MoHamed Bneni | Zawia university (original) (raw)

Papers by MoHamed Bneni

Over the last twenty years, many investigators are used finite element software, to validate and ... more Over the last twenty years, many investigators are used finite element software, to validate and compare the FE results with their experimental research. This work focused on the development of a numerical model implemented by the ANSYS 2022R2 software, to simulate the flexural behavior of the RC beam. Numerical models are tested under four-point bending. To investigate the influence of reinforcement steel ratio and compressive strength of concrete on the flexural capacity of the model. The results indicated that the Finite Element model was able to predict the flexural behavior of the experimental test beam. Furthermore, the influence of different tensile reinforcement ratios has the most effect on the flexural behaviour of the FE models at maximum loads. While the change in concrete compressive strength has affected the flexural performance of the models. This influence shows slight increases in the first crack load and maximum loads of the models. Furthermore, cracking pattern behaviour at the final stage for numerical models showed a good agreement with experimental cracks behaviour.

Modelling and simulation of flexural behavior for reinforced concrete beams using ANSYS, 2023

Over the last twenty years, many investigators are used finite element software, to validate and ... more Over the last twenty years, many investigators are used finite element software, to validate and compare the FE results with their experimental research. This work focused on the development of a numerical model implemented by the ANSYS 2022R2 software, to simulate the flexural behavior of the RC beam. Numerical models are tested under four-point bending. To investigate the influence of reinforcement steel ratio and compressive strength of concrete on the flexural capacity of the model. The results indicated that the Finite Element model was able to predict the flexural behavior of the experimental test beam. Furthermore, the influence of different tensile reinforcement ratios has the most effect on the flexural behaviour of the FE models at maximum loads. While the change in concrete compressive strength has affected the flexural performance of the models. This influence shows slight increases in the first crack load and maximum loads of the models. Furthermore, cracking pattern behaviour at the final stage for numerical models showed a good agreement with experimental cracks behaviour.

Number of Journals918Number of Issues25,548Number of Articles299,775Article View64,066,407PDF Download111,906,596 Assessment of mechanical and durability properties of HPC used for tunnels at different temperatures, 2023

This work presents the mechanical and durability evaluation of high-performance concrete mixes us... more This work presents the mechanical and durability evaluation of high-performance concrete mixes used for tunnels after exposure to different temperatures. Nine HPC mixes were investigated. The first group has W/C ratios; of 0.25, 0.31, and 0.37. The second group has silica fume addition by about 5.0%, 10%, and 15% of cement weight. In the third group, polypropylene fibers were added to the concrete by the ratios of 0.211% from the concrete volume. The mechanical properties were measured at room temperature and after exposure to temperatures 400°C and 800°C for curing periods of 28 and 56 days. The durability was evaluated by water penetration depth at room temperature. Scanning electron microscopes were also carried out. The results indicate that at a temperature of 400°C, the compressive strength of the concrete increased. They decreased with further increases in temperature over 400°C to 800°C. At 400°C, the highest compressive strength improvement is achieved by about 18.2% after 56 days of curing in the case of 10% SF The addition of 0.211 polypropylene fibers significantly increased the compressive strength after curing for 56 days by about 32.1%. Moreover, at 800°C, the highest tensile strength improvement achieves by about 87.5% after curing for 56 days in the case of SF=10%. The lowest porous penetration depth of water was found for a mix containing W/(C+SF) = 0.37, silica fume =10%, and polypropylene fibers =0.211%.

