Samer Barakat | University of Sharjah (original) (raw)

Papers by Samer Barakat

Research paper thumbnail of Creating Rutting Prediction Models through Machine Learning Techniques Utilizing the Long-Term Pavement Performance Database

Sustainability

Over time, roads undergo deterioration caused by various factors such as traffic loads, climate c... more Over time, roads undergo deterioration caused by various factors such as traffic loads, climate conditions, and material properties. Considering the substantial global investments in road construction, it is crucial to periodically assess and implement maintenance and rehabilitation (M and R) plans to ensure the network’s acceptable level of service. An integral component of the M and R plan involves utilizing performance prediction models, especially for rutting distress, a significant issue in asphalt pavement. This study aimed to develop rutting prediction models using data from the Long-Term Pavement Performance (LTPP) database, employing several machine learning techniques such as regression tree (RT), support vector machine (SVM), ensembles, Gaussian process regression (GPR), and Artificial Neural Network (ANN). These techniques are well-known for effectively handling extensive and complex datasets. To achieve the highest modeling accuracy, the parameters of each model were me...

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Research paper thumbnail of Flexural characterization and ductility assessment of small-scale mortar beams reinforced with 3D-printed polymers

Structures

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Research paper thumbnail of Reliability analysis of concrete beams reinforced with FRP bars

E3S Web of Conferences

The strength reduction factors (ϕ) adopted by ACI-440.1R-15 standard code for the flexure design ... more The strength reduction factors (ϕ) adopted by ACI-440.1R-15 standard code for the flexure design of Fiber Reinforced Polymers Reinforced Concrete (FRP-RC) beams are calibrated in this study. The code calibration process aims to achieve a particular target reliability index (βT) for the selected FRP-RC rectangular beams. An extensive experimental database is collected and used in the calibration process of the resistance factors. It was found that the calibrated ϕ led to a more economical and less conservative design while satisfying the safety requirements imposed by the design code. To meet the βT, a recommended value of ϕ, is found to be 0.70 for cast-in-situ beams failing in compression and 0.65 for tension-controlled cast-in-situ beams. Thus, the proposed values are slightly greater than comparable factors adopted by the ACI code of 0.65 for compressioncontrolled and 0.55 for tension-controlled cast-in-situ beams.

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Research paper thumbnail of Shear behavior of corrugated web panels and sensitivity analysis

Journal of Constructional Steel Research, 2018

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Research paper thumbnail of Shear buckling and stress distribution in trapezoidal web corrugated steel beams

Thin-Walled Structures, 2017

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Research paper thumbnail of Performance of wire rope isolators in the seismic protection of equipment

MATEC Web of Conferences, 2017

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Research paper thumbnail of Probabilistic assessment of ACI 318 minimum thickness requirements for two-way slabs

Australian Journal of Structural Engineering

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Research paper thumbnail of SCE codes and data

This data include all codes and algorithms used by the authors in the optimization presented in t... more This data include all codes and algorithms used by the authors in the optimization presented in the paper

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Research paper thumbnail of Optimization of Seismic Isolation Systems with Viscous Fluid Dampers Using Genetic Algorithms

Proceedings of the 5th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2015), 2015

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Research paper thumbnail of Effect of Drowsiness on Driver Performance and Traffic Safety

2020 Advances in Science and Engineering Technology International Conferences (ASET)

The occurrence of road traffic accidents is subjected to a variety of causes and one of them is d... more The occurrence of road traffic accidents is subjected to a variety of causes and one of them is drowsy driving. The presence of drowsy driving has been a critical contributor to road accidents worldwide. The purpose of this study is to analyze attitudes, behaviors, and opinions associated with fatigued or drowsy driving. The data were collected using a questionnaire-based survey in the United Arab Emirates and were descriptively analyzed. The results of the analysis showed that a wide number of drivers (71 percent) admitted that they drive while fatigued at least once a week. Out of all respondents, 27 percent admitted falling asleep behind the wheel before and 7 percent of them were involved in a crash related to nodding off. Moreover, the results also showed that most of the drivers prefer to either listen to the radio or talk to passengers to reduce drowsiness rather than stop and rest or nap. Overall, there is a need to raise awareness about the risk of drowsy driving since people tend to see other factors to be riskier. Also, this study highlights the necessity to counteract fatigued driving with treatments on-road and more education to the public. More research and crash data analysis are highly recommended to reach a clear conclusion and suggest certain treatments.

