Fe-SMA材料补强钢结构疲劳性能综述  

State-of-the-Art on Fatigue Strengthening of Steel Structures by Using Fe-SMA Materials

作　　者：吴水根 余倩倩[2] WU Shuigen;YU Qianqian(Tongji Architectural Design(Group)Co.,Ltd.,Shanghai 200092,China;Department of Structural Engineering Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学建筑设计研究院(集团)有限公司,上海200092 [2]同济大学建筑工程系,上海200092

出　　处：《结构工程师》2022年第5期182-190,共9页Structural Engineers

基　　金：国家自然科学基金资助项目(51878485)。

摘　　要：钢结构基础设施在服役过程中,受到荷载和环境介质的共同作用,往往产生裂纹、锈蚀等损伤。铁基形状记忆合金(Fe-SMA)材料性能优良,价格相对低廉,可基于形状记忆效应,便捷地施加预应力,对疲劳损伤钢结构进行加固补强。本文对Fe-SMA材料补强钢结构疲劳性能已有相关研究工作进行综述,包括Fe-SMA材料恢复应力、Fe-SMA加固钢结构疲劳性能、环境温度和疲劳荷载对钢结构补强体系的影响,并和NiTinol-FRP复合材料补强钢结构疲劳性能进行了对比。Deterioration of steel infrastructure due to service loads and environmental agents has been one of the major concerns in civil engineering community. Recently,iron based shape memory alloy(Fe-SMA)materials have been considered as an anlternative in retrofitting of aging steel structurs. Based on the shape memory effect,they can be conveniently used to apply prestress in comparison with traditional prstress techniques. This paper presents a state-of-art on fatigue strengthening of steel structures by using Fe-SMA materials,including the recovery stress of Fe-SMA materials,fatigue strengthening based on Fe-SMA materials,and effects of environmental temperatures and fatigue loading on the strengthening systems. The FeSMA retrofitting system is also compared with that by NiTinol-FRP hybrid materials.

关 键 词：铁基形状记忆合金 钢结构 疲劳 补强 

分 类 号：TU391[建筑科学—结构工程]