Frattura ed Integrità Strutturale, 2020

Experimental and numerical programs were conducted to investigate the effect of concrete cover an... more Experimental and numerical programs were conducted to investigate the effect of concrete cover and area of main steel reinforcement on the flexural behavior of strengthened RC beams by near-surface mounted glass fiber reinforced polymeric (NSM GFRP) bars of different lengths. Nine beams divided into three main groups were tested under four-point bending. The three beams of the first group were strengthened by different lengths of GFRP bars and having a concrete cover of 50 mm, while the three beams in the second group were strengthened in a similar manner as those of the first group but the concrete cover was 30 mm. The main steel reinforcement in the first and second groups was 2Ø10. The three beams of the third group were similar to those of the first and second group but the main steel reinforcement was 2Ø16. The 3-D FE commercial ANSYS program was used for the numerical work. The experimental results showed that decreasing the concrete cover increased the flexural capacity of the strengthened RC beams but this improvement disappeared by decreasing the NSM GFRP bar length. The numerical results showed an agreement with the experimental results.

International Journal of Advances in Structural and Geotechnical Engineering

In recent years, the near-surface mounted, NSM, strengthening technique has been used to increase... more In recent years, the near-surface mounted, NSM, strengthening technique has been used to increase the load carrying capacity of concrete structures. This study focused on the development of a numerical modeling that can predict the behavior of reinforced concrete, RC, beams strengthened with NSM FRP rods. A three dimensional finite element, FE, analysis computer program ANSYS was conducted to obtain the response of the strengthened beams. The eight-node elements, solid 65, were used for the idealization of concrete while the reinforcement steel was idealized by using LINK 180. In this research, A nine different models were developed and implemented added to a control beam in the ANSYS to study effect of different parameters of such as GFRP bars length, tensile steel reinforcement ratios on the collapse behavior as observed from first crack load to fully collapse. The result obtained from the 3D FE analysis used in this study was the load-deflection curves simulating the behavior of reinforced concrete beams. Moreover the results indicated an increase in the first cracking load of reinforced beams by 17% compared with that of the control beam and improved the deflection due to different lengths and tensile reinforcement steel ratios.

In recent years, the near-surface mounted, NSM, strengthening technique has been used to increase... more In recent years, the near-surface mounted, NSM, strengthening technique has been used to increase the load carrying capacity of concrete structures. This study focused on the development of a numerical modeling that can predict the behavior of reinforced concrete, RC, beams strengthened with NSM FRP rods. A three dimensional finite element, FE, analysis computer program ANSYS was conducted to obtain the response of the strengthened beams. The eight-node elements, solid 65, were used for the idealization of concrete while the reinforcement steel was idealized by using LINK 180. In this research, A nine different models were developed and implemented added to a control beam in the ANSYS to study effect of different parameters of such as GFRP bars length, tensile steel reinforcement ratios on the collapse behavior as observed from first crack load to fully collapse. The result obtained from the 3D FE analysis used in this study was the load-deflection curves simulating the behavior of reinforced concrete beams. Moreover the results indicated an increase in the first cracking load of reinforced beams by 17% compared with that of the control beam and improved the deflection due to different lengths and tensile reinforcement steel ratios.

Frattura ed Integrità Strutturale

This work introduces an experimental study to evaluate the effect of elevated temperatures on the... more This work introduces an experimental study to evaluate the effect of elevated temperatures on the mechanical properties of high-performance concrete (HPC) mix with changes in Water-Cementitious ratios, W/(C+SF), Silica Fume percent, SF, and Polypropylene, PP, fiber contents. This mix was typically designed to satisfy the requirements of tunnel concrete. The compressive and indirect tensile strengths were measured at room temperature, RT, and after exposure to 400°C and 800°C. Moreover, SEM micrograph and EDS spot analysis tests were done to evaluate the effect of elevated temperatures. Fifteen mixes of HPC with different ratios of W/(C+SF), SF, and PP fiber were tested. According to the test results, the compressive strength values of design mixes increased significantly after exposure to 400°C. Moreover, using SF = 10%, the results indicated remarkable improvements in the compressive strength at 400°C and 800°C, in the case of the W/(C+SF) ratio of 0.31. On the other hand, the high...

