(1 大连大学建筑工程学院, 大连 116622; 2 大连交通大学土木工程学院, 大连 116028)

摘要: 采用单向循环加载对钢筋混凝土柱受人工海水盐溶液腐蚀后进行形状记忆合金( SMA)加固,研究其受力性能. 试验结果表明:试件经盐溶液腐蚀后,SMA 加固试件的刚度、延性得到了较大的提升,而承载力提升不大,且随着盐溶液浓度的增加,其刚度、延性以及承载力提升幅度在减小甚至无明显变化,说明 SMA 丝加固对试件遭受一定浓度盐溶液腐蚀具有抵抗作用. 盐溶液浓度的增加会降低钢筋混凝土柱的承载力、刚度和延性,随着盐溶液浓度的增加,承载力降低幅度增大,耗能性能降低幅度变小. 盐溶液浓度为 15%时,SMA 加固试件的耗能性能比未腐蚀未加固试件高约 4 倍,表明 SMA 加固能很好地改善试件的耗能性能.

关键词: 钢筋混凝土柱; 海水腐蚀; 力学性能; 轴压性能; 形状记忆合金; 循环加载

中图分类号:TU375. 3 文献标志码:A 文章编号:1002-848X(2023)05-0063-05

DOI:10. 19701 / j. jzjg. 20211285

Study on axial compression performance of seawater corroded reinforced concrete columns strengthened by SMA reinforced by uniaxial cyclic loading

CAI Bangwen1, PEI Qiang1, CUI Di2, LI Weihong1

(1 College of Architectural Engineering, Dalian University, Dalian 116622, China;2 School of Civil Engineering, Dalian Jiaotong University, Dalian 116028, China)

Abstract:Unidirectional cyclic loading was used to perform shape memory alloy ( SMA) reinforcement and study itsmechanical properties. The test results show that after the specimens is corroded by salt solution, the rigidity and ductilityof the specimen is greatly improved by the reinforcemengt of SMA, but the bearing capacity has not improved much, andwith the increase of the salt solution concentration, its lifting range of rigidity, ductility and bearing capacity is reduced oreven has no obvious change, indicating that the SMA wire reinforcement has a resistance to corrosion of the specimentsubjected to a certain concentration of salt solution. The increase of the salt solution concentration will reduce the bearingcapacity, rigidity and ductility of the reinforced concrete column. With the increase of the salt solution concentration, thereduction of the bearing capacity will increase and the reduction of the energy consumption will be smaller. When the saltsolution concentration is 15%, the energy consumption performance of the SMA reinforced specimen is about 4 times higherthan that of the uncorroded unreinforced specimen, indicating that SMA reinforcement can well improve the energydissipation performance of the specimen.Keywords:reinforced concrete column; seawater corrosion; mechanical property; axial compression performance; shapememory alloy; cyclic loading

∗国家自然科学基金项目( 51878108),国家自然基金重点基金资助项目( 52032011),辽宁省重点研发计划指导计划项目(2019JH8 / 10100091),辽宁省教育厅科学科学研究面上项目(LJKZ1177).

第一作者:蔡榜文,硕士研究生,主要从事核电厂抗连续倒塌研究,Email:1651638984@ qq. com.

[引用本文] 蔡榜文,裴强,崔迪,等. 单轴循环加载海水腐蚀下的 SMA 加固钢筋混凝土柱轴压性能研究[ J]. 建筑结构,2023,53( 5):63-67,40. CAI Bangwen,PEI Qiang,CUI Di,et al. Study on axial compression performance ofseawater corroded reinforced concrete columns strengthened by SMA reinforced by uniaxial cyclic loading[ J]. BuildingStructure,2023,53(5):63-67,40.