Category: Uncategorized

Intentionality as a Strategy Read Architectural Production Contemporary

Muthanna Journal of Engineering and Technology

Volume (5), Issue (3), Year (30 December 2017), Pages (102-114)

DOI:10.52113/3/eng/mjet/2017-05-03/102-114

Research Article By:

باسم حسن هاشم الماجدي، أحمد عبد العالي كبة و هديل سعد رزوقي

Corresponding author E-mail: Basim_hhm@yahoo.com

ABSTRACT

By tracking the criticism history of knowledge in all fields including architecture it can be noticed that some theories control on the other because of its regenerative feature to become an objective approach to any kind of criticism because they provide it with a quiet compass inside the artistic production in order not to loose its way towards the target. One of those theories the intentionality theory emerged which linked to the indications related to literary, artistic and architectural production both, the fact that architecture is a communication system can be a language consisting of vocabulary and rules, which the intention can have a prominent role in it. Hence the research problem is (the absence of the overall concept of the role of intentionality theory in reading current architecture production), hence the goal of research is to (see the ranges of influence of the theory of intentionality in reading architectural output). For the purpose of achieving the goal of Search went to put the cognitive framework of the theory of intentionality and its connections in the architecture within the specialized studies and then check the hypothesis, which stipulates (there is the influence of the theory of intentionality in reading architectural production), and through the application of a number of the elected project down to the final conclusions.

Keywords: Intentionality theory, intention, production reading, architecture.

Get Full Access / pdf

Conflict Resolution on Lesser Zab and Diyala Rivers Basins Using Game Theory Approach (Part-I)

Muthanna Journal of Engineering and Technology

Volume (5), Issue (3), Year (30 December 2017), Pages (95-101)

DOI:10.52113/3/eng/mjet/2017-05-03/95-101

Research Article By:

عبد العزيز محمد طيب معروف، كامل علي عبد المحسن و مريوان رضا اغا

Corresponding author E-mail: azizmtt90@yahoo.com

ABSTRACT

The Iraqi water shares from Lesser Zab River (LZR) and Diyala River (DR) is greatly affected by Iranian intensions and attitudes because of its geographic positions as a source country. Consequently, it becomes so warrant to adopt some arrangements that regulate the water relations between those two countries. The current study is an attempt toward finding a reasonable solution for the potential conflict between Iraq and Iran over LZR and DR. The water facts on those rivers are pointed out that the annual average flows recorded during 70’s of the last century were 6.2 and 6.0 BCM for LZR and DR respectively. However, and over the last 20 years or so, these flows have been reduced to only 4.8 and 3.3 BCM respectively. The calculated future demand in the Iranian side of the LZR is estimated to be 0.175 BCM, while the demand in the Iraqi side is around 7.2 BCM. As far as DR is of concern, Iran consumes 3.1 BCM and Iraqi needs are 9.9 BCM. It is clear that the future demands is surpassed the expected future supply from the two rivers. One can conclude that the conflict between Iraq and Iran over LZR and DR is imminent. Part-I of the study is concerning with the application of Graph Model for Conflict Resolution (GMCR-II) which is rooted in game theory and system engineering approaches, for the purpose of resolving the potential water conflict between Iraq and Iran over LZR and DR. While Part-II, is to find a simplified method to facilitate the application of the solution that emerges from the part-I in a practical and systematic manner. This will be the subject of a subsequent paper.

Keywords: Conflict resolution, game theory, GMCR-II.

Get Full Access / pdf

Experimental Study of Rectangular Footing under Inclined and Eccentric load on Geogried Reinforced Sand

Muthanna Journal of Engineering and Technology

Volume (5), Issue (3), Year (30 December 2017), Pages (87-94)

DOI:10.52113/3/eng/mjet/2017-05-03/87-94

Research Article By:

