Research Article:

Mazen D.Abdulah*
Civil Engineering , College of Engineering ,University of Basra

Email address:  mazend081@gmail.com

ABSTRACT

The problem of this study is that the building of foundation by stones at the
present time leads to develop cracks in the superstructure. Therefore, the
solutions and the right manner were suggested for building the stone in the
small and big structures. This paper studies using and properties of stones in
building of foundations, that the stone is rigid and stiff in the same time very
cheap for building, especially in the regions wealthy with stone. The models
were taken for analyzing, firstly experimentally in the field site and secondly
by Plaxis Program using the Finite Elements with the same properties of the
soil and calculate the vertical displacement, vertical strain, factor of safety and
bearing capacity. It can be concluded that the using of the reinforced columns
in the small foundation in addition to the beam and stones will reduce the
vertical displacement and strain to lower values, maintain high value of bearing
capacity and increase the factor of safety that makes the structure becomes
safer. Also for the big structures like bridges another models were used with
higher loadings and the same above parameters were calculated, the stone with
special requirements approved to improve and treat the soil parameters even
for the big structures.

Keywords: LWC:-light weight concrete, NWC:- normalstrength concrete, HSC:- heig strength concrete , w/c:-water to cement ratio 

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Research Article:

Hussein Yousif Aziz
Civil Engineering, College of Engineering, Al-Muthanna University

Email address:  husseinyousif3@hotmail.com

ABSTRACT

The problem of this study is that the building of foundation by stones at the
present time leads to develop cracks in the superstructure. Therefore, the
solutions and the right manner were suggested for building the stone in the
small and big structures. This paper studies using and properties of stones in
building of foundations, that the stone is rigid and stiff in the same time very
cheap for building, especially in the regions wealthy with stone. The models
were taken for analyzing, firstly experimentally in the field site and secondly
by Plaxis Program using the Finite Elements with the same properties of the
soil and calculate the vertical displacement, vertical strain, factor of safety and
bearing capacity. It can be concluded that the using of the reinforced columns
in the small foundation in addition to the beam and stones will reduce the
vertical displacement and strain to lower values, maintain high value of bearing
capacity and increase the factor of safety that makes the structure becomes
safer. Also for the big structures like bridges another models were used with
higher loadings and the same above parameters were calculated, the stone with
special requirements approved to improve and treat the soil parameters even
for the big structures.

Keywords: Rock Mechanics; Foundation Engineering; Bearing Capacity; Plaxis Program 

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Research Article:

عمار رزاق حسن
قسم هندسة المواد/كلية الهندسة/جامعة الكوفة

Email address: ammarr.alshemary@uokufa.edu.iq

ABSTRACT

In this research was conducted thermal coating process to follow flame spray
technology through the use of gaseous mixture consisting of oxygen and acetylene
for the purpose of obtaining the surface layer of nickel plating – Aluminum
(metco450) on the surface of medium carbon steel type (AISI 1050). Provide an
increase in the mechanical properties of the surface of the metal guide and
compensate for the missing parts of the surface as a result of the process of wear
and tear. Was conducted in three successive phases, first phase involved the
preparation of models and to create the basis for this surface models as well as the
preparation of powder coating and analyze the chemical components of the
models and powder coating. While the second phase involved the implementation
of the coating process (nickel – aluminum) using a flame spray coating process
was carried out in different ways for each model through a change in the granular
size of the powder coating. The third phase of the research included the testing of
standard tests check adhesion, examination of roughness, check the wear and tear
and check the hardness of the coating as well as microscopic examination of the
paint and the surface layer basis. Where results showed that increasing the size
particleboard from (25μm) to (75μm) led to increased wear rate and a decrease in
adhesion coating layer, as noted increased roughness layer coatings increase size
particleboard for powder coating, also led to increase size particleboard for
powder coating to a decrease in hardness layer paint.

