Numerical study to investigate the behavior of reinforced concrete slabs with CFRP sheets

Abstract

The current study implements nonlinear finite-element analysis using ANSYS15 software for the preparation of models to investigate the behavior of reinforced concrete slabs strengthened with carbon fiber-reinforced polymer (CFRP) sheets. A comparison between the results of ANSYS, experimental works, and equations of Egyptian Standing Code (ESC) was made for strengthened slabs with different sheet areas. Also, comparisons were carried out between strengthened slabs with equivalent applied areas that differ in distributions. The effects of the change of main reinforcement, compressive strength of concrete, slab thickness, and sheet thickness on strengthened slab behavior were investigated. The results of ANSYS are in good agreement with equation of ESC. The strengthening of examined slabs with CFRP sheets improves the flexural strength capacity. The distribution of CFRP sheets enhances the performance of studied slabs. The increase in compressive strength of concrete, slab thickness, and sheet thickness leads to increase in failure load magnitude of strengthened slabs. The increase in the main reinforcement increases the failure load to a certain limit. For the studied slabs, reinforcement bigger than 12 mm in diameter leads to a reduction in failure load.

Enhancing the flexural load capacity of the reinforced concrete simply supported slabs using damaged tires strips (DTS)

“…Increasing the flexural load values due to the DTS were compared with the corresponding values when using CFRP for one-way slab models obtained by Omar and Rajai (2020) as well as the results of Rami, Jamal and Hasan (2016). On the other hand, results of the increasing in flexural load capacity of the two-way slab models obtained in the present study were compared with results obtained by Dina (2019), and Balamurugan and Viswanathan (2020), as listed in Table 4.…”

Analysis of flexural behavior of one-way reinforced concrete slab casted by shotcrete contain various types of plastic fibers

“…Similarly, (Gherbi et al, 2018) discovered that the flexural failure of an RC two-way slab modeled by Ansys and the failure load is extremely close to the results of the experimental approach. In 2019, (Emarah, 2019) compared the outcomes of ANSYS and Egyptian standing code (ESC) equations in terms of flexural behavior of RC slab strengthened with sheets of carbon fiber-reinforced polymer (CFRP). The results showed that there is a strong agreement between ANSYS and ESC.…”

Numerical study on the flexural performance of RC beams with externally bonded CFRP sheets

“…Nowadays, the need to strengthen and rehabilitate existing reinforced concrete (RC) structures has increased over the decades. It is often due to the original design limits, construction errors, progressive damages under aggressive environmental conditions [1][2][3]. Therefore, various retrofitting methods have been investigated and developed, e.g., waterproofing, jacking the deteriorated structural members to maintain or even improve their load-carrying capacity, strengthening RC structures using fiber-reinforced polymer (FRP), etc.…”