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Research paper thumbnail of Prediction of Punching Shear Capacity for Fiber-Reinforced Polymer Concrete Slabs Using Machine Learning

2022 Advances in Science and Engineering Technology International Conferences (ASET)

The punching shear capacity of slab structures is a critical design parameter. The existing speci... more The punching shear capacity of slab structures is a critical design parameter. The existing specifications in the majority of international reinforced concrete design standards for slab punching shear capacity are based on experiments of steel reinforced slabs. For fiber-reinforced polymer concrete slabs in particular, these conventional design methods may be insufficient to effectively estimate their punching shear capacity and the interaction of many influencing variables impacting punching shear capacity. In this study, several linear regression models and machine learning algorithms, namely support vector machine (SVM) models, were applied to predict FRP slabs' punching shear capacity accurately. A dataset of 103 points was gathered from experimental studies in literature and was used to train the models. The performance of each utilized model was assessed based on coefficient of determination (R2), root mean square error (RMSE), and mean absolute error (MAE) of the predicted punching shear capacity. The results demonstrated that the cubic SVM model outperformed all other models used in this study, with an R2 value of 0.95, RMSE of 74.61 kN, and MAE of 49.17 kN. Then, a sensitivity study was conducted, providing valuable insights on the influence of selected variables, namely slab effective depth (d), loading area (A), slab length (L), and concrete compressive strength (fc') on the punching shear capacity of FRP slabs. The results suggested that increasing the concrete compressive strength in FRP concrete slabs is advised at high d values (d > 145 mm), as increasing the fc' is more pronounced at higher slab effective depths. Moreover, a more pronounced effect at d > 145 mm was observed. Increasing the loading area reduces the punching shear capacity to a loading area/effective depth ratio of around 400. Above the ratio 400, increasing loading area increases the punching shear capacity.

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Research paper thumbnail of Concrete-to-concrete shear friction behavior under cyclic loading

E3S Web of Conferences

The main objective of this paper was to study the concrete-to-concrete shear friction behavior un... more The main objective of this paper was to study the concrete-to-concrete shear friction behavior under cyclic loading and different test rates. Eight dynamic push-pull tests were performed on concrete specimens with as-cast surface roughness type applying four different test rates. The test results include the hysteresis loops of the friction force-displacement relations. It is concluded that the dynamic coefficient of friction decreased with the increased test rate. This reduction in the dynamic coefficient of friction should be considered in the design of structural elements under cyclic or dynamic loading.

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Research paper thumbnail of Evaluation of the energy dissipation capacity of a steel damper

E3S Web of Conferences

This paper demonstrates the evaluation of the energy dissipation capacity of a steel damper made ... more This paper demonstrates the evaluation of the energy dissipation capacity of a steel damper made from mild steel plates through performing a finite element analysis simulating cyclic loading. Results aimed to obtain the damper characteristics incorporated in retrofitting frames to increase their seismic resistance and energy dissipation. The analysis has well captured the damper energy dissipation capacity and the effective stiffness. Results showed that stresses were concentrated on the diaphragm plate since it is the weakest part of the damper and where the failure is expected to occur. Also, the diaphragm plate was the first segment of the damper to yield and enter the plastic ranges.

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Research paper thumbnail of Design of the base isolation system with artificial neural network models

Proceedings of the 2020 the 4th International Conference on Compute and Data Analysis, 2020

This work presents the application of the artificial neural networks (ANN) for modeling and desig... more This work presents the application of the artificial neural networks (ANN) for modeling and designing Seismic-Isolation (SI) systems consisting of Natural Rubber Bearings and Viscous Fluid Dampers subject to Near-Field (NF) earthquake ground motion. Four lumped-mass stick models representing a realistic five, ten, fifteen, and 20-story base-isolated buildings are used. The key response parameters selected to represent the behavior of SI system are the Damper Force (PDF), Total Maximum Displacement (DTM), the Peak the Top Story Acceleration Ratio (TSAR) of the isolated structure compared to the fixed-base structure and the maximum amplified drift ratio (δmax). Twenty-four NF earthquake records representing two seismic hazard levels are used. The commercial analysis program SAP2000 was used to perform the Time-History Analysis (THA) of the MDOF system (stick model representing a realistic N-story base-isolated building) subject to all 24 records. Different combinations of damping coefficients (c) and damping exponents (ą) are investigated under the 24 earthquake records to develop the database of feasible combinations for the SI system. The total number of considered THA combinations is 751680 and were used for training and testing the neural network. Mathematical models for the key response parameters are established via ANN and produced acceptable results with significantly less computation. The results of this study show that ANN models can be a powerful tool to be included in the design process of Seismic-Isolation (SI) systems, especially at the preliminary stages.

