铁基形状记忆合金加固钢梁和混凝土梁的加固机理与研究进展  

Strengthening Mechanism and Research Progress on Strengthening Steel Beam and RC Beam with Fe-based Shape Memory Alloys

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作  者:强旭红[1] 武亚鹏 姜旭 罗永峰[1] QIANG Xuhong;WU Yapeng;JIANG Xu;LUO Yongfeng(Department of Structural Engineering,Tongji University,Shanghai 200092,China;Department of Bridge Engineering,Tongji University,Shanghai 200092,China)

机构地区:[1]同济大学建筑工程系,上海200092 [2]同济大学桥梁工程系,上海200092

出  处:《结构工程师》2023年第6期214-228,共15页Structural Engineers

基  金:国家自然科学基金资助项目(52278206,52278207);国家重点研发计划重点专项(2020YFD1100400、2017YFB0304701);中央高校基本科研业务费(22120210577)。

摘  要:土木工程中钢梁或混凝土梁在服役过程中会发生开裂、损伤、老化和承载力退化等问题,常常需要对结构进行加固来保证其承载能力、延长其使用寿命。目前,应用铁基形状记忆合金(Fe-based shape memory alloys,Fe-SMA)对结构进行预应力加固被证明是一种高效可靠的方式。对形状记忆合金的形状记忆特性、激活回复性能和基本力学性能研究现状进行了梳理,对用Fe-SMA进行结构加固的热激励加固原理进行了阐述。在此基础上,从加固钢梁和混凝土梁两个方面,梳理了Fe-SMA构件和被加固结构之间的连接方法,根据加固需求和目的对现有研究和应用进行了分类分析和总结。最后,针对目前的研究与应用现状的不足之处,对Fe-SMA应用于结构加固进行了展望,以期促进其在土木工程领域的合理应用。In civil engineering,steel or concrete beams need to be reinforced to increase its load-bearing capacity and service life due to damage,aging and bearing capacity degradation under service conditions.At present,the application of Fe-based shape memory alloys(Fe-SMA)to reinforce the structure has been proved to be an efficient and reliable method.This article reviews the shape memory properties,activation recovery properties and basic mechanical properties of Fe-SMA.And the principle of thermal excitation for structural reinforcement using Fe-SMA is described.On this basis,the connection methods between Fe-SMA members and the reinforced structure are reviewed from the aspects of reinforcing steel beams and concrete beams,and the existing research and applications are classified,analyzed and summarized according to the needs and purposes of reinforcement.Finally,in view of the shortcomings of the current research and application,this paper puts forward the perspectives that need to be researched,in order to promote the reasonable application of Fe-SMA in the field of civil engineering.

关 键 词:铁基形状记忆合金 梁结构加固 材料性能 结构性能提升 

分 类 号:TU391[建筑科学—结构工程] TU37

 

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