Browsing by Author "Alnahhal, Wael"
Now showing items 1-18 of 18
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Application of Metastructures for Targeted Low-Frequency Vibration Suppression in Plates
Ghachi, Ratiba F.; Mohamed, Ahmed S.; Renno, Jamil; Alnahhal, Wael ( Springer , 2022 , Article)Purpose We present an approach that combines finite element analysis and genetic algorithms to find the optimal configuration of local resonators created in the host structure to suppress their vibration in a target ... -
Application of Metastructures for Targeted Low-Frequency Vibration Suppression in Plates
Ghachi, Ratiba F.; Mohamed, Ahmed S.; Renno, Jamil; Alnahhal, Wael (2022 , Software)In this paper, we present an approach that combines finite element analysis and genetic algorithms to find the optimal configuration of local resonators created in the host structure to suppress their vibration in a target ... -
Behavior of artificially corroded RC beams strengthened with CFRP and hybrid CFRP-GFRP laminates
Ghous Sohail, Muazzam; Wasee, Muhammad; Al Nuaimi, Nasser; Alnahhal, Wael; Hassan, Mohammad K. ( Elsevier , 2022 , Article)Steel corrosion is a major degradation factor for the reinforced concrete (RC) infrastructure and necessitates a costly repair after short service life. Predicting the strength of corroded and retrofitted structural elements ... -
Bond durability of basalt FRP bars to fiber reinforced concrete in a saline environment
Alaa, Taha; Alnahhal, Wael; Alnuaimi, Nasser ( Elsevier , 2020 , Article)This study investigates the influence of basalt fiber reinforced concrete (BFRC) on the bond durability of helically wrapped basalt fiber reinforced polymers (HWBFRP) bars subjected to harsh saline environmental conditions. ... -
Bond Performance of Near-Surface Mounted BFRP Bars to Concrete
Aljidda, Omar; El Refai, Ahmed; Alnahhal, Wael ( Qatar University Press , 2023 , Conference Paper)This paper presents the test results of a study on the bond performance of near-surface mounted (NSM) basalt fiber reinforced polymer (BFRP) bars to concrete. Twelve C-shape concrete specimens were tested under direct ... -
Bond performance of tensile lap-spliced basalt-FRP reinforcement in high-strength concrete beams
Eltantawi, Islam; Alnahhal, Wael; El Refai, Ahmed; Younis, Adel; Alnuaimi, Nasser; Kahraman, Ramazan... more authors ... less authors ( Elsevier , 2022 , Article)This paper investigates the bond between high-strength concrete (HSC) and tensile lap-spliced basalt fiber-reinforced polymer (BFRP) bars. Ten large-scale BFRP-reinforced concrete beams (300 x 450 x 3900 mm) were fabricated ... -
Durability characteristics of high and ultra-high performance concretes
Sohail, Muazzam Ghous; Kahraman, Ramazan; Al Nuaimi, Nasser; Gencturk, Bora; Alnahhal, Wael ( Elsevier , 2021 , Article)Durability characteristics of high-performance concrete (HPC) and ultra-high performance concrete (UHPC) are evaluated in comparison to normal strength concrete (NSC). HPC and UHPC are cast using commonly available materials ... -
Electrochemical behavior of mild and corrosion resistant concrete reinforcing steels
Sohail, Muazzam G.; Kahraman, Ramazan; Alnuaimi, Nasser A.; Gencturk, Bora; Alnahhal, Wael; Dawood, Mina; Belarbi, Abdeldjelil... more authors ... less authors ( Elsevier , 2020 , Article)An experimental study is carried out in this paper to evaluate the corrosion performance of mild steel reinforcing bars (MS), high strength steel reinforcing bars (HS), epoxy-coated steel reinforcing bars (EC), and ... -
Enhancing the Bond Durability of Basalt Fiber Reinforced Polymer Bars Using Basalt-Macro Fiber Reinforced Concrete
Taha, Alaa; Alnahhal, Wael; Al Nuaimi, Nasser ( Qatar University Press , 2023 , Conference Paper)This paper presents a study about the bond durability of basalt fiber reinforced polymers (BFRP) bars embedded in concrete incorporating basalt macro fibers (BMF) when conditioned in harsh saline environment at 60 °C. A ... -