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Research paper thumbnail of Impact response and endurance of unreinforced masonry walls strengthened with cement-based composites

Structures, 2022

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Research paper thumbnail of Numerical investigation on redundancy of bridges with AASHTO I-girders

Bridge Structures, 2021

Bridge safety is one of the most critical concerns among civil engineering fields due to its high... more Bridge safety is one of the most critical concerns among civil engineering fields due to its high importance. The redundancy of bridges was heavily investigated in the literature; however, they were focused on twin girder redundancy cases. Additionally, literatures were scarce in studies that focused on the improvement that should be made to achieve redundancy systems in different AASHTO I-girder types. Thus, this study focused on assessing the additional required number of tendons for different AASHTO I-girder types and spacing between them to achieve the redundancy of I-girder bridges. The additional unbonded tendons are suggested to be added externally or internally. The parameters varied in this study are compressive strength of ultrahigh-performance concrete (UHPC), spacing between girders (i.e. number of girders) and type of girders. Leap Bridge Concrete software was used to simulate the required structural modes. After performing extensive numerical analyses following AASHTO ...

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Research paper thumbnail of Shear Strengthening of T-Section RC Beams Using Double-Side Externally Bonded CFRP

IOP Conference Series: Materials Science and Engineering, 2020

This paper aims at investigating the effect of S-wrap EB-CFRP to shear-strengthen RC T-beams. The... more This paper aims at investigating the effect of S-wrap EB-CFRP to shear-strengthen RC T-beams. The experimental program included seven 3.3m-span T-beams that were tested under three-point loading. The specimens were divided into two major groups, including four specimens with no steel stirrups (Group 1), and three specimens with steel stirrups at half of the effective depth (d/2) center to center spacing (Group 2). Five of the seven specimens were strengthened in shear using S-wrap EB-CFRP strips used at d/4 and d/2 spacings. The shear capacity, maximum deflection under the applied load, failure mode, and the strain development in the CFRP strips, steel stirrups, and the main tensile reinforcement were reported in this paper. The overall results show that the addition of EB-CFRP strips to T-beams is an effective method of enhancing the shear capacity of T-Beam in the absence of steel stirrups. With the presence of steel stirrups in the T-beams, the contribution of the EB-CFRP strips ...

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Research paper thumbnail of Normalized shear strength of trapezoidal corrugated steel webs

Journal of Constructional Steel Research, 2017

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Research paper thumbnail of Effect of fibers and welded-wire reinforcements on the diaphragm behavior of composite deck slabs

Steel and Composite Structures, 2015

Twelve large-scale composite deck slabs were instrumented and tested in a cantilever diaphragm co... more Twelve large-scale composite deck slabs were instrumented and tested in a cantilever diaphragm configuration to assess the effect of fibers and welded wire mesh (WWM) on the in-plane shear capacity of composite deck slabs. The slabs were constructed with reentrant decking profile and reinforced with different types and dosages of secondary reinforcements: Conventional welded wire mesh (A142 and A98); synthetic macro-fibers (dosages of 3 kg/m 3 and 5.3 kg/m 3 ); and hooked-end steel fibers with a dosage of 15 kg/m 3 . The deck orientation relative to the main beam (strong and weak) was also considered in this study. Fibers and WWM were found efficient in distributing the applied load to the whole matrix, inducing multiple cracking, thereby enhancing the strength and ductility of composite deck slabs. The test results indicate that fibers increased the slab's ultimate in-plane shear capacity by up to 29% and 50% in the strong and weak directions, respectively. WWM increased the ultimate in-plane shear capacity by up to 19% in the strong direction and 9% in the weak direction. The results suggest that discrete fibers can provide comparable diaphragm behavior as that with the conventional WWM.

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Research paper thumbnail of Effect of material nonlinearity in unidirectional composites on the behavior of beam structures

International Journal of Solids and Structures, 2000

... Barbero et al. (1993) presented a formal engineering approach for the mechanics of thin-walle... more ... Barbero et al. (1993) presented a formal engineering approach for the mechanics of thin-walled laminated beams based ... 2. Objectives. The present study is aimed to investigate the effect of material nonlinearity in unidirectional composites on the behavior of beam structures ...