Keywords:flame spraying, coating nickel- aluminum, medium carbon steel, particle size

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Research Article:

Muslim A. k. AL-Kannoon
Department of Civil Engineering, College of Engineering, Kufa University.

ABSTRACT

This investigation aims to improve the stress-strain behavior and mechanical properties of
lightweight concrete in order to use it in structural members. Special type of lightweight concrete was
produced in this study prepared by mixing Ordinary Portland Cement(OPC type I) and white gravel
of low specific gravity, sand with very low percentage of 10% from gravel weight, and w/c ranged
from 0.42 to 0.46 , silica fume added as percentage from cement weight and STYRENE
BUTADIENE RUBBER (SBR) was added also in different percentages(5%, 10% and 15%). The
main mixes 1:5 (cement: gravel) and 1:4 were used in this study. The tests in this research include
stress- strain tests for both ascending and descending portions, compressive strength test, tensile
strength test, flexural strength test and density of specimens. The most significance effect done by
adding 15% SBR resin and gives (110%) increment in compressive strength for 1:4 mixes and ( 142
%) increment for1:5 mixes. For mixes 1:5 and by adding 15% SBR, the tensile strength increased
100%, flexural strength increased also 62% and density of specimens increased 8.2% , but more
significant effect is seen for mixes 1:4, the increased in tensile and flexural strength and density of
specimens were 138%, 109% and 7.71% respectively. The values of modulus of elasticity increased
also compared with reference mixes and have excellent values ,by adding 15%SBR the increment
was ( 58 %) for 1:4 mixes, and ( 150 %) increment for 1:5 mixes, that increments are very important
to reduce the deflection in concrete members such as slabs and beams, therefore, like this polymer
concrete can be used as structural members

Keywords: stress-strain behavior, compressive strength, flexural strength, modulus of elasticity, lightweight concrete , polymer concrete, SBR.

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The Adjacent Conceptions Effect on Creativity According to Detailed Path for Creation Process

Research Article:

Basim Hasan Al-Majedia , Ahmed Hashim H. El-Eqapy
Arch. Engineering. Department , University of Technology 

ABSTRACT

The Contemporary narratives focused on the study of the architectural
design process of general framework of an understanding of the
important elements of the path of the process and ended to focus on the
concept of innovation as a concept overarching all the bases underlying
innovation in the process illustrates the design in architecture, hence the
need arose to study the impact of the rest of the concepts adjacent it to
strengthen and assigning creative path in general and its role in
influencing the detailed stages of cost in particular.
This paper goals are of defining general principles of the conceptions
creativity and the importance of theory in architecture and classification
stages of cost in addition to the display of vocabulary and concepts
important adjacent and influential in the course design and productive to
know the research problem is not so obvious effect of (check) concepts
Utility (adjacent) in track design creative in Architecture the aim is to
clarify the above and down to form a theoretical framework is
Knowledge clear indications of what has been applied to the product of
an architect specializing in order to explore the impact of these indicators
achieved the objective of the research and then head to put the final
conclusions and recommendations.

Keywords: creative, consciousness, cognition, perceptual, thought 

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Hydraulic Model Development using HEC-RAS and Determination of Manning Roughness Value for Shatt Al-Rumaith

Research Article:

Ameera Mohamad Awad*
Department of Civil Engineering , College of Engineering , University of Al- Muthanna.

E-mail addresses: hudamohammad20@gmail.com

ABSTRACT

Selection of appropriate Manning’s coefficient is critical to the accuracy of
computed water surface profiles. Moreover , estimation of channel
roughness parameter is of key importance in the study of open- channel flow
particularly in hydraulic modeling .Hence, it is essential to calibrate the
channel roughness coefficient for open channel whether natural or artificial .
In the present study , it is attempted to calibrate the value of Mannnig’s “n”
coefficient by comparing the computed water surface profiles with observed
one , using HEC-RAS steady flow model for shatt al-Rumaith channel in AlMuthanna (Iraq ) . For this calibration , the flows for the year 2014 has been
considered . It is found that the value of Manning’s roughness coefficient for
shatt al-Rumaith shows a good agreement between the computed with
observed water surface profiles , is n=0.023and n= 0.04 for main channel
and floodplain respectively

