A Design Process for Preventing Brittle Failure in Strengthening RC Slabs with Hybrid FRP-HPC Retrofit Systems SCIE SCOPUS

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Title
A Design Process for Preventing Brittle Failure in Strengthening RC Slabs with Hybrid FRP-HPC Retrofit Systems
Author(s)
Nguyen, Huy Q.; Han, Taek Hee; Park, Jun Kil; Kim, Jung J.
KIOST Author(s)
Han, Taek Hee(한택희)Park, Jun Kil(박준길)
Alternative Author(s)
한택희; 박준길
Publication Year
2023-01
Abstract
The retrofitting of existing RC slabs with an innovative system comprising FRP and HPC has been demonstrated to be effective in strengthening and overcoming the logistical challenges of installation. Nonetheless, the excessive improvement of flexural strength over shear strength would cause the sudden failure of rehabilitated flexural members. The literature has previously recommended failure limits to determine the additional moment strength compared with the shear strength to prevent brittle shear failure of strengthened, continuous RC slabs. This study suggests a design process for preventing shear failure and inducing the ductile-failure mode to improve the safety and applicability of retrofitted RC slabs based on the proposed failure limits. The effectiveness of the procedure in brittle-failure prevention for the end and interior spans of retrofitted RC slabs is illustrated via a case study. The outcomes showed that the retrofit system with 0.53-mm-thick-CFRP prevented brittle failure and significantly enhanced the design-factored load and ultimate failure load by up to 2.07 times and 2.13 times, respectively.
ISSN
1996-1944
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/43867
DOI
10.3390/ma16020755
Bibliographic Citation
Materials, v.16, no.2, 2023
Publisher
MDPI Open Access Publishing
Keywords
CFRP; high-performance concrete; brittle failure; reinforced concrete slab; retrofit
Type
Article
Language
English
Publisher
MDPI Open Access Publishing
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