Enhancing the Behavior of R.C. Continuous-Defected Slabs Using Strain-Hardening Cementitious Composites (SHCC)
| Autor: | mahmoud Abdelaziz, Emad Etman, Mohamed Hussien, Nesreen Kasem |
|---|---|
| Jazyk: | Arabic<br />English |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Journal of Engineering Research - Egypt, Vol 7, Iss Issue 2, Pp 169-182 (2023) |
| Druh dokumentu: | article |
| ISSN: | 2356-9441 2735-4873 |
| DOI: | 10.21608/erjeng.2023.212986.1182 |
| Popis: | Defected continuous slabs resulting from mistakes in the position of upper reinforcement over their intersection with beams can be repaired with many alternatives. Strain Hardening cementitious composite (SHCC) is among the modern alternatives appeared in the last years. This Paper highlights test results of nine double-span one-way reinforced concrete (R.C.) slabs tested under five- point where the control slab was manufactured without top reinforcement at the inner support. The main studied parameters were the position of SHCC layer relative to the concrete section, the thickness of SHCC layer, reinforcement ratio in SHCC layer, and development length of SHCC layer. The results showed that using SHCC layer with reinforcement ratios 0.38%, 0.5%, and 0.63% increases the cracking load in the positive region by 50%, 57.7%, and 69.5%, the cracking load in the negative region by 88.4%, 100%, and 111.5%, the ultimate load by 31.4% and 41.43%, and 58.6%, and the ductility by 16.8%, 86%, and 147%, respectively, compared to the control slab. It isn't prescribed to lessen the development length of the SHCC layer to 0.15 of the clear spans. The flexural capacity of the test slabs is generally underestimated by the suggested flexural prediction model based on forces equilibrium. The analytical/experimental results' average value ranged from 0.8 to 0.9, providing a good margin of error. |
| Databáze: | Directory of Open Access Journals |
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