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Research paper thumbnail of Creating Rutting Prediction Models through Machine Learning Techniques Utilizing the Long-Term Pavement Performance Database

Sustainability

Over time, roads undergo deterioration caused by various factors such as traffic loads, climate c... more Over time, roads undergo deterioration caused by various factors such as traffic loads, climate conditions, and material properties. Considering the substantial global investments in road construction, it is crucial to periodically assess and implement maintenance and rehabilitation (M and R) plans to ensure the network’s acceptable level of service. An integral component of the M and R plan involves utilizing performance prediction models, especially for rutting distress, a significant issue in asphalt pavement. This study aimed to develop rutting prediction models using data from the Long-Term Pavement Performance (LTPP) database, employing several machine learning techniques such as regression tree (RT), support vector machine (SVM), ensembles, Gaussian process regression (GPR), and Artificial Neural Network (ANN). These techniques are well-known for effectively handling extensive and complex datasets. To achieve the highest modeling accuracy, the parameters of each model were me...

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Research paper thumbnail of Flexural characterization and ductility assessment of small-scale mortar beams reinforced with 3D-printed polymers

Structures

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Research paper thumbnail of Reliability analysis of concrete beams reinforced with FRP bars

E3S Web of Conferences

The strength reduction factors (ϕ) adopted by ACI-440.1R-15 standard code for the flexure design ... more The strength reduction factors (ϕ) adopted by ACI-440.1R-15 standard code for the flexure design of Fiber Reinforced Polymers Reinforced Concrete (FRP-RC) beams are calibrated in this study. The code calibration process aims to achieve a particular target reliability index (βT) for the selected FRP-RC rectangular beams. An extensive experimental database is collected and used in the calibration process of the resistance factors. It was found that the calibrated ϕ led to a more economical and less conservative design while satisfying the safety requirements imposed by the design code. To meet the βT, a recommended value of ϕ, is found to be 0.70 for cast-in-situ beams failing in compression and 0.65 for tension-controlled cast-in-situ beams. Thus, the proposed values are slightly greater than comparable factors adopted by the ACI code of 0.65 for compressioncontrolled and 0.55 for tension-controlled cast-in-situ beams.

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Research paper thumbnail of Shear behavior of corrugated web panels and sensitivity analysis

Journal of Constructional Steel Research, 2018

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Research paper thumbnail of Shear buckling and stress distribution in trapezoidal web corrugated steel beams

Thin-Walled Structures, 2017

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Research paper thumbnail of Performance of wire rope isolators in the seismic protection of equipment

MATEC Web of Conferences, 2017

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Research paper thumbnail of Probabilistic assessment of ACI 318 minimum thickness requirements for two-way slabs

Australian Journal of Structural Engineering

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Research paper thumbnail of SCE codes and data

This data include all codes and algorithms used by the authors in the optimization presented in t... more This data include all codes and algorithms used by the authors in the optimization presented in the paper

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Research paper thumbnail of Optimization of Seismic Isolation Systems with Viscous Fluid Dampers Using Genetic Algorithms

Proceedings of the 5th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2015), 2015

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Research paper thumbnail of Effect of Drowsiness on Driver Performance and Traffic Safety

2020 Advances in Science and Engineering Technology International Conferences (ASET)

The occurrence of road traffic accidents is subjected to a variety of causes and one of them is d... more The occurrence of road traffic accidents is subjected to a variety of causes and one of them is drowsy driving. The presence of drowsy driving has been a critical contributor to road accidents worldwide. The purpose of this study is to analyze attitudes, behaviors, and opinions associated with fatigued or drowsy driving. The data were collected using a questionnaire-based survey in the United Arab Emirates and were descriptively analyzed. The results of the analysis showed that a wide number of drivers (71 percent) admitted that they drive while fatigued at least once a week. Out of all respondents, 27 percent admitted falling asleep behind the wheel before and 7 percent of them were involved in a crash related to nodding off. Moreover, the results also showed that most of the drivers prefer to either listen to the radio or talk to passengers to reduce drowsiness rather than stop and rest or nap. Overall, there is a need to raise awareness about the risk of drowsy driving since people tend to see other factors to be riskier. Also, this study highlights the necessity to counteract fatigued driving with treatments on-road and more education to the public. More research and crash data analysis are highly recommended to reach a clear conclusion and suggest certain treatments.

