A prestress testing method for the steel strands inside in-service structures based on the electrical resistance

被引：14

作者：

Zhang, Senhua ^{[1
,2
]}

Zhou, Jianting ^{[1
,2
]}

Tan, Kui ^{[1
,2
]}

Zhang, Hong ^{[1
,2
]}

Qian, Ji ^{[1
,2
]}

Liu, Huiling ^{[1
,2
]}

Liao, Leng ^{[1
,3
]}

机构：

[1] Chongqing Jiaotong Univ, State Key Lab Mt Bridge & Tunnel Engn, Chongqing 400074, Peoples R China

[2] Chongqing Jiaotong Univ, Sch Civil Engn, Chongqing 400074, Peoples R China

[3] Chongqing Jiaotong Univ, Sch Mat Sci & Engn, Chongqing 400074, Peoples R China

来源：

MEASUREMENT | 2021年 / 184卷

基金：

中国国家自然科学基金;

关键词：

Electrical resistance; In-service structure; Internal steel strand; Prestress; Non-destructive testing;

D O I：

10.1016/j.measurement.2021.109930

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

To test the prestress of internal prestress steel strands, the relationship between the resistance and the prestress was analyzed. The equivalent electrical models of the testing systems were established. The results of the prestress testing experiments showed that there was a nearly linear relationship between the resistance and the prestress. Steel strands with similar physical properties had similar resistance-stress relationships that were not influenced by the prestress variation. Connecting both ends of the steel strand to the testing circuit, the prestress of the inside steel strands could be measured outside the structures. Both in the structural construction phase and the operation phase, the prestress testing errors were about 10%. When testing long steel strands, the proposed method may have higher sensitivity and smaller errors.

引用

页数：9

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