Frattura ed Integrità Strutturale, 2020

Experimental and numerical programs were conducted to investigate the effect of concrete cover an... more Experimental and numerical programs were conducted to investigate the effect of concrete cover and area of main steel reinforcement on the flexural behavior of strengthened RC beams by near-surface mounted glass fiber reinforced polymeric (NSM GFRP) bars of different lengths. Nine beams divided into three main groups were tested under four-point bending. The three beams of the first group were strengthened by different lengths of GFRP bars and having a concrete cover of 50 mm, while the three beams in the second group were strengthened in a similar manner as those of the first group but the concrete cover was 30 mm. The main steel reinforcement in the first and second groups was 2Ø10. The three beams of the third group were similar to those of the first and second group but the main steel reinforcement was 2Ø16. The 3-D FE commercial ANSYS program was used for the numerical work. The experimental results showed that decreasing the concrete cover increased the flexural capacity of the strengthened RC beams but this improvement disappeared by decreasing the NSM GFRP bar length. The numerical results showed an agreement with the experimental results.

Latin American Journal of Solids and Structures, 2020

The use of near-surface mounted (NSM) Glass fiber reinforced polymer (GFRP) bars is one of the mo... more The use of near-surface mounted (NSM) Glass fiber reinforced polymer (GFRP) bars is one of the most popular and effective techniques for strengthening reinforced concrete (RC) beams. This paper presents an experimental research program to study the flexural strengthening of RC beams comparing two areas of bottom tensile reinforcing steel and three development lengths of NSM GFRP bars. The beam test results indicated that the beam flexural strength increased up to 110% and 58% for the cases of low and high tensile reinforcing steel ratios, respectively. The effect of the tensile reinforcing steel area on the critical value of the development length of NSM GFRP bars was also investigated. It was found that decreasing the axial stiffness ratio, reduced the strengthening efficiency and the critical development length of the NSM GFRP bars. Finally, a 3D Finite Element (FE) model using ANSYS was constructed and was validated using the experimental results. Good agreement was seen between experimental and FE model results.

Fracture and Structural Integrity, Mar 25, 2022

The use of near-surface mounted (NSM) Glass fiber reinforced polymer (GFRP) bars is one of the mo... more The use of near-surface mounted (NSM) Glass fiber reinforced polymer (GFRP) bars is one of the most popular and effective techniques for strengthening reinforced concrete (RC) beams. This paper presents an experimental research program to study the flexural strengthening of RC beams comparing two areas of bottom tensile reinforcing steel and three development lengths of NSM GFRP bars. The beam test results indicated that the beam flexural strength increased up to 110% and 58% for the cases of low and high tensile reinforcing steel ratios, respectively. The effect of the tensile reinforcing steel area on the critical value of the development length of NSM GFRP bars was also investigated. It was found that decreasing the axial stiffness ratio, reduced the strengthening efficiency and the critical development length of the NSM GFRP bars. Finally, a 3D Finite Element (FE) model using ANSYS was constructed and was validated using the experimental results. Good agreement was seen between experimental and FE model results.

Experimental and numerical programs were conducted to investigate the effect of concrete cover an... more Experimental and numerical programs were conducted to investigate the effect of concrete cover and area of main steel reinforcement on the flexural behavior of strengthened RC beams by near-surface mounted glass fiber reinforced polymeric (NSM GFRP) bars of different lengths. Nine beams divided into three main groups were tested under four-point bending. The three beams of the first group were strengthened by different lengths of GFRP bars and having a concrete cover of 50 mm, while the three beams in the second group were strengthened in a similar manner as those of the first group but the concrete cover was 30 mm. The main steel reinforcement in the first and second groups was 2Ø10. The three beams of the third group were similar to those of the first and second group but the main steel reinforcement was 2Ø16. The 3-D FE commercial ANSYS program was used for the numerical work. The experimental results showed that decreasing the concrete cover increased the flexural capacity of the strengthened RC beams but this improvement disappeared by decreasing the NSM GFRP bar length. The numerical results showed an agreement with the experimental results.

