Study on the Stress Relaxation Behavior of Large Diameter B-GFRP Bars Using FBG Sensing Technology
Corrosion of steel tendons in certain aggressive environments could lead to durability problems of civil engineering. More recently, fiber-reinforced polymer (FRP) rods have been introduced in the market as tendons for prestressed concrete structures because of their lower modulus behavior. However,...
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| Format: | Article |
| Language: | English |
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Wiley
2013-10-01
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| Series: | International Journal of Distributed Sensor Networks |
| Online Access: | https://doi.org/10.1155/2013/201767 |
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| author | Li Guo-wei Pei Hua-Fu Hong Cheng-yu |
| author_facet | Li Guo-wei Pei Hua-Fu Hong Cheng-yu |
| author_sort | Li Guo-wei |
| collection | DOAJ |
| description | Corrosion of steel tendons in certain aggressive environments could lead to durability problems of civil engineering. More recently, fiber-reinforced polymer (FRP) rods have been introduced in the market as tendons for prestressed concrete structures because of their lower modulus behavior. However, previous studies on the FRP mechanical time dependent behavior regarding the stress relaxation of large diameter GFRP have not been well understood. This paper investigates the influence of stress levels on the relaxation behavior of a GFRP bar griped with a seamless pipe under sustained deformations ranging from 30% to 60% of its ultimate strain. In order to study the behavior of stress relaxation, two basalt-glass fiber hybrid composite (B-GFRP) bars were developed and instrumented with fiber Bragg grating (FBG) strain sensors. It can be found that the test results reveal that the seamless pipe grip method can undertake 70% of ultimate tensile load of the B-GFRP bar, which can satisfy the requirement of stress relaxation of B-GFRP bar subjected to prestress. The model proposed for evaluating stress relaxation ratio can reflect the influences of the nature of B-GFRP bar and the property of grip method. |
| format | Article |
| id | doaj-art-1c1746943f4548c0911676b9f9f4c372 |
| institution | Kabale University |
| issn | 1550-1477 |
| language | English |
| publishDate | 2013-10-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Distributed Sensor Networks |
| spelling | doaj-art-1c1746943f4548c0911676b9f9f4c3722025-02-03T06:45:07ZengWileyInternational Journal of Distributed Sensor Networks1550-14772013-10-01910.1155/2013/201767Study on the Stress Relaxation Behavior of Large Diameter B-GFRP Bars Using FBG Sensing TechnologyLi Guo-wei0Pei Hua-Fu1Hong Cheng-yu2 Highway and Railway Engineering Institute, Hohai University, Nanjing, Jiangsu 210098, China Harbin Institute of Technology Shenzhen Graduate School, Department of Civil and Environmental Engineering, Shenzhen 518055, China Department of Civil Engineering, Shantou University, Shantou 515063, ChinaCorrosion of steel tendons in certain aggressive environments could lead to durability problems of civil engineering. More recently, fiber-reinforced polymer (FRP) rods have been introduced in the market as tendons for prestressed concrete structures because of their lower modulus behavior. However, previous studies on the FRP mechanical time dependent behavior regarding the stress relaxation of large diameter GFRP have not been well understood. This paper investigates the influence of stress levels on the relaxation behavior of a GFRP bar griped with a seamless pipe under sustained deformations ranging from 30% to 60% of its ultimate strain. In order to study the behavior of stress relaxation, two basalt-glass fiber hybrid composite (B-GFRP) bars were developed and instrumented with fiber Bragg grating (FBG) strain sensors. It can be found that the test results reveal that the seamless pipe grip method can undertake 70% of ultimate tensile load of the B-GFRP bar, which can satisfy the requirement of stress relaxation of B-GFRP bar subjected to prestress. The model proposed for evaluating stress relaxation ratio can reflect the influences of the nature of B-GFRP bar and the property of grip method.https://doi.org/10.1155/2013/201767 |
| spellingShingle | Li Guo-wei Pei Hua-Fu Hong Cheng-yu Study on the Stress Relaxation Behavior of Large Diameter B-GFRP Bars Using FBG Sensing Technology International Journal of Distributed Sensor Networks |
| title | Study on the Stress Relaxation Behavior of Large Diameter B-GFRP Bars Using FBG Sensing Technology |
| title_full | Study on the Stress Relaxation Behavior of Large Diameter B-GFRP Bars Using FBG Sensing Technology |
| title_fullStr | Study on the Stress Relaxation Behavior of Large Diameter B-GFRP Bars Using FBG Sensing Technology |
| title_full_unstemmed | Study on the Stress Relaxation Behavior of Large Diameter B-GFRP Bars Using FBG Sensing Technology |
| title_short | Study on the Stress Relaxation Behavior of Large Diameter B-GFRP Bars Using FBG Sensing Technology |
| title_sort | study on the stress relaxation behavior of large diameter b gfrp bars using fbg sensing technology |
| url | https://doi.org/10.1155/2013/201767 |
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