Abbas Haraj Mohammed

Abbas Haraj Mohammed

University of Diyala

H-index: 10

Asia-Iraq

About Abbas Haraj Mohammed

Abbas Haraj Mohammed, With an exceptional h-index of 10 and a recent h-index of 10 (since 2020), a distinguished researcher at University of Diyala, specializes in the field of Civil Engineering.

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

Finite element modelling of hollow flange steel plate girders under flexural loading

Evaluation results of shear strength parameters of soil at different soil laboratories

Finite element analysis of hollow flange steel girders with web openings

Effect of pile spacing on penetration process of pile group in gypseous soil

Experimental investigation of pull-out test of different reinforcing bar embedded in fiber concrete blocks

Finite Element Investigation of the Ultimate Capacity of Hollow-Flange Steel Girders with Web Openings

Punching Shear Characterization of Steel Fiber-Reinforced Concrete Flat Slabs

Effect of Different Proportions of Fly Ash and GGBFS on the Compressive Strength of Geopolymer Mortar.

Abbas Haraj Mohammed Information

University

University of Diyala

Position

___

Citations(all)

326

Citations(since 2020)

303

Cited By

124

hIndex(all)

10

hIndex(since 2020)

10

i10Index(all)

12

i10Index(since 2020)

11

Email

University Profile Page

University of Diyala

Abbas Haraj Mohammed Skills & Research Interests

Civil Engineering

Top articles of Abbas Haraj Mohammed

Finite element modelling of hollow flange steel plate girders under flexural loading

Authors

Usamah M. Salih,Abbas H. Mohammed,Kamaran S. Abdullah,Hassan O. Abbas

Published Date

2023/9/1

The objective of structural design is to choose member sizes that are proportional to the whole structural geometry in order to achieve the most cost-effective design. Steel girders, which were typically made of webs, flanges and a number of internal diaphragms, were used in many fields, including bridge engineering. The main goal of this research is to develop finite element model to study the flexural behavior of hollow flange steel plate girders with various cross sections. The non-linear finite element analysis program was used to study the flexural behavior of girders. Four models are analyzed which are hollow flanges steel plate girder without stiffeners, hollow flanges steel plate girder with stiffeners, upper hollow flange steel plate girder and lower hollow flange steel plate girder. The result obtained from finite element analysis showed that the failure load in hollow flanges steel plate girder with stiffeners …

Evaluation results of shear strength parameters of soil at different soil laboratories

Authors

Waad A. Zakaria,Hassan O. Abbas,Abbas H. Mohammed

Journal

AIP Conference Proceedings

Published Date

2023/7/19

The accuracy of obtaining strength parameters of soil is considered a major role for any soil engineer seeking for accurate design. The overestimation or underestimation of such parameters will no doubt leads to a dangerous or exaggerated foundation design or any design related to soil parameters. In both cases no firm soil agency will approve such sequences. The accuracy of soil tests, and in precise, the laboratory testing is by far important the most for soil design. In this research an attempt is followed to make an accuracy study on a randomly chosen three Iraqi soil laboratories. As such, two soil samples were chosen from two different locations in Baquba discrete. One soil is a CL clay and the other is a SW-SC sand. Each specimen of soil is tested by authors carefully five times, unconfined compression test for the clay and direct shear box test for the sand, as to get cohesion for soil 1 and friction angle for soil 2 …

Finite element analysis of hollow flange steel girders with web openings

Authors

A. H. Mohammed,U. M. Salih,K. S. Abdullah,H. O. Abbas

Journal

AIP Conference Proceedings

Published Date

2023/7/15

The Hollow Flange Steel Girders have been used generally in different engineering constructions, which are commonly made-up by connecting two plate flanges, a series of longitudinal or transverse stiffeners and a flat web together. Eccentric web openings are usually unavoidable in the maximum shear panels of girders used in bridge construction and offshore. The purpose of this paper is to develop a finite element model for the analysis of hollow flange steel girders with web openings. Finite element ANSYS software are used in the numerical analysis and was carried out on hollow flange steel girder chosen from literature. A parametric study was conducted to study the effect of openings on the behavior of hollow flange steel girders. Three square openings with 50* 50 mm dimension and three circle openings with 25 mm radius are considered. Results show that the ultimate moment capacity for the hollow …