Experimental Investigation on the Flexural Capacity of Reinforced Concrete Beams with Treated Wastewater and Recycled Concrete Aggregates
Abushanab, Abdelrahman; Alnahhal, Wael ( Qatar University Press , 2023 , Conference Paper)Eco-friendly concrete is the most recommended sustainable option to reduce the excessive diminution of concrete natural resources and the high generation of greenhouse gas emissions. Therefore, the present study explores ... -
FAI: Fast, accurate, and intelligent approach and prediction tool for flexural capacity of FRP-RC beams based on super-learner machine learning model
Wakjira, Tadesse G.; Abushanab, Abdelrahman; Ebead, Usama; Alnahhal, Wael ( Elsevier , 2022 , Article)Fiber-reinforced polymer (FRP) composites have recently been considered in the field of structural engineering as one of the best alternatives to conventional steel reinforcement due to their high tensile strength, ... -
Generalized spatial aliasing solution for the dispersion analysis of infinitely periodic multilayered composites using the finite element method
Haque, A. B.M.Tahidul; Ghachi, Ratiba F.; Alnahhal, Wael I.; Aref, Amjad; Shim, Jongmin ( American Society of Mechanical Engineers , 2017 , Article)The finite element (FE) method offers an efficient framework to investigate the evolution of phononic crystals which possess materials or geometric nonlinearity subject to external loading. Despite its superior efficiency, ... -
Parametric study on moment redistribution of fiber reinforced concrete continuous beams with basalt FRP bars
Abushanab, Abdelrahman Hamdi; Alnahhal, Wael I ( Qatar University Press , 2020 , Poster)The state of Qatar is suffering from its harsh environment and coastal conditions which stand for most of the year. As a result, steel-reinforced concrete structures are subjected to rapid corrosion and deterioration. ... -
Parametric study on moment redistribution of fiber reinforced concrete continuous beams with basalt FRP bars
Abushanab, Abdulrahman Hamdi; Alnahhal, Wael I ( Qatar University Press , 2021 , Poster)The state of Qatar bears harsh environment and coastal conditions which stand for most of the year. As a result, steel-reinforced concrete structures are subjected to rapid corrosion and deterioration. Therefore, there is ... -
Performance of Mild Steel and Corrosion-Resistant Steel Rebars in Chloride-Contaminated Concrete
Sohail, Muazzam Ghous; Al Nuaimi, Nasser; Alnahhal, Wael; Kahraman, Ramazan ( Qatar University Press , 2023 , Conference Paper)Reinforced concrete (RC) infrastructure in Arabian Peninsula is subjected to harsh climatic conditions of high temperatures, humidity, and airborne chlorides and there is a high concentration of salts in seawater and soils. ... -
Sensitivity analysis and genetic algorithm-based shear capacity model for basalt FRC one-way slabs reinforced with BFRP bars
Al-Hamrani, Abathar; Wakjira, Tadesse G.; Alnahhal, Wael; Ebead, Usama ( Elsevier , 2023 , Article)Fiber-reinforced polymer (FRP) composites are increasingly used in concrete structures owing to their superior corrosion resistance. However, FRP-reinforced concrete (RC) structures exhibit less ductile response compared ... -
Shear capacity prediction of FRP-RC beams using single and ensenble ExPlainable Machine learning models
Wakjira, Tadesse G.; Al-Hamrani, Abathar; Ebead, Usama; Alnahhal, Wael ( Elsevier , 2022 , Article)Corrosion in steel reinforcement is a central issue behind the severe deterioration of existing reinforced concrete (RC) structures. Nowadays, fiber-reinforced polymer (FRP) is increasingly being used as a viable alternative ... -
The Effect of Surface Treatment of Basalt FRP Bars on the Shear Capacity of Oneway High-Strength Concrete Slabs
Al-Hamrani, Abathar; Alnahhal, Wael ( Qatar University Press , 2023 , Conference Paper)Corrosion is a common condition encountered by steel reinforcing bars which has a considerable negative impact on the structural integrity of concrete structures. Nowadays, applying anti-corrosive composite materials such ...