Over the last twenty years, many investigators are used finite element software, to validate and ... more Over the last twenty years, many investigators are used finite element software, to validate and compare the FE results with their experimental research. This work focused on the development of a numerical model implemented by the ANSYS 2022R2 software, to simulate the flexural behavior of the RC beam. Numerical models are tested under four-point bending. To investigate the influence of reinforcement steel ratio and compressive strength of concrete on the flexural capacity of the model. The results indicated that the Finite Element model was able to predict the flexural behavior of the experimental test beam. Furthermore, the influence of different tensile reinforcement ratios has the most effect on the flexural behaviour of the FE models at maximum loads. While the change in concrete compressive strength has affected the flexural performance of the models. This influence shows slight increases in the first crack load and maximum loads of the models. Furthermore, cracking pattern behaviour at the final stage for numerical models showed a good agreement with experimental cracks behaviour.

Modelling and simulation of flexural behavior for reinforced concrete beams using ANSYS, 2023

Over the last twenty years, many investigators are used finite element software, to validate and ... more Over the last twenty years, many investigators are used finite element software, to validate and compare the FE results with their experimental research. This work focused on the development of a numerical model implemented by the ANSYS 2022R2 software, to simulate the flexural behavior of the RC beam. Numerical models are tested under four-point bending. To investigate the influence of reinforcement steel ratio and compressive strength of concrete on the flexural capacity of the model. The results indicated that the Finite Element model was able to predict the flexural behavior of the experimental test beam. Furthermore, the influence of different tensile reinforcement ratios has the most effect on the flexural behaviour of the FE models at maximum loads. While the change in concrete compressive strength has affected the flexural performance of the models. This influence shows slight increases in the first crack load and maximum loads of the models. Furthermore, cracking pattern behaviour at the final stage for numerical models showed a good agreement with experimental cracks behaviour.

Number of Journals918Number of Issues25,548Number of Articles299,775Article View64,066,407PDF Download111,906,596 Assessment of mechanical and durability properties of HPC used for tunnels at different temperatures, 2023

This work presents the mechanical and durability evaluation of high-performance concrete mixes us... more This work presents the mechanical and durability evaluation of high-performance concrete mixes used for tunnels after exposure to different temperatures. Nine HPC mixes were investigated. The first group has W/C ratios; of 0.25, 0.31, and 0.37. The second group has silica fume addition by about 5.0%, 10%, and 15% of cement weight. In the third group, polypropylene fibers were added to the concrete by the ratios of 0.211% from the concrete volume. The mechanical properties were measured at room temperature and after exposure to temperatures 400°C and 800°C for curing periods of 28 and 56 days. The durability was evaluated by water penetration depth at room temperature. Scanning electron microscopes were also carried out. The results indicate that at a temperature of 400°C, the compressive strength of the concrete increased. They decreased with further increases in temperature over 400°C to 800°C. At 400°C, the highest compressive strength improvement is achieved by about 18.2% after 56 days of curing in the case of 10% SF The addition of 0.211 polypropylene fibers significantly increased the compressive strength after curing for 56 days by about 32.1%. Moreover, at 800°C, the highest tensile strength improvement achieves by about 87.5% after curing for 56 days in the case of SF=10%. The lowest porous penetration depth of water was found for a mix containing W/(C+SF) = 0.37, silica fume =10%, and polypropylene fibers =0.211%.

