The objective of this work is to improve the punching strength and control the plastic deformation of two-way reinforced concrete (RC) slabs using carbon fiber reinforced polymer (CFRP) bars. The efficacy of this reinforcement technique was evaluated by constructing four reinforced concrete flat slabs. One specimen was utilized as a reference slab, while the other three specimens were reinforced using the Near Surface Mounted (NSM) CFRP bars approach. The slabs, which had identical dimensions and steel reinforcement, were exposed to patch load, and tested until they reached the point of failure. For evaluating the strength of two-way reinforced concrete (RC) slabs, the Concrete Plastic Damage (CDP) constitutive model was developed and implemented. CFRP bars are inserted into the slab at a depth from the tension face to enhance their strength. The investigation commences with the calibration of a numerical model utilizing data obtained from laboratory experiments. This will be achieved by establishing an advanced analytical method that incorporates the plasticity of concrete damage and the use of CFRP bars, along with a multiplier to determine the plastic limit load. Numerical simulations are employed to investigate shear dynamics by including diverse elements. The results showed that an increase in the ratio of strengthening had a significant effect on shear strength.

Strengthening RC Slabs with CFRP Bars Using the Plastic Limit Method to Control Plastic Deformation / Sharhan, Z. S.; Cucuzza, R.; Domaneschi, M.; Movahedi Rad, M.. - 59:(2024), pp. 96-104. (Intervento presentato al convegno 7th International Conference on Material Strength and Applied Mechanics, MSAM 2024 tenutosi a Gyor (Hun) nel 29 July 2024 through 1 August 2024) [10.3233/ATDE240532].

Strengthening RC Slabs with CFRP Bars Using the Plastic Limit Method to Control Plastic Deformation

Cucuzza R.;Domaneschi M.;Movahedi Rad M.
2024

Abstract

The objective of this work is to improve the punching strength and control the plastic deformation of two-way reinforced concrete (RC) slabs using carbon fiber reinforced polymer (CFRP) bars. The efficacy of this reinforcement technique was evaluated by constructing four reinforced concrete flat slabs. One specimen was utilized as a reference slab, while the other three specimens were reinforced using the Near Surface Mounted (NSM) CFRP bars approach. The slabs, which had identical dimensions and steel reinforcement, were exposed to patch load, and tested until they reached the point of failure. For evaluating the strength of two-way reinforced concrete (RC) slabs, the Concrete Plastic Damage (CDP) constitutive model was developed and implemented. CFRP bars are inserted into the slab at a depth from the tension face to enhance their strength. The investigation commences with the calibration of a numerical model utilizing data obtained from laboratory experiments. This will be achieved by establishing an advanced analytical method that incorporates the plasticity of concrete damage and the use of CFRP bars, along with a multiplier to determine the plastic limit load. Numerical simulations are employed to investigate shear dynamics by including diverse elements. The results showed that an increase in the ratio of strengthening had a significant effect on shear strength.
2024
9781643685472
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2996517