Effect of pile spacing on penetration process of pile group in gypseous soil

Authors

B. J. Noman,H. O. Abbas,A. H. Mohammed

Published Date

2023/9/1

In fact, gypseous soil is one of the most common types of collapsible soil. It has the ability to resist high stress and settlement in a dry state, but it loses these properties quickly when exposed to water, causing a relatively large decrease in soil volume. It occupies more than 30% of the total surface area of Iraq. The use of piles has frequently appeared in such soils because they penetrate the collapsible soil layer to reach a harder layer or rock. This paper aims to study the influence of pile spacing on penetration resistance of displacement pile as well as their impact on soil dilatation. A pile group can be modeled by a group of four piles. Close end piles with a diameter of 1.5 mm, a cone tip angle of 60, and a length to diameter (L/D) ratio of 20 were used. The test was carried out under an axial load in a dry state in medium-dense soil having a gypsum content of 30%. The effect of parameters, such as the pileto-pile …

Experimental investigation of pull-out test of different reinforcing bar embedded in fiber concrete blocks

Authors

Abbas H Mohammed,Kamaran S Abdullah,Usamah M Salih,Hassan O Abbas,Hutheifa J Khalifa

Journal

AIP Conference Proceedings

Published Date

2023/9/1

The pull-out tests the reinforcing bar embedded in the concrete block is the most used test method for measuring the bond strength between the reinforcing bars and the concrete. Steel fiber improved the mechanical characteristics of fiber-reinforced concrete compared to plain concrete, such as ductility, flexural strength, tensile strength and flexural toughness. This paper presents experimental pull-out test on six concrete specimens. Two parameters are considered in this study which are the content of steel fiber and steel bar diameter. There are three reinforcing bar diameters are considered in this work which are 16, 12, and 10 mm. The steel fiber content 0.05% of concrete volume is considered in this study. Test results show that the steel fibers had important effect on the increase of the pull-out force. The pull-out force increased by 28% for concrete block with steel fibers compared with concrete block without steel …

Finite Element Investigation of the Ultimate Capacity of Hollow-Flange Steel Girders with Web Openings

Authors

Usamah M Salih,Abbas Haraj Mohammed,Marwa Z Kareem,Kamaran S Abdullah

Journal

Diyala Journal of Engineering Sciences

Published Date

2022/6/1

The goal of structural design is to select member sizes that are proportional to the structural geometry in order to achieve the most cost-effective design. Steel girders were typically made of webs, flanges and a number of internal stuffeners, the main objective of this research is to develop a finite element model to study the effect of the shapes and locations of openings on the behavior of hollow flange steel plate girders. In this study, seven models were analyzed in two groups. The first group study the effect of web openings shape openings on the behavior of hollow flange steel plate girders, while the second group study the effect of web openings location on the behavior of hollow flange steel plate girders. The girders are analyzed until the final failure has occurred. The results obtained from finite element analysis showed that that the absence of opening had an important effect on the ultimate load capacity. The ultimate capacity of hollow flange steel plate girder with four squares opening decreased about 5% compared to hollow flanges steel plate girder without openings.

Punching Shear Characterization of Steel Fiber-Reinforced Concrete Flat Slabs

Authors

Abbas H Mohammed,Huda M Mubarak,Ali K Hussein,Taymour Z Abulghafour,Dia Eddin Nassani

Journal

HighTech and Innovation Journal

Published Date

2022/12/1

Punching shear failure in thin slabs under concentrated loads can cause shear stresses near columns. The use of steel fiber is a practical way to improve a slab-column connection's punching strength and deformation capacity. In this study, the capacity and behavior of steel fiber-reinforced concrete flat slabs are examined under punching shear force. Ten small-scale flat slabs were tested, eight of which had steel fiber and two without. Two parameters are studied in this paper, which are the fiber volume ratio (from 0% to 2%) and the stub column load shape (circle and square). The test results include the concrete compressive strength, crack patterns, punching shear, and load-defection behavior of the slabs. Based on the experimental results, it was found that the punching shear capacity of slabs with steel fiber (S5) increased by 21.8% compared to slabs without steel fiber (S1), and the slabs with steel fiber had more ductility compared to the slabs without fiber.

