:对混凝土结构中钢筋的腐蚀状态进行持续监测,是确保基础设施设计使用寿命的切实可行的耐久性设计措施;源自原位活体混凝土的耐久性综合信息可以用于结构剩余寿命的预测和预报。This paper introduces the recent development in the study and applications of the in-situ monitoring of concrete structures in marine environment. The author discusses the concept, theory and function of the monitoring of concrete structures, the first European generation of pre-embedded anode ladder of concrete structure durability and its system as well as the expansion ring anode and its system. More importantly, the paper includes the second generation of the durability monitoring techniques developed with international partners, based on the electrochemical principles and the optical fiber aided technology. The paper also discusses the personalized diagnostic criteria of corrosion after depassivation of different parts of the steel bar, the minimally invasive intervention, and the precondition ofpostposition. Practical results show that the consistent monitoring of the corrosion status of steel bar in concrete structures is a feasible measure in durability design, which ensures the life expectancy of basic facilities. Moreover, the durability information obtained from in-situ concrete might be applied to the residual life prediction of a structure.

关 键 词：海洋环境 混凝土结构 耐久性 无损监测 剩余寿命 

分 类 号：TU375[建筑科学—结构工程] U445.57[建筑科学—桥梁与隧道工程]