If you were to strengthen concrete elements, which would you prefer? Reinforcing concrete elements with FRP rebars? How about coating the concrete with FRP jackets to strengthen it?
It really depends on what you are trying to accomplish. Do you want to increase the flexural strength, the shear strength of the ductility capacity?
I personally am a fan of using bonded FRP sheets for increasing the flexural capacity as the tend to be easier to apply than FRP rebars. The sheets can be applied directly to the member surface whereas the FRP bars are uusally need to be embedded.
Interested to hear some thoughts from others.
Please check this article...
Conference Paper State-of-the Art Review: Strengthening of Reinforced Concret...
Also, you might check this reference
https://www.mdpi.com/2073-4360/10/1/77
This website, ... I think will help you
https://www.structuraltechnologies.com/strengthening/
Might advice with ...." Structural Strengthening with Tstrata Enlargement Systems"
Check that, .. if will help you.
It also depends what performance you are trying to enhance and what is the state of your concrete structure.
For example, if you have an existing prestressed concrete structure with deteriorated strands, it may be best to strengthen it with additional prestressing (i.e. an active solution) designed to meet SLS and ULS criteria rather than adding a "passive" solution such as CFRP plates/sheets.
Dear Hamed Hasani,
My answer to you is that coating the reinforced concrete structural elements with FRP jackets is the best way to strengthen them. I have done large experimental investigations on strengthening of frame structure using FRP jackets and received the excellent results. See the attached file (PPT, presentation on FRP).
Best regards,
Mikayel Melkumyan
Doctor of Sciences (Engineering), Professor
Academician of the Saint-Petersburg Arctic Academy of Sciences
Academician of the Athens Institute for Education and Research
President of the Armenian Association for Earthquake Engineering
Vice-President of the International Association of CIS Countries on Base Isolation
Member of the American Association for Science and Technology
Foreign member of the Research Center of Seismic Resistant Structures of the Institute of Industrial Science, University of Tokyo
Eminent Expert of the Committee of Eminent Experts in International Research Base of Seismic Mitigation and Isolation of Gansu Province in China
Founder of the "Save the Yerevan Schools From Earthquakes" foundation
Director of the "Melkumyan Seismic Technologies" LLC
+374 (91) 94-54-02
Mikayel Grigor Melkumyan I appreciate your taking the time Prof. Melkumyan.
Nicholas Clemett Thank you very much for your consideration Mr. Clemett.
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