Effect of Different Proportions of Fly Ash and GGBFS on the Compressive Strength of Geopolymer Mortar.

Authors

Safie M Oleiwi,Jinan L Abbas,Yahyia M Hameed,Abbas H Mohammed,Ali K Hussein

Journal

Annales de Chimie Science des Materiaux

Published Date

2022/10/1

Nowadays, geopolymer plays a significant role in developing eco-friendly materials to avoid the pollution caused by the Portland cement industry. Geopolymer is a developed industrial by-product-based alternative concrete binder. The aim of this study to evaluate the effect of different proportions of Fly Ash (FA) and Ground Granulated Blast Furnace Slag (GGBFS) on the strength properties of geopolymer mortar. In this study, GGBFS was added as 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, and 100% of the total binder with NaOH concentrations 12 M and sodium silicate to sodium hydroxide ratio 2.5. The compressive strength was investigated experimentally in this study. The combination of FA and GGBFS were tested in a total of eleven geopolymer mix mortars, and the results show that combining the above constituents at 70℃ improves the compressive strength of geopolymer mortar. The result show that …

A review of studies on the post-tensioned concrete beams

Authors

Taha K Mohammedali,Kamaran S Abdullah,Abbas H Mohammed,Raad D Khalaf,Ali K Hussin

Published Date

2021/10/11

Post-tensioned method is a technique commonly used all over the world to prevent cracks and minimize deflections produced by externally applied loads. In post-tensioned, stress is added after concrete placement and appropriate hardness and strength are achieved. By a post-tensioned method greater loads, greater spans, control the cracks and smaller size of members can be achieved. This paper reviews some previous research studies on post-tensioned concrete beams. From this literature; it was concluded that the ultimate load capacity for a beam with a bonded tendon is higher if compared to the same beam with the unbonded tendon. The higher ultimate capacity for the bonded beam is due to the additive stiffness obtained by tendon-concrete bond. For external prestressed beam, the results showed that using draped tendon profile increases the flexural resistance as compared to straight tendon profile..

Finite Element Model for the Optimization of Steel I-Beam with Variable Depth

Authors

TK Mohammedali,AH Mohammed,RD Khalaf,S Sh Sammen

Journal

IOP Conference Series: Materials Science and Engineering

Published Date

2021/2/1

The objective of structural design is to select member sizes with the optimal proportioning of the overall structural geometry. Conventional steel I-beam with variable depth have been used widely in various engineering fields. The objective of this study is to develop a three-dimensional finite element model for the total volume of steel I-beam with variable depth. The finite element software package ANSYS was used to determine the optimum total volume for the steel I-beam with variable depth. The purpose of the study is to minimize the total volume of the steel beam. The design variables are the height of the steel beam at support, the flanges width, the thickness of flanges, the height of the steel beam at mid-span, and the web thickness. The constraints considered in this study are the normal stress in steel beam and the mid-span displacement of the steel beam. Optimization results of steel beam indicate that the …

Experimental study of reinforced concrete beams with elliptical opening under flexural loading

Authors

Qutaiba G Majeed,QW Ahmed,Alyaa H Mohammed,Saad Sh Sammen

Journal

IOP Conference Series: Materials Science and Engineering

Published Date

2020/7/1

The existing of openings in the structural elements of concrete may be useful in some cases and necessary at other cases. Experimental study on Reinforced Concrete (RC) beams was address in this research to examine the conduct of the opening in RC beams. The target of this study is to evaluate the impact of web elliptical openings in reinforced concrete beams experimentally. Under two-point top loading, four reinforced beams were tested, three of them with openings and one without opening. Test variable included the number of elliptical openings. Test results indicated that incase of the number of opening increased the ultimate load decreased. The ultimate load of CBEH1, CBEH2 and CBEH3 beams are decreased by 12%, 24% and 28% respectively compared with the ultimate load of CB beam.