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Research paper thumbnail of Prediction of Punching Shear Capacity for Fiber-Reinforced Polymer Concrete Slabs Using Machine Learning

2022 Advances in Science and Engineering Technology International Conferences (ASET)

The punching shear capacity of slab structures is a critical design parameter. The existing speci... more The punching shear capacity of slab structures is a critical design parameter. The existing specifications in the majority of international reinforced concrete design standards for slab punching shear capacity are based on experiments of steel reinforced slabs. For fiber-reinforced polymer concrete slabs in particular, these conventional design methods may be insufficient to effectively estimate their punching shear capacity and the interaction of many influencing variables impacting punching shear capacity. In this study, several linear regression models and machine learning algorithms, namely support vector machine (SVM) models, were applied to predict FRP slabs' punching shear capacity accurately. A dataset of 103 points was gathered from experimental studies in literature and was used to train the models. The performance of each utilized model was assessed based on coefficient of determination (R2), root mean square error (RMSE), and mean absolute error (MAE) of the predicted punching shear capacity. The results demonstrated that the cubic SVM model outperformed all other models used in this study, with an R2 value of 0.95, RMSE of 74.61 kN, and MAE of 49.17 kN. Then, a sensitivity study was conducted, providing valuable insights on the influence of selected variables, namely slab effective depth (d), loading area (A), slab length (L), and concrete compressive strength (fc') on the punching shear capacity of FRP slabs. The results suggested that increasing the concrete compressive strength in FRP concrete slabs is advised at high d values (d > 145 mm), as increasing the fc' is more pronounced at higher slab effective depths. Moreover, a more pronounced effect at d > 145 mm was observed. Increasing the loading area reduces the punching shear capacity to a loading area/effective depth ratio of around 400. Above the ratio 400, increasing loading area increases the punching shear capacity.

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Research paper thumbnail of Concrete-to-concrete shear friction behavior under cyclic loading

E3S Web of Conferences

The main objective of this paper was to study the concrete-to-concrete shear friction behavior un... more The main objective of this paper was to study the concrete-to-concrete shear friction behavior under cyclic loading and different test rates. Eight dynamic push-pull tests were performed on concrete specimens with as-cast surface roughness type applying four different test rates. The test results include the hysteresis loops of the friction force-displacement relations. It is concluded that the dynamic coefficient of friction decreased with the increased test rate. This reduction in the dynamic coefficient of friction should be considered in the design of structural elements under cyclic or dynamic loading.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Evaluation of the energy dissipation capacity of a steel damper

E3S Web of Conferences

This paper demonstrates the evaluation of the energy dissipation capacity of a steel damper made ... more This paper demonstrates the evaluation of the energy dissipation capacity of a steel damper made from mild steel plates through performing a finite element analysis simulating cyclic loading. Results aimed to obtain the damper characteristics incorporated in retrofitting frames to increase their seismic resistance and energy dissipation. The analysis has well captured the damper energy dissipation capacity and the effective stiffness. Results showed that stresses were concentrated on the diaphragm plate since it is the weakest part of the damper and where the failure is expected to occur. Also, the diaphragm plate was the first segment of the damper to yield and enter the plastic ranges.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Design of the base isolation system with artificial neural network models

Proceedings of the 2020 the 4th International Conference on Compute and Data Analysis, 2020

This work presents the application of the artificial neural networks (ANN) for modeling and desig... more This work presents the application of the artificial neural networks (ANN) for modeling and designing Seismic-Isolation (SI) systems consisting of Natural Rubber Bearings and Viscous Fluid Dampers subject to Near-Field (NF) earthquake ground motion. Four lumped-mass stick models representing a realistic five, ten, fifteen, and 20-story base-isolated buildings are used. The key response parameters selected to represent the behavior of SI system are the Damper Force (PDF), Total Maximum Displacement (DTM), the Peak the Top Story Acceleration Ratio (TSAR) of the isolated structure compared to the fixed-base structure and the maximum amplified drift ratio (δmax). Twenty-four NF earthquake records representing two seismic hazard levels are used. The commercial analysis program SAP2000 was used to perform the Time-History Analysis (THA) of the MDOF system (stick model representing a realistic N-story base-isolated building) subject to all 24 records. Different combinations of damping coefficients (c) and damping exponents (ą) are investigated under the 24 earthquake records to develop the database of feasible combinations for the SI system. The total number of considered THA combinations is 751680 and were used for training and testing the neural network. Mathematical models for the key response parameters are established via ANN and produced acceptable results with significantly less computation. The results of this study show that ANN models can be a powerful tool to be included in the design process of Seismic-Isolation (SI) systems, especially at the preliminary stages.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Impact response and endurance of unreinforced masonry walls strengthened with cement-based composites

