Abstract
A new retrofitting system is proposed for reinforced concrete structures with application of near-surfaced mounted smart basalt fibre–reinforced polymer bar. The distributed optical fibre sensing technology, namely pre-pump pulse Brillouin optical time-domain analysis, is applied as the sensing technology for the smart bar. Then the proposed system is explained in detail from both self-sensing and strengthening. Finally, some experiments were implemented with reinforced concrete beams to verify the actual effects. From the results, it is concluded that the ultimate strength and the stiffness after steel rebar yielding can be increased obviously due to the high strength and ultimate strain of the smart basalt fibre–reinforced polymer bar. Meanwhile, the structure strain distribution can be measured with the smart basalt fibre–reinforced polymer bar, with which some key parameters can be well assessed, such as crack location, crack width, displacement and bending moment. However, the self-sensing effects indeed have been obviously influenced by the strain measurement accuracy especially after concrete cracking. Therefore, it is meaningful to improve the sensing accuracy especially for complicated strain. Additionally, some prestress upon the smart basalt fibre–reinforced polymer bar can improve both sensing and strengthening performance.
Highlights
Around the world, many reinforced concrete (RC) structures have been constructed for living and transportation
The PPPBOTDA has a spatial resolution of 10 cm, which means that the strain change should cover most part of the 10 cm so as to distinguish it
With the research in this article, some conclusions and remarks can be obtained as the follows: 1. With the smart basalt fibre–reinforced polymer (BFRP) bar, one innovative retrofitting system can be constructed for the RC structures
Summary
Many reinforced concrete (RC) structures have been constructed for living and transportation. These structures are of varying quality and function, but it is natural that they are all ageing and deteriorating over time. New demands from the transportation sector are increasing all the time. Under all these factors, many structures need to be upgraded or replaced. Many structures need to be upgraded or replaced The former method is economical and becoming more and more practical especially with the development of the new materials of high performance, such as fibrereinforced polymer (FRP)
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