Optimization of Steel Trapezoidal Box-Girders Using Genetic Algorithm

Authors

Abbas H Mohammed

Journal

IOP Conference Series: Materials Science and Engineering

Published Date

2020/11/1

The goal of the structural design is to select sizes of member with an optimum proportion of the overall structural geometry in order to achieve the lowest initial cost design. Traditional steel box-girders, generally made of two plate flanges, two webs and a number of internal diaphragms, were used in many different fields, such as the structural, architectonical and bridge engineering industries. This study aims to establish a three-dimensional finite element model to minimize the total volume of a steel trapezoidal box-girders. The finite element ANSYS program package was used to determine the optimum total volume of the steel trapezoidal box-girder. ANSYS program has been coupled to MATLAB software. The genetic algorithm method of optimization is considered. In this analysis, the objective function is the total volume minimization. The design variables are the top flange width, bottom flange width, top flange …

Analytical Study on Effect of Bar Size on Pull-out force for Reinforcing Bar Embedded in Concrete Blocks

Authors

Abbas H Mohammed,Taha K Mohammedali,Saad Sh Sammen

Journal

IOP Conference Series: Materials Science and Engineering

Published Date

2020/11/1

The most commonly used test method for measuring the bond strength between reinforcing bars and concrete is the pull-out test of pulling a reinforcing bar out of a concrete block. During serviceability and durability design the bond of reinforcing bars is important in crack control. This paper presents numerical model for studying the size effect on pull-out force. This research considers three bar size diameter, which is 10, 12 and 16 mm bar diameter. The finite element ANSYS software was used for the numerical analysis. The specimens are analyzed until the specimens failure were occurred. The analytical results indicate that the pull-out force increase with increasing bar diameter. The pullout force for specimens S12 and S16 are increase (7% and 35%) compared with specimen S10 respectively.

See List of Professors in Abbas Haraj Mohammed University(University of Diyala)

Abbas Haraj Mohammed FAQs

What is Abbas Haraj Mohammed's h-index at University of Diyala?

The h-index of Abbas Haraj Mohammed has been 10 since 2020 and 10 in total.

What are Abbas Haraj Mohammed's top articles?

The articles with the titles of

Finite element modelling of hollow flange steel plate girders under flexural loading

Evaluation results of shear strength parameters of soil at different soil laboratories

Finite element analysis of hollow flange steel girders with web openings

Effect of pile spacing on penetration process of pile group in gypseous soil

Experimental investigation of pull-out test of different reinforcing bar embedded in fiber concrete blocks

Finite Element Investigation of the Ultimate Capacity of Hollow-Flange Steel Girders with Web Openings

Punching Shear Characterization of Steel Fiber-Reinforced Concrete Flat Slabs

Effect of Different Proportions of Fly Ash and GGBFS on the Compressive Strength of Geopolymer Mortar.

...

are the top articles of Abbas Haraj Mohammed at University of Diyala.

What are Abbas Haraj Mohammed's research interests?

The research interests of Abbas Haraj Mohammed are: Civil Engineering

What is Abbas Haraj Mohammed's total number of citations?

Abbas Haraj Mohammed has 326 citations in total.

What are the co-authors of Abbas Haraj Mohammed?

The co-authors of Abbas Haraj Mohammed are Khattab Saleem Abdul-Razzaq; Abdul-Razzaq K. S.; Khattab S. Abdul-Razzaq; Abdul-Razzaq KS; Abdul, Dia Eddin Nassani.

    Co-Authors

    H-index: 17
    Khattab Saleem Abdul-Razzaq; Abdul-Razzaq K. S.; Khattab S. Abdul-Razzaq; Abdul-Razzaq KS; Abdul

    Khattab Saleem Abdul-Razzaq; Abdul-Razzaq K. S.; Khattab S. Abdul-Razzaq; Abdul-Razzaq KS; Abdul

    University of Diyala

    H-index: 12
    Dia Eddin Nassani

    Dia Eddin Nassani

    Hasan Kalyoncu Üniversitesi

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