Structures, 2022

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Numerical investigation on redundancy of bridges with AASHTO I-girders

Bridge Structures, 2021

Bridge safety is one of the most critical concerns among civil engineering fields due to its high... more Bridge safety is one of the most critical concerns among civil engineering fields due to its high importance. The redundancy of bridges was heavily investigated in the literature; however, they were focused on twin girder redundancy cases. Additionally, literatures were scarce in studies that focused on the improvement that should be made to achieve redundancy systems in different AASHTO I-girder types. Thus, this study focused on assessing the additional required number of tendons for different AASHTO I-girder types and spacing between them to achieve the redundancy of I-girder bridges. The additional unbonded tendons are suggested to be added externally or internally. The parameters varied in this study are compressive strength of ultrahigh-performance concrete (UHPC), spacing between girders (i.e. number of girders) and type of girders. Leap Bridge Concrete software was used to simulate the required structural modes. After performing extensive numerical analyses following AASHTO ...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Shear Strengthening of T-Section RC Beams Using Double-Side Externally Bonded CFRP

IOP Conference Series: Materials Science and Engineering, 2020

This paper aims at investigating the effect of S-wrap EB-CFRP to shear-strengthen RC T-beams. The... more This paper aims at investigating the effect of S-wrap EB-CFRP to shear-strengthen RC T-beams. The experimental program included seven 3.3m-span T-beams that were tested under three-point loading. The specimens were divided into two major groups, including four specimens with no steel stirrups (Group 1), and three specimens with steel stirrups at half of the effective depth (d/2) center to center spacing (Group 2). Five of the seven specimens were strengthened in shear using S-wrap EB-CFRP strips used at d/4 and d/2 spacings. The shear capacity, maximum deflection under the applied load, failure mode, and the strain development in the CFRP strips, steel stirrups, and the main tensile reinforcement were reported in this paper. The overall results show that the addition of EB-CFRP strips to T-beams is an effective method of enhancing the shear capacity of T-Beam in the absence of steel stirrups. With the presence of steel stirrups in the T-beams, the contribution of the EB-CFRP strips ...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Normalized shear strength of trapezoidal corrugated steel webs

Journal of Constructional Steel Research, 2017

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Effect of fibers and welded-wire reinforcements on the diaphragm behavior of composite deck slabs

Steel and Composite Structures, 2015

Twelve large-scale composite deck slabs were instrumented and tested in a cantilever diaphragm co... more Twelve large-scale composite deck slabs were instrumented and tested in a cantilever diaphragm configuration to assess the effect of fibers and welded wire mesh (WWM) on the in-plane shear capacity of composite deck slabs. The slabs were constructed with reentrant decking profile and reinforced with different types and dosages of secondary reinforcements: Conventional welded wire mesh (A142 and A98); synthetic macro-fibers (dosages of 3 kg/m 3 and 5.3 kg/m 3 ); and hooked-end steel fibers with a dosage of 15 kg/m 3 . The deck orientation relative to the main beam (strong and weak) was also considered in this study. Fibers and WWM were found efficient in distributing the applied load to the whole matrix, inducing multiple cracking, thereby enhancing the strength and ductility of composite deck slabs. The test results indicate that fibers increased the slab's ultimate in-plane shear capacity by up to 29% and 50% in the strong and weak directions, respectively. WWM increased the ultimate in-plane shear capacity by up to 19% in the strong direction and 9% in the weak direction. The results suggest that discrete fibers can provide comparable diaphragm behavior as that with the conventional WWM.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Effect of material nonlinearity in unidirectional composites on the behavior of beam structures

International Journal of Solids and Structures, 2000

... Barbero et al. (1993) presented a formal engineering approach for the mechanics of thin-walle... more ... Barbero et al. (1993) presented a formal engineering approach for the mechanics of thin-walled laminated beams based ... 2. Objectives. The present study is aimed to investigate the effect of material nonlinearity in unidirectional composites on the behavior of beam structures ...

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