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材料导报  2021, Vol. 35 Issue (z2): 194-199    
  无机非金属及其复合材料 |
基于DIC的UHPC加固锈蚀钢筋混凝土柱轴心受压性能研究
苏昊1,2, 杨俊1,2,3, 周建庭1,2, 王劼耘3, 王宗山2, 马兴林2
1 重庆交通大学,省部共建山区桥梁及隧道工程国家重点实验室,重庆 400074
2 重庆交通大学土木工程学院,重庆 400074
3 广西交通设计集团,南宁 530029
Research on Axial Compression Performance of Corroded RC Columns Strengthened with UHPC Based on DIC
SU Hao1,2, YANG Jun 1,2,3, ZHOU Jianting1,2, WANG Jieyun3, WANG Zongshan2,MA Xinglin2
1 State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing 400074, China
2 School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China
3 Guangxi Communications Design Group Co., Ltd., Nanning 530029, China
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摘要 为研究UHPC加固锈蚀后钢筋混凝土柱的力学性能、承载能力提升幅度以及破坏形态,本文设计了8根试件,通过电化学方式对所有试件进行锈蚀处理,再采用UHPC对部分试件加固,最后采用控制变量法分别对锈蚀率为10%、20%、30%的试验柱进行轴压破坏试验,采用DIC技术观测试件全场应变变化,对比分析了应变云图、极限承载力、峰值应变等参数。试验结果表明:未加固试件破坏形态随着锈蚀率的增加破坏更接近于脆性破坏,加固后试验柱破坏形态主要表现为UHPC加固层劈裂破坏;加固后试件极限承载能力提高幅度约为119%~128%,加固后试件破坏时只有一条主裂缝,整体性和抗裂性得到提高;加固后DIC应变云图更均匀,应变集中出现较早,更利于裂缝发展预测。
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苏昊
杨俊
周建庭
王劼耘
王宗山
马兴林
关键词:  桥梁工程  超高性能混凝土  锈蚀加固  DIC  荷载滑移曲线  极限承载力    
Abstract: In order to study the mechanical properties, bearing capacity improvement and failure mode of corroded reinforced concrete columns streng-thened by UHPC, a total of 8 specimens were designed. All specimens were corroded by electrochemical method, and then some specimens were strengthened by UHPC. Finally, the axial compression failure tests were carried out on the test columns with corrosion rates of 10%, 20% and 30% respectively by using the control variable method, DIC technology was used to observe the whole field strain changes of the specimens, and the strain nephogram, ultimate bearing capacity, peak strain and other parameters were compared and analyzed. The results show that the failure mode of the unreinforced specimens is closer to brittle failure with the increase of corrosion rate, and the failure mode of the strengthened columns is mainly split failure of UHPC strengthened layer; After reinforced, the ultimate bearing capacity of the specimens increases by 119% to 128%. When the specimens are damaged, there is only one main crack, and the integrity and crack resistance are improved; After reinforcement, DIC strain nephogram is more uniform and strain concentration appears earlier, which is more conducive to crack development prediction.
Key words:  bridge engineering    ultra-high performance concrete    corrosion reinforce    DIC    load sliding curve    ultimate bearing capacit
                    发布日期:  2021-12-09
ZTFLH:  TU3  
通讯作者:  yangjun@cqjtu.edu.cn   
作者简介:  杨俊,工学博士,重庆交通大学土木工程学院硕士生导师,现为省部共建山区桥梁及隧道工程国家重点实验室研究人员,主要从事桥梁工程相关的教学科研工作,研究方向包括:旧危桥梁加固与工程结构性能提升;桥梁新结构与超高性能混凝土(UHPC)材料等。发表论文14篇,第一作者SCI/EI收录5篇,主持国家自然科学基金青年科学基金项目1项、重庆市教委科技项目1项、重庆市科协项目1项。
苏昊,硕士研究生,2019年9月就读于重庆交通大学。主要从事UHPC在桥梁工程中运用领域的研究。
引用本文:    
苏昊, 杨俊, 周建庭, 王劼耘, 王宗山, 马兴林. 基于DIC的UHPC加固锈蚀钢筋混凝土柱轴心受压性能研究[J]. 材料导报, 2021, 35(z2): 194-199.
SU Hao, YANG Jun, ZHOU Jianting, WANG Jieyun, WANG Zongshan,MA Xinglin. Research on Axial Compression Performance of Corroded RC Columns Strengthened with UHPC Based on DIC. Materials Reports, 2021, 35(z2): 194-199.
链接本文:  
http://www.mater-rep.com/CN/  或          http://www.mater-rep.com/CN/Y2021/V35/Iz2/194
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