Frattura ed Integrità Strutturale, 2020

Experimental and numerical programs were conducted to investigate the effect of concrete cover an... more Experimental and numerical programs were conducted to investigate the effect of concrete cover and area of main steel reinforcement on the flexural behavior of strengthened RC beams by near-surface mounted glass fiber reinforced polymeric (NSM GFRP) bars of different lengths. Nine beams divided into three main groups were tested under four-point bending. The three beams of the first group were strengthened by different lengths of GFRP bars and having a concrete cover of 50 mm, while the three beams in the second group were strengthened in a similar manner as those of the first group but the concrete cover was 30 mm. The main steel reinforcement in the first and second groups was 2Ø10. The three beams of the third group were similar to those of the first and second group but the main steel reinforcement was 2Ø16. The 3-D FE commercial ANSYS program was used for the numerical work. The experimental results showed that decreasing the concrete cover increased the flexural capacity of the strengthened RC beams but this improvement disappeared by decreasing the NSM GFRP bar length. The numerical results showed an agreement with the experimental results.

International Journal of Advances in Structural and Geotechnical Engineering

In recent years, the near-surface mounted, NSM, strengthening technique has been used to increase... more In recent years, the near-surface mounted, NSM, strengthening technique has been used to increase the load carrying capacity of concrete structures. This study focused on the development of a numerical modeling that can predict the behavior of reinforced concrete, RC, beams strengthened with NSM FRP rods. A three dimensional finite element, FE, analysis computer program ANSYS was conducted to obtain the response of the strengthened beams. The eight-node elements, solid 65, were used for the idealization of concrete while the reinforcement steel was idealized by using LINK 180. In this research, A nine different models were developed and implemented added to a control beam in the ANSYS to study effect of different parameters of such as GFRP bars length, tensile steel reinforcement ratios on the collapse behavior as observed from first crack load to fully collapse. The result obtained from the 3D FE analysis used in this study was the load-deflection curves simulating the behavior of reinforced concrete beams. Moreover the results indicated an increase in the first cracking load of reinforced beams by 17% compared with that of the control beam and improved the deflection due to different lengths and tensile reinforcement steel ratios.

In recent years, the near-surface mounted, NSM, strengthening technique has been used to increase... more In recent years, the near-surface mounted, NSM, strengthening technique has been used to increase the load carrying capacity of concrete structures. This study focused on the development of a numerical modeling that can predict the behavior of reinforced concrete, RC, beams strengthened with NSM FRP rods. A three dimensional finite element, FE, analysis computer program ANSYS was conducted to obtain the response of the strengthened beams. The eight-node elements, solid 65, were used for the idealization of concrete while the reinforcement steel was idealized by using LINK 180. In this research, A nine different models were developed and implemented added to a control beam in the ANSYS to study effect of different parameters of such as GFRP bars length, tensile steel reinforcement ratios on the collapse behavior as observed from first crack load to fully collapse. The result obtained from the 3D FE analysis used in this study was the load-deflection curves simulating the behavior of reinforced concrete beams. Moreover the results indicated an increase in the first cracking load of reinforced beams by 17% compared with that of the control beam and improved the deflection due to different lengths and tensile reinforcement steel ratios.

Frattura ed Integrità Strutturale

This work introduces an experimental study to evaluate the effect of elevated temperatures on the... more This work introduces an experimental study to evaluate the effect of elevated temperatures on the mechanical properties of high-performance concrete (HPC) mix with changes in Water-Cementitious ratios, W/(C+SF), Silica Fume percent, SF, and Polypropylene, PP, fiber contents. This mix was typically designed to satisfy the requirements of tunnel concrete. The compressive and indirect tensile strengths were measured at room temperature, RT, and after exposure to 400°C and 800°C. Moreover, SEM micrograph and EDS spot analysis tests were done to evaluate the effect of elevated temperatures. Fifteen mixes of HPC with different ratios of W/(C+SF), SF, and PP fiber were tested. According to the test results, the compressive strength values of design mixes increased significantly after exposure to 400°C. Moreover, using SF = 10%, the results indicated remarkable improvements in the compressive strength at 400°C and 800°C, in the case of the W/(C+SF) ratio of 0.31. On the other hand, the high...