Keywords:Manning’s Roughness coefficient , HEC-RAS model ,Calibration , water surface profiles, shatt Al-Rumaith

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Investigation of Noise Levels Within Al-Muthanna University in AlMuthanna Province Iraq

Research Article:

Huda Mohammed Selman*
Civil Engineering Department, College of Engineering, University of Al- Muthanna

E-mail addresses: hudamohammad20@gmail.com

ABSTRACT

Noise pollution around the Al-Muthanna university in Al-Samawah city
was measured to study the effects on the teaching-learning processes and
performance of both teachers and students during November and December
2014. Digital Sound Level Meter (model a GM1351 ) was used to measure
the noise level, In twelve selected buildings for the study as indoor sites and
the park and main door of the university as outdoor sites . The
measurements at the buildings were carried out in three different time
intervals of the day i.e. in the morning 8:00-10:00am, 10:00-12:00 pm and
12:00-2:00 pm. Noise intensity was also measured in two points at an
interval of half hour .After recording of daily measurements of noise level,
the hourly average noise level for each point of the building and for the
whole buildings were calculated. As well as the total average of noise levels
was calculated in order to compare it with the allowable limits of EPA for
educational institutions. The maximum noise level was found in college of
education (81.8) dBl and the minimum value in college of nursing which
was equal(73.3) dBl. The study results show that the rate of noise level in an
indoor and outdoor sites is very high and not suitable for teaching-learning
processes. Therefore Acts and regulations concerning noise pollution should
be strictly adopted.

Keywords: Noise pollution, Noise level meter , University campus.

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PERFORMANCE ANALYSIS OF H-SHAPE MULTI-BAND WITH RECTANGULAR PATCH MICRO STRIP ANTENNA

Research Article:

Ahmed Ghanim Wadday
College of Electrical and Electronic Engineering Techniques

E-mail addresses:  ahmadghw@hotmail.com

ABSTRACT

This paper introduces the design of rectangular multi-band H-shaped microstrip
antenna with rectangular slot (RMSA). A special H-structure with constant substrate
thickness was simulated for the proposed antenna, and the effects of different stub sizes on
rectangular patch antenna performance were investigated. A balanced patch antenna has
been designed and analyzed at frequencies of (1 to 6.5 GHz). COMSOL Multiphysics
program was used for the simulation. The resonant frequencies and radiation characteristics
were analysed. Different frequencies used for Radio Frequency Identification RFID,
Worldwide Interoperability for Microwave Access (Wimax) and computer network
applications were tackled.

Keywords:  COMSOL, Muti-band, micro strip antenna, resonant frequency

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STRUCTURAL BEHAVIOR OF SELF COMPACTING CONCRETE

Research Article:

Jamal Abdul-Samad Khudair, Aqeel Hatem Chkheiwer
Civil Engineering Department, Engineering College, Basrah University, Iraq

