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Participating Formwork with CFRP Textile for Shape-Optimised Concrete Beams: Opportunities and Challenges

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Jayasinghe, A 
Momoh, E 
Hajsadeghi, M 
Orr, J 
Vinai, R 


Carbon emissions from concrete structural elements can be reduced by improving the material efficiency with shape optimisation. However, fabricating and reinforcing shape-optimised concrete beams is challenging due to the need for complex and curved geometries. This study conceptualises the use of dual-purpose stay-in-place participating formwork with CFRP textile for shape-optimised beams where the system acts as (a) the formwork for the optimised geometry, and (b) flexural and shear reinforce-ment. The development, preliminary analysis, and experimental results of a prototype beam with CFRP textile are presented in this paper. Participating formwork with CFRP textile offers an opportunity to reduce concrete consumption as a comparably easier construction method of shape-optimised beams but challenges persist in potential premature brittle failure modes.



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fib Symposium

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3rd fib Symposium on Concrete and Concrete Structures, Torino, 9th - 10th November 2023

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EPSRC (via University of Exeter) (118793R)