Frattura ed Integrità Strutturale, 2020

Experimental and numerical programs were conducted to investigate the effect of concrete cover an... more Experimental and numerical programs were conducted to investigate the effect of concrete cover and area of main steel reinforcement on the flexural behavior of strengthened RC beams by near-surface mounted glass fiber reinforced polymeric (NSM GFRP) bars of different lengths. Nine beams divided into three main groups were tested under four-point bending. The three beams of the first group were strengthened by different lengths of GFRP bars and having a concrete cover of 50 mm, while the three beams in the second group were strengthened in a similar manner as those of the first group but the concrete cover was 30 mm. The main steel reinforcement in the first and second groups was 2Ø10. The three beams of the third group were similar to those of the first and second group but the main steel reinforcement was 2Ø16. The 3-D FE commercial ANSYS program was used for the numerical work. The experimental results showed that decreasing the concrete cover increased the flexural capacity of the strengthened RC beams but this improvement disappeared by decreasing the NSM GFRP bar length. The numerical results showed an agreement with the experimental results.

Latin American Journal of Solids and Structures, 2020

The use of near-surface mounted (NSM) Glass fiber reinforced polymer (GFRP) bars is one of the mo... more The use of near-surface mounted (NSM) Glass fiber reinforced polymer (GFRP) bars is one of the most popular and effective techniques for strengthening reinforced concrete (RC) beams. This paper presents an experimental research program to study the flexural strengthening of RC beams comparing two areas of bottom tensile reinforcing steel and three development lengths of NSM GFRP bars. The beam test results indicated that the beam flexural strength increased up to 110% and 58% for the cases of low and high tensile reinforcing steel ratios, respectively. The effect of the tensile reinforcing steel area on the critical value of the development length of NSM GFRP bars was also investigated. It was found that decreasing the axial stiffness ratio, reduced the strengthening efficiency and the critical development length of the NSM GFRP bars. Finally, a 3D Finite Element (FE) model using ANSYS was constructed and was validated using the experimental results. Good agreement was seen between experimental and FE model results.

Fracture and Structural Integrity, Mar 25, 2022

The use of near-surface mounted (NSM) Glass fiber reinforced polymer (GFRP) bars is one of the mo... more The use of near-surface mounted (NSM) Glass fiber reinforced polymer (GFRP) bars is one of the most popular and effective techniques for strengthening reinforced concrete (RC) beams. This paper presents an experimental research program to study the flexural strengthening of RC beams comparing two areas of bottom tensile reinforcing steel and three development lengths of NSM GFRP bars. The beam test results indicated that the beam flexural strength increased up to 110% and 58% for the cases of low and high tensile reinforcing steel ratios, respectively. The effect of the tensile reinforcing steel area on the critical value of the development length of NSM GFRP bars was also investigated. It was found that decreasing the axial stiffness ratio, reduced the strengthening efficiency and the critical development length of the NSM GFRP bars. Finally, a 3D Finite Element (FE) model using ANSYS was constructed and was validated using the experimental results. Good agreement was seen between experimental and FE model results.

Experimental and numerical programs were conducted to investigate the effect of concrete cover an... more Experimental and numerical programs were conducted to investigate the effect of concrete cover and area of main steel reinforcement on the flexural behavior of strengthened RC beams by near-surface mounted glass fiber reinforced polymeric (NSM GFRP) bars of different lengths. Nine beams divided into three main groups were tested under four-point bending. The three beams of the first group were strengthened by different lengths of GFRP bars and having a concrete cover of 50 mm, while the three beams in the second group were strengthened in a similar manner as those of the first group but the concrete cover was 30 mm. The main steel reinforcement in the first and second groups was 2Ø10. The three beams of the third group were similar to those of the first and second group but the main steel reinforcement was 2Ø16. The 3-D FE commercial ANSYS program was used for the numerical work. The experimental results showed that decreasing the concrete cover increased the flexural capacity of the strengthened RC beams but this improvement disappeared by decreasing the NSM GFRP bar length. The numerical results showed an agreement with the experimental results.