New prestressing technology based on iron-based shape memory alloys and its application in engineering

被引：0
|
作者：
Zhu H. [1 ,2 ]
Liu Z. [1 ]
Dong Z. [1 ,2 ]
Wu G. [1 ,2 ]
Wen Y. [3 ]
机构：
[1] Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing
[2] National and Local Joint Engineering Research Center for Intelligent Construction and Maintenance, Southeast University, Nanjing
[3] School of Mechanical Engineering, Sichuan University, Chengdu
来源：
Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2022年 / 52卷 / 02期
关键词：
Intelligent operation and maintenance; Iron-based shape memory alloys; New prestressing technology; Recovery stress; Shape memory effect;
D O I：
10.3969/j.issn.1001-0505.2022.02.024
中图分类号：
学科分类号：
摘要：
The latest research progress on iron-based shape memory alloys at home and abroad was reviewed, and the basic properties of iron-based shape memory alloys, such as shape memory effect, recovery stress, corrosion resistance and weldability, were introduced. The strengthening effect, key method and long-term performance of prestressing with iron-base shape memory alloy were summarized. The research results show that the new iron-based shape memory alloy can generate recovery stress of about 440 MPa at 160 ℃, and has good corrosion resistance and welding properties. The recovery stress generated by iron-based shape memory alloys can be applied to the structure in the form of active prestressing, resulting in increased bearing capacity, ductility and fatigue resistance. As a new prestressing material, iron-based shape memory alloys have been used in many foreign countries in the form of near-surface-mounted and external prestressed. The self-prestressing technology based on iron-based shape memory alloys has broad application prospects in the future for intelligent operation and maintenance of the entire chain of engineering structures. © 2022, Editorial Department of Journal of Southeast University. All right reserved.
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页码：402 / 416
页数：14
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