Jawdat K. Abbas and Nasr A. Hasan

Corresponding author E-mail: dr.jawdatkhadim@tu.edu.iq

ABSTRACT

This study investigates the behavior of a rectangular footing subjected to inclined and eccentric load on geo-grid reinforced sand by using laboratory modeling. Small model was used to simulate the behavior of rectangular surface footings (length to width ratios of the footings were equal to 1, 1.25, and 1.5). The effect of the eccentricity and inclination of applied load on the bearing capacity, settlement, horizontal displacement and tilt were investigated. The load eccentricity varies from (0, 0.05B, 0.1B to 0.15B) and the load inclination varies from (00, 50, 100, 150) . The dry sand is reinforced by multiple layers (1, 2, 3, 4 and 5) of Geo-grid. The results illustrated that by increasing the number of reinforcement layers, the bearing capacity increased, but there is an optimum value (5). In general, for central, inclination and eccentricity loading the results indicated that by increasing the number of reinforcement layers (N) the bearing capacity increased while settlement, horizontal displacement and tilt decreased.

Keywords: Bearing capacity, eccentric load, inclined load, geo-grid, reinforced sand, rectangular footing.

Get Full Access / pdf

Symbolic investment of valuable prisons

Muthanna Journal of Engineering and Technology

Volume (5), Issue (3), Year (30 December 2017), Pages (77-86)

DOI:10.52113/3/eng/mjet/2017-05-03/77-86

Research Article By:

أيمن عبد الحسين محمد جواد العبيدي و عباس علي حمزه ال كريزه

Corresponding author E-mail: aymenalobaide@gmail.com

ABSTRACT

The value of prisons is characterized by the total meanings contained within, and the similarities between their walls as a result of certain events or actions that took place between them and which have their impact and their association with the memory of the community and formed an important part of their social identity, Although some of these buildings have many components historical, and heritage-related events in its spatial history, which are reliable development potentials to restore sustainable economic growth by perpetuating its and making it as guidance and informational documents for society. But it suffered from mismanagement, guidance and use by The competent authorities led to the result of these symbolic places atrophy and thus the loss of the privacy of her event. Hence the research problem, which was (the lack of knowledge available about the nature of the investment of the symbolic value of prisons in the commemoration of her memory, so as to ensure their interaction and community outreach) In order to achieve the research objective, which is to (create a comprehensive theoretical framework for the nature of commemorating the prisons by investing their symbolic value and achieving their interaction with the society that contains them). This requires the adoption of an analytical descriptive approach based on building a comprehensive theoretical framework, and then analyze results, To give the conclusions to explore the nature of the commemoration of prisons according to their symbolic data.

Keywords: The valuable prisons, commemoration, functional reformation, symbolic investment, community memory.

Get Full Access / pdf

Illogic Character To Receipt In Architecture

Muthanna Journal of Engineering and Technology

Volume (5), Issue (3), Year (30 December 2017), Pages (36-46)

DOI:10.52113/3/eng/mjet/2017-05-03/36-46

Research Article By:

أحمد هاشم حميد العقابي

Corresponding author E-mail: dr_ahmed524@yahoo.com

ABSTRACT

Generally Architectural proposition has focused on studying general concepts in architecture which has an Action in the practical frame, one of these basic concepts is the receiving concept whirl it has been presented in it is general scheme and its relationship with other various concepts in architecture field; this paper studied the receiving concept in new scheme whirl did not studied before, the new scheme related to logical and nonlogical nature of the receiving concept so the general vision of this paper coordinated to distinguish the proposed themes in sight of the architectural knowledge around it. This paper aims to define the general visions for studying the receiving concept in its general form in the architecture and attempt to present defining forms to specify the ability of distinguishing existence of the concept in its logical and non-logical nature by specifying the scientific proposal and build theoretical frame consisting pointers and practical values of knowledge sample adopted as a case study and analyze the results of that sample and discuss the results of the pointers of different forms and conclude the final conclusions and future works.

Keywords: Architecture, logic, illogic, dual, receiving.

