摘要
通过美国混凝土安全壳钢衬里锈蚀的一些典型案例说明了钢衬里的锈蚀特征,论述了钢衬里的锈蚀机理,介绍了国外学者对钢衬里锈蚀后力学性能变化、钢衬里局部锈蚀对安全壳完整性和易损性的影响进行的研究,最后论述了钢衬里锈蚀检测和修复技术。分析表明,安全壳钢衬里锈蚀包括由涂层失效引起的钢衬里内表面锈蚀和安全壳混凝土中的异物吸水导致的外表面锈蚀;钢衬里锈蚀对其强度影响不大,极限拉应变有较大程度的降低;钢衬里锈蚀深度小于原截面厚度的50%时,锈蚀对安全壳的完整性和易损性影响不大;当钢衬里锈蚀深度大于原截面厚度的50%时,锈蚀对安全壳的完整性和易损性将会产生较大影响。
Through some typical cases of steel linear corrosion of concrete containment in the United States, the corrosion characteristics of steel linearwere illustrated, the corrosion mechanism of steel linear was discussed, and the research of foreign scholars on the change of mechanical properties of steel linear after corrosion and the influence of local corrosion of steel linear on the integrity and vulnerability of containment were introduced. Finally, the methods for detecting and repairing the corrosion damage of steel linear were discussed. It is manifested that there are two kinds of corrosion for steel linear of containment. The first is inside surface corrosion caused by deterioration of the protective coating, and the second is outside surface corrosion initiated by foreign material embedded in the concrete of the containment. The corrosion of steel linear has little effect on its strength, and the ultimate tensile strain is greatly reduced.When the corrosion depth of steel linear is less than 50 % of the original section thickness, the corrosion has little effect on the integrity and vulnerability of the containment. When the corrosion depth of steel linear is greater than 50 % of the original section thickness, corrosion will have a great impact on the integrity and vulnerability of containment.
作者
郭俊营
李忠诚
李文旭
贡金鑫
GUO Junying;LI Zhongcheng;LI Wenxu;GONG Jinxin(State Key Laboratory of Nuclear Power Safety Monitoring Technology and Equipment,China Nuclear Power Engineering Co.,Ltd.,Shenzhen 518172,China;Faculty of Infrastructure Engineering,Dalian University of Technology,Dalian 116024,China)
出处
《建筑结构》
CSCD
北大核心
2022年第2期127-134,共8页
Building Structure
基金
“十三五”国家重点研发计划项目(2019YBF1900903)。
关键词
安全壳
钢衬里
锈蚀
力学性能
完整性
易损性
检测
修复
containment
steel linear
corrosion
mechanical properties
integrity
vulnerability
detection
repair