E-mail addresses: aqeelcivil@yahoo.com

ABSTRACT

This study investigated the influence of type of concrete (self compacting concrete
(SCC) and normal concrete( NC)) and compressive strength (30, 50 and 62 MPa) on the
flexural and shear behavior of reinforced concrete beams, as well as punching shear of
slabs.To achieve these targets, 18 beams and 6 slabs are equipped, tested and assessed. The
tested beams were divided into threegroups, the first group consists of six beams failed in
flexure, the second group contains six beams without web reinforcement failed in shear with
shear span/depth ratios of 3(slender beams), the third group consists of six beams without
web reinforcement failed in shear with shear span/depth ratio of 1 (deep beams), each group
consisted of three SCC and three NC geometrically similar rectangular beams of different
concrete strengths. Test results indicated that, for beams failing in flexure, SCC beams
showed similar ultimate load to NC beams. For slender beams failing inshear, the ultimate
load for beams with fc‘ of about 32 and 48 MPa, NC beams showed 6.75 % higher ultimate
load compared with SCC beams, but beams with fc‘ of about 62 MPa, SCC and NC beams
showed almost the same ultimate load value.For deep beams, no considerable difference in
ultimate loads for SCCand NC beams was noticed. For the six geometrically similar slabs
(three slabs made with SCC and three slabs made with NC of different concrete strengths)
which were designed to fail in punching shear, it was found that, SCC slabs exhibited 17.25
% higher ultimate punching shear load than NC slabs.

Keywords: self-compacting concrete, structural behavior, flexure , shear ,punching shear

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PUNCHING SHEAR RESISTANCE OF LIGHTWEIGHT CONCRETE TWO WAY SLABS STRENGTHENED WITH CFRP STRIPS

Research Article:

Mazen D.Abdulah
University of Basra/ Collage of Engineering ,Department of Civil Engineering

E-mail addresses:  mazend_81@yahoo.com

ABSTRACT

Keywords: CFRP, SOLID 65

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ASSESSMENT OF NATURAL RADIOACTIVITY LEVELS AND RADIATION HAZARDS FOR BUILDING MATERIALS USED IN SOME SELECTED PROVINCES IN IRAQ

Research Article:

Raid R. Al-Omari

Civil Engineering Department, Al-Nahrain University, Baghdad, IRAQ,

Hussein Mandeel Ashour 

Civil Engineering Department, Al-Muthanna University, Samawa, IRAQ

Basim Jabbar Abbas
Civil Engineering Department, Al-Muthanna University, Samawa, IRAQ

E-mail addresses:  tosharaid@yahoo.com, alkhuzaie@yahoo.co.uk and basm.jabar@yahoo.com

ABSTRACT

This paper investigates the effect of soil-pile cap interaction on the dynamic behavior of the
soil-pile system under vibrations. Vertical vibration tests were conducted using experimental
models of pile footings embedded in a finite dry sand layer. The pile footings consist of two
groups of circular piles with spacing/diameter (S/d) ratio equals to 5; the length/diameter
(L/d) ratio for first group was 13.3 and for the second was 20. Each group includes models
with different number of piles. A physical model made of steel box of dimensions of 700 ×
700 mm and 800 mm in height was used for accommodation the test model. In order to
study the effect of cap interaction, the first tests were conducted where a gap was left
between the caps and sand surface as reference, and the second tests all caps in contact with
sand surface. The maximum displacement amplitudes and the corresponding resonant
frequencies of the experimental system were measured using vibration meter and
accelometer fixed on the top of the pile cap. The results of both groups indicated that the pile
cap interaction significantly increases the vertical amplitudes and increases slightly the
resonant frequencies in different proportions

Keywords:   Vertical displacement amplitude, resonant frequency, length of pile/diameter ratio (L/d), spacing of
piles/diameter ratio (S/d), and pile groups.

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ASSESSMENT OF NATURAL RADIOACTIVITY LEVELS AND RADIATION HAZARDS FOR BUILDING MATERIALS USED IN SOME SELECTED PROVINCES IN IRAQ

Research Article:

Muhannad Kh. Mohammed
Ministry of Higher Education and Scientific Researches, Al-Mustansiriyh University, College of Basic Education

E-mail addresses: muhannad62@yahoo.com

ABSTRACT

The radioactive properties of building materials used for the construction of habitable
structures in Iraq were investigated in this study. In the framework of this paper, ten samples
of commonly used building materials (bricks and rocks used for incasing) were collected
from ten Iraqi provinces for radiometric analysis. The activity concentrations of natural
radionuclides in the selected samples were determined by gamma ray spectrometry using
sodium iodide (NaI) detector. Based on the results of this study, the use of rocks for incasing
manufactured in Al-Rumadi is considered to be unsafe for human habitation from
radiological points of view due to relatively high background radioactivity. The radioactivity
levels for building materials for the remaining investigated areas were well within the
permissible limits.

Keywords:   Natural Radioactivity Levels, Radiation Hazards, Building Materials

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Volume 3, Issue 2, Dec 2015, Pages 17-27

Research Article:

Arkan Kh. Al-Taie 

Machines and Equipment Engineering Department, University of Technology/Baghdad.

Ali Hayder Mutib

Machines and Equipment Engineering Department, University of Technology/Baghdad.

E-mail addresses:  arkanaltaie@yahoo.com, ahmiceng1990@yahoo.com

ABSTRACT

A numerical simulation to investigate the performance of solar chimney power plant is
presented. A small scale model of solar chimney power plant was modelled by using FLUENT
software. The solar chimney power plants consist of three essential elements, glass roof
collector, chimney (tower) and wind turbine. The output power of the system depends on the
input velocity to wind turbine. The turbine inlet velocity is a function of collector – chimney
junction type. To solve the governing equations of conservation of mass, momentum, energy,
Do- intensity, k and equations the finite volume method was adopted by FLUENT software
to model and analyze such system. The results showed that the geometry of entrance region
(collector-chimney junction type) has an effect on the performance parameters especially air
flow velocity. Using curved or rounded junction with deflector will improve system mass flow
rate by 37.65% as compared with straight junction.

Keywords:  Solar chimney, Numerical simulation ,Junction type, Performance parameters.

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Volume 3, Issue 2, Dec 2015, Pages 10-16

Research Article:

Nabaa Shakir Hadi
College of Engineering, University of Babylon, Babylon, Iraq

E-mail addresses:  nabaalshimmri@yahoo.com

ABSTRACT

The main objective of the present study is to investigate the residential solid wastes characteristics and energy content in Hilla city in the middle of Iraq. The solid waste characteristics, and energy content of Hilla city were found by selecting one area, which represent different lifestyles. Data of samples were collected from 13 multi-storey buildings in the Tuhmaziya region in Hilla city through 2013. The refuse was classified into ten categories (food wastes, paper, plastics , glass, textiles, rubber, tin cans , wood, cardboard, and garden trimmings, etc). The food category was found to be 46.31% of the total weight, and moisture content of 37.52 % .
The chemical formula of a residential solid waste of Hilla city was found to be C802.3 H2630.3 O1074.3 N18 with sulfur and without sulfur as C44.6 H146.1 O59.7 N. The energy content (dry basis) was found to be 12369kJ/kg .

Keywords: Energy content, Residential solid wastes, Chemical formula, Hilla city .

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Volume 3, Issue 2, Dec 2015, Pages 01-09

Research Article:

Riadh A. Abass

Dept. of Civil Engineering, College of Engineering, University of AL. Muthanna

Mustafa Sh. Zewair

Dept. of Civil Engineering, College of Engineering, University of Basrah

E-mail addresses: mm812000@yahoo.com

ABSTRACT

This research is devoted to investigate the effect of CFRP strips on the behavior and load carrying capacity of strengthened I-section reinforced concrete deep beams. The experimental program variables include configurations of CFRP, spacing between CFRP and type of loading (monotonic or cyclic load) on the behavior of strengthened deep beams. The experimental test results confirm that the strengthening technique of CFRP system is applicable and can increase the shear capacity for strengthened of RC beams. In this study, the ultimate load capacity of the strengthened beams ranged between 18% to 38% under monotonic load and between 11% to 26% under cyclic load over the ultimate load capacity of the reference beam. For beams including CFRP changing the spacing of the strips from 50mm to 20mm, increased the strength of the beam by 17%. For beams subjected to cyclic load the mode failure is nearly the same as that of beams subjected to monotonic load and the cyclic loading produced somewhat less brittle behavior in beam under cyclic loading.

Keywords:CFRP, Cyclic load, I-section, Strengthened.

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Volume 9, Issue 1, June 2021, Pages 06-19

Research Article:

Jinan Hassan M. AlAnbaky^a

Hadeel Saad razoki al-mur’ib^b

^aUruk University, Baghdad, Iraq

^bArchitectural Engineering Department / Al-Muthanna university

E-mail addresses:

jana_arch@yahoo.com

ABSTRACT

Previous knowledge has shown a concept revealing different boundaries and relations of building spaces with its outer shell; which represent the boundaries of these spaces. This concept is called interstitial space which is based on creating an interlocution and communication within this space giving a new understanding of meaning and a new approach in architectural formation. This concept of knowledge description has varied as it is linked once to its nature or again to the built environment levels whether it’s architectural or urban diverged within the academic and social context, as well as the blurring relationship nature of this space with the structural system of the building. Therefore, the problem state of this research, which goal focuses on, is highlighted as “the urge to investigate the concept of interstitial structure characteristics”. Yet the methodology of the research is based on the descriptive and analytical approach consisting of three phases; phases one  is to build a theoretical framework about the characteristics of the interstitial space in architecture; second is to conduct a practical study and identify several samples of buildings vary in their structural systems (traditional, structural and space); then analyze data and identify the conclusions of which the interstitial space grows and expands physically and expressively with the presence of the recent constructive systems and the lack of presence of the Interstitial spaced has led to spatial differentiation and closed toward inside especially those designed parametrically and reflect it in the other traditional and structural constructive systems.

Keywords: Interstitial space, structural System, building shell, form/structure.

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Volume 3, Issue 1, December, Pages90-102

Research Article:

Othman Hameed Zinkaah

Assistant Lecturer, Department of civil Engineering, College of Engineering, Almuthana University

E-mail address: Al_azawy2001@yahoo.com

ABSTRACT

 The present investigations consider the effect of hybrid micro steel- polypropylene fibers on high strength concrete. The fractions of steel and polypropylene fibers are 1% and 0.5% by volume respectively. Many mixes have been investigation by combination between steel fibers and polypropylene fibers with different percentages it is (0%S.F-100%P.P.F), (100%S.F- 0%P.P.F), (25%S.F, 75%P.P.F), (50%S.F-50%P.P.F), (75%S.F-25%P.P.F) in addition to reference mix. Properties of high strength concrete such as compressive strength, splitting strength, flexural strength, static modulus of elasticity, and absorption have been studied. The results showed that, the compressive strength decrease by about 28% when adding (0%S.F- 100%P.P.F), and there are a small increasing with adding (100%S.F-0%P.P.F). However the results showed that there are an inverse relationship between compressive strength and theamount of polypropylene fibers. Experimental work also showed that adding (0%S.F-
100%P.P.F)decrease the splitting strength by about 16%, while using hybrid fibers increase the splitting strength but less than its increasing when adding (100%S.F-0%P.P.F). It can beconcluded that, the maximum effect of hybrid fibers is on the flexural strength, it is reach to 128% more than reference mix. Furthermore absorption increases by using polypropylene fibers.

Keywords: steel fibers, polypropylene fibers, high strength concrete, compressive strength, splitting strength, flexural strength, modulus of elasticity.

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Volume 3, Issue 1, December, Pages75-89

Research Article:

Nabil M. A. Hussian

(Ph.D) College of Engineering, Al-Nahrain University
E-mail address: abilali75@yahoo.com

Ali M. Lafta

(M.Sc) College of Engineering , Al.Muthanna university
E-mail address:  alicivel@yahoo.com

ABSTRACT

 This paper presents an analytical research on behavior of columns confined with FRP subjected to axial load and uniaxial bending moment, by using finite element method and ANSYS-14.To indicate the accuracy of this program, five reinforced concrete columns strengthened with carbon fibers from the experimental testing of previous researches are reanalyzed by ANSYS program.The results showed that the percentage of experimental ultimate load to analytical ultimate load are (99.4, 99.6, 99.8, 97.5 and 97.2) %,and there is a reasonable agreement between the load-deflection curves for experimental and analytical results for all studied columns. The effects of important parameters on the ultimate load andthe ductility of the column are studied.The results showed that the ultimate load and the ductility areincreased by 60.3% and 118.8% as the compressive strength increased from 22MPa to 40Mpa.The study shows, that the increasing in CFRP layers lead to increasing in theultimate load and the ductility of the column, The maximum increasing in the ultimate load and ductility for the column are 78% and 69.4% respectively.The results showed that ,the ultimate load and the ductility are increased by 24.1% and 23% respectively when the percentage of steel area is increased from 1% to 4%.Finally, loads with several eccentricities from the center of the column are studied, the results show a significant reduced value in the ultimate load for confined column by 51% at load eccentricity value equal to 125mm.While the column ductility reduced to 42% for the same load eccentricity.

Keywords: column, CFRP, strengthen, eccentrically load, FEF, ANSYS-14

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Volume 3, Issue 1, December, Pages60-74

Research Article:

 Riadh A. Abass

Professor, Dept. of civil engineering, College of engineering, Al.Muthanna University
E-mail address: readh_56@yahoo.com

 Ahad Z. Hamoodi

Ass. Lecturer, Dept. of civil engineering, College of engineering, University of Basrah
E-mail address: msc_eng_ah@yahoo.com

ABSTRACT

An experimental Study was conducted to investigate the size effect on the flexural behaviour of sand-porcelinite lightweight aggregate reinforced concrete one way slabs (SPLWAC OWS). In order to get a clear results, eight slabs were casted, and six of them were strengthened with carbon fibre reinforced polymer (CFRP) strips. To investigate the size effect, four slabs were of 300 mm width, 1500 mm length and 80 mm depth and the others were of 300mm width, 2000 mm length and 108 mm depth. The present study showed that the SPLWAC OWS showed a reverse size effect. The failure mode was by yield of steel for the control un-strengthened slabs, while it was by yield of steel followed by rupture of CFRP strips for the strengthened slabs. Also, the results of this study were compared with those obtained by the ACI equations. This comparison showed that the ultimate moment strength and deflection obtained by the ACI equations were always less than those obtained experimentally.
.

Keywords: Carbon fiber reinforced polymer strips, Sand-porcelinite lightweight aggregate
concrete One way slabs, Monotonic loading, Variable amplitude loading.

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Volume 3, Issue 1, December, Pages46-59

Research Article:

 Riadh A. Abass

Professor, Dept. of civil engineering, College of engineering, Al.Muthanna University
E-mail address: readh_56@yahoo.com

Mustafa Sh. Zewair

Ass. Lecturer, Dept. of civil engineeri, College of engineering, University of Basrah
E-mail address: mm812000@yahoo.com

ABSTRACT

The experimental program consisted of testing four I-section reinforced concrete deep beams strengthened with CFRP strips made from lightweight concrete (porcilinate). The experimental program variables include configurations of CFRP. Experimental results obtained from the adopted strengthening CFRP techniques show a significant improvement in the behavior and shear carrying capacity of reinforced concrete deep beams. A stiffer loaddeflection response is observed for beams strengthened with CFRP strips as compared with response of control deep beam and the inclined CFRP strips give better enhancement than the vertical CFRP strips in ultimate load, deflection and crack width. Nonlinear finite element analysis is performed using the ANSYS-11. The Comparison between experimental results and numerical results indicates that numerical models can successfully used to simulate similar cases. Where the ultimate numerical load to ultimate experimental load ranged between (88%-96%). And good agreement for (load–deflection) curves between numerical and experimental.

Keywords: ANSYS, CFRP, I-section, Lightweight, Strengthened.

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