Get Full Access / pdf

Effect of Repeated Loads on Steel – Concrete Composite Beams with High Strength Reinforced Concrete

Muthanna Journal of Engineering and Technology

Volume (5), Issue (3), Year (30 December 2017), Pages (47-56)

DOI:10.52113/3/eng/mjet/2017-05-03/47-56

Research Article By:

Suhaib Yahya Al-Darzi

Corresponding author E-mail: suhaib darzi@yahoo.com

ABSTRACT

The present study utilized an experimental tests to investigate the effects of using High Strength Concrete (HSC) on ultimate resistance, deflection and slip of steel-concrete composite beam under monotonic and repeated loads. Sixteen beams divided into four groups having concrete with compressive strength of 25, 42.6, 43.3 and 43.9MPa investigated experimentally. Results indicated that the use of HSC increases the carrying loading capacity of the beams by about 18.82 % and 52.91 % under monotonic and repeated loads, respectively. The beam resistance decreased under repeated load in comparison with monotonic load by about 5 % to 28.53 %. Use the fiber increases the ultimate strength by about 10 % to 28.65 %, and decrease the deflection and slipping by 15 % and 26.5 %, respectively. The ultimate strength estimated experimentally are less than the AISC-LRFD specifications’ formulas.

Keywords: Beam flexure test, high performance concrete, fiber concrete, composite beam, repeated load.

Get Full Access / pdf

Multiple Vehicles Detection Using A Hybrid Segmentation Technique

Muthanna Journal of Engineering and Technology

Volume (5), Issue (3), Year (30 December 2017), Pages (25-35)

DOI:10.52113/3/eng/mjet/2017-05-03/25-35

Research Article By:

Ahmed Freidoon Fadhil

Corresponding author E-mail: ahmedfadhil83@uokirkuk.edu.iq

ABSTRACT

The visual analysis of moving objects has been an important computer vision research area. As the number of vehicles is increasing on the roads, the need for accurate detection of vehicles is rising. A hybrid segmentation method that combines background subtraction, threshold segmentation, morphological operators, and watershed segmentation is proposed in this paper.
The shadow has a vital effect on the performance of many fields like tracking, classification, detection, and shape analysis. The shadow presented in the data used in this paper was successfully removed using watershed and shape analysis. Since the connected vehicles touch each other in the boundary only, the watershed transform can correctly isolate these touching cars. The proposed system overcomes the over-segmentation drawbacks of the watershed transform by applying it to the gradient of the image rather than the image itself.
Finally, shape analysis is used to remove large shadow parts which lead to the detection of the vehicles only. An accuracy detection rate of 97% was reported from the highway video which is astonishing result compared to existing methods. The proposed algorithm was coded using MATLAB R2014b programming language. The accuracy and simplicity of the proposed system make it applicable for real-time traffic surveillance Applications.

Keywords: Detection, background subtraction, threshold method, watershed transform, and shape analysis.

Get Full Access / pdf

Fresh and Hardened Characteristics of Sustainable Self-Compacting High Performance Concrete Incorporating Silica Fume

Muthanna Journal of Engineering and Technology

Volume (5), Issue (3), Year (30 December 2017), Pages (14-24)

DOI:10.52113/3/eng/mjet/2017-05-03/14-24

Research Article By:

Haider Mohammed Owaid

Corresponding author E-mail: eng.haider.ma@uobabylon.edu.iq

ABSTRACT

This paper mainly presents the producing of self-compacting high performance concrete (SCHPC) incorporating silica fume (SF) as a supplementary cementing material. Various percentages of replacement by weight of cement were tried including 5, 10 and 15%. The water/ binder (W/B) ratio and total binder content for all types of mixes were fixed at 0.30 and 484 kg/m3, respectively. The fresh properties of SCHPCs were investigated by slump flow, T50, V-funnel flow time and L-box (blocking ratio) tests. The hardened properties of SCHPCs were tested for bulk density, compressive, splitting tensile and flexural strengths and ultrasonic pulse velocity (UPV). The results showed that there was a progressive decrease in flowability properties of SCHPC with increasing SF content. Whereas, test results the compressive, splitting tensile and flexural strengths and UPV increased with increase in SF levels. Furthermore, SCHPC mixture contains 10% cement replacement of SF exhibited higher values of compressive strength, splitting tensile strength, flexural strength and UPV compared with control mix of SCHPC for 28 days. The final conclusion is that SF can be used as a sustainable supplementary cementing material in producing self-compacting high performance concretes.

Keywords: Self-compacting high performance concrete (SCHPC); silica fume; pozzolanic activity; fresh properