Abbas A. Allawi

Abbas A. Allawi

University of Baghdad

H-index: 11

Asia-Iraq

About Abbas A. Allawi

Abbas A. Allawi, With an exceptional h-index of 11 and a recent h-index of 10 (since 2020), a distinguished researcher at University of Baghdad, specializes in the field of Structural Engineering \ Bridges Engineering.

His recent articles reflect a diverse array of research interests and contributions to the field:

Finite element analysis of rectangular RC beams strengthened with FRP laminates under pure torsion

Strengthening of continuous reinforced concrete deep beams with large openings using CFRP strips

Strength compensation of deep beams with large web openings using carbon fiber–reinforced polymer sheets

Effect of web stiffeners on the flexural behavior of composite GFRP-concrete beam under impact load

Recycled concrete aggregate for medium-quality structural concrete

Flexural behavior of composite GFRP pultruded I-section beams under static and impact loading

Abbas A. Allawi Information

University

University of Baghdad

Position

/ COLLEGE of ENGINEERING

Citations(all)

327

Citations(since 2020)

281

Cited By

93

hIndex(all)

11

hIndex(since 2020)

10

i10Index(all)

14

i10Index(since 2020)

12

Email

University Profile Page

University of Baghdad

Abbas A. Allawi Skills & Research Interests

Structural Engineering \ Bridges Engineering

Top articles of Abbas A. Allawi

Finite element analysis of rectangular RC beams strengthened with FRP laminates under pure torsion

Authors

Muhanad M Majed,Mohammadreza Tavakkolizadeh,Abbas A Allawi

Journal

Structural Concrete

Published Date

2021/8

Composite materials have attracted wide attention in strengthening of structural members. In this study, the behavior of rectangular reinforced concrete (RC) strengthened with fiber reinforced polymer (FRP) laminates under pure torsion was investigated numerically and validated by existing data from literature. Various practical strengthening configurations were considered and the efficiency of them was illustrated. Concrete damage plasticity constitutive model was used and required parameters was drawn. Good agreement in terms of torque–twist behaviors of RC beams strengthened with FRP laminates before and after cracking was found. Reasonable steel and FRP reinforcement responses as well as crack patterns were achieved and the failure modes of all the specimens were modeled correctly. A parametric study was carried out and parameter such as number of FRP plies, concrete compressive strength …

Strengthening of continuous reinforced concrete deep beams with large openings using CFRP strips

Authors

Mohammed Riyadh Khalaf,Ali Hussein Ali Al-Ahmed,Abbas AbdulMajeed Allawi,Ayman El-Zohairy

Journal

Materials

Published Date

2021/6/6

To accommodate utilities in buildings, different sizes of openings are provided in the web of reinforced concrete deep beams, which cause reductions in the beam strength and stiffness. This paper aims to investigate experimentally and numerically the effectiveness of using carbon fiber reinforced polymer (CFRP) strips, as a strengthening technique, to externally strengthen reinforced concrete continuous deep beams (RCCDBs) with large openings. The experimental work included testing three RCCDBs under five-point bending. A reference specimen was prepared without openings to explore the reductions in strength and stiffness after providing large openings. Openings were created symmetrically at the center of spans of the other specimens to represent 40% of the overall beam depth. Moreover, finite elements (FE) analysis was validated using the experimental results to conduct a parametric study on RCCDBs strengthened with CFRP strips. The results confirmed reductions in the ultimate load by 21% and 7% for the un-strengthened and strengthened specimens, respectively, due to the large openings. Although the large openings caused reductions in capacities, the CFRP strips limited the deterioration by enhancing the specimen capacity by 17% relative to the un-strengthened one.

Strength compensation of deep beams with large web openings using carbon fiber–reinforced polymer sheets

Authors

Abbas A Allawi,Nazar K Oukaili,Waleed A Jasim

Journal

Advances in Structural Engineering

Published Date

2021/1

This article presents the results of an experimental investigation of using carbon fiber–reinforced polymer sheets to enhance the behavior of reinforced concrete deep beams with large web openings in shear spans. A set of 18 specimens were fabricated and tested up to a failure to evaluate the structural performance in terms of cracking, deformation, and load-carrying capacity. All tested specimens were with 1500-mm length, 500-mm cross-sectional deep, and 150-mm wide. Parameters that studied were opening size, opening location, and the strengthening factor. Two deep beams were implemented as control specimens without opening and without strengthening. Eight deep beams were fabricated with openings but without strengthening, while the other eight deep beams were with openings in shear spans and with carbon fiber–reinforced polymer sheet strengthening around opening zones. The opening size …

Effect of web stiffeners on the flexural behavior of composite GFRP-concrete beam under impact load

Authors

Safaa I Ali,Abbas A Allawi

Journal

Journal of Engineering

Published Date

2021/3/1

In this paper, numerical and experimental studies on the elastic behavior of glass fiber reinforced polymer (GFRP) with stiffeners in the GFRP section's web (to prevent local buckling) are presented. The GFRP profiles were connected to the concrete deck slab by shear connectors. Two full-scale simply supported composite beams (with and without stiffeners) were tested under impact load (three-point load) to assess its structural response. The results proved that the maximum impact force, maximum deflection, damping time, and damping ratio of the composite beam were affected by the GFRP stiffeners. The experimental results indicated that the damping ratio and deflection were diminished compared to hybrid beam without stiffeners by 16% and 22%, respectively, and increasing damping time by 26%. Finite element models were used to study pre-failure behavior. The numerical modeling results showed good agreement with experimental data in terms of loading path and final load. The damping ratio and midspan deflection values were greater than the experimental values by 6% and 12%, respectively.

Recycled concrete aggregate for medium-quality structural concrete

Authors

Dong Viet Phuong Tran,Abbas Allawi,Amjad Albayati,Thi Nguyen Cao,Ayman El-Zohairy,Yen Thi Hai Nguyen

Journal

Materials

Published Date

2021/8/17

This paper reports an evaluation of the properties of medium-quality concrete incorporating recycled coarse aggregate (RCA). Concrete specimens were prepared with various percentages of the RCA (25%, 50%, 75%, and 100%). The workability, mechanical properties, and durability in terms of abrasion of cured concrete were examined at different ages. The results reveal insignificant differences between the recycled concrete (RC) and reference concrete in terms of the mechanical and durability-related measurements. Meanwhile, the workability of the RC reduced vastly since the replacement of the RCA reached 75% and 100%. The ultrasound pulse velocity (UPV) results greatly depend on the porosity of concrete and the RC exhibited higher porosity than that of the reference concrete, particularly at the transition zone between the RCA and the new paste. Therefore, the sound transmission in the RC required longer times than that in the reference concrete. Moreover, a predictive equation relating the compressive strength to the UPV was developed.

Flexural behavior of composite GFRP pultruded I-section beams under static and impact loading

Authors

Abbas A Allawi,Safaa I Ali

Journal

Civ. Eng. J

Published Date

2020/11/1

In this study, the effect of glass fiber reinforced polymer (GFRP) section and compressive strength of concrete in composite beams under static and low velocity impact loads was examined. Modeling was performed and the obtained results were compared with the test results and their compatibility was evaluated.‎ Experimental tests of four composite beams were carried out, where two of them are control specimen with 20 MPa compressive strength of concrete deck slab and 50 MPa for other. Bending characteristics were affected by the strength of concrete under impact loading case, as it increased maximum impact force and damping time at a ratio of 59% and reduced the damping ratio by 47% compared to the reference hybrid beam. Under static loading, there was an increase in all the parameters, including the maximum load, ductility, and stiffness. Mid-span deflection was reduced by 25% under static and impact loads. A finite element analysis was performed by using the ABAQUS software. The midspan deflection value was greater than the experimental values by 6% and 3% for impact and static loads, respectively, and all other results showed a high rate of agreement with the obtained test results. The agreement between the numerical and experimental results indicates that the developed numerical model is capable of analyzing the impact and static behavior of such hybrid GFRP-concrete system.

See List of Professors in Abbas A. Allawi University(University of Baghdad)

Abbas A. Allawi FAQs

What is Abbas A. Allawi's h-index at University of Baghdad?

The h-index of Abbas A. Allawi has been 10 since 2020 and 11 in total.

What are Abbas A. Allawi's top articles?

The articles with the titles of

Finite element analysis of rectangular RC beams strengthened with FRP laminates under pure torsion

Strengthening of continuous reinforced concrete deep beams with large openings using CFRP strips

Strength compensation of deep beams with large web openings using carbon fiber–reinforced polymer sheets

Effect of web stiffeners on the flexural behavior of composite GFRP-concrete beam under impact load

Recycled concrete aggregate for medium-quality structural concrete

Flexural behavior of composite GFRP pultruded I-section beams under static and impact loading

are the top articles of Abbas A. Allawi at University of Baghdad.

What are Abbas A. Allawi's research interests?

The research interests of Abbas A. Allawi are: Structural Engineering \ Bridges Engineering

What is Abbas A. Allawi's total number of citations?

Abbas A. Allawi has 327 citations in total.

What are the co-authors of Abbas A. Allawi?

The co-authors of Abbas A. Allawi are AMJAD HAMAD KHALIL ALBAYATI, Nazar K. Ali Oukaili, Mohannad H. Al-Sherrawi, Prof. Dr. AbdulMuttalib I. Said, Asst. Prof. Dr. Abeer Aqeel Majeed Al-Musawi, Dr. Ali Hussein Ali Al-Ahmed.

    Co-Authors

    H-index: 13
    AMJAD HAMAD KHALIL ALBAYATI

    AMJAD HAMAD KHALIL ALBAYATI

    University of Baghdad

    H-index: 11
    Nazar K. Ali Oukaili

    Nazar K. Ali Oukaili

    University of Baghdad

    H-index: 10
    Mohannad H. Al-Sherrawi

    Mohannad H. Al-Sherrawi

    University of Baghdad

    H-index: 8
    Prof. Dr. AbdulMuttalib I. Said

    Prof. Dr. AbdulMuttalib I. Said

    University of Baghdad

    H-index: 8
    Asst. Prof. Dr. Abeer Aqeel Majeed Al-Musawi

    Asst. Prof. Dr. Abeer Aqeel Majeed Al-Musawi

    University of Baghdad

    H-index: 7
    Dr. Ali Hussein Ali Al-Ahmed

    Dr. Ali Hussein Ali Al-Ahmed

    University of Baghdad

    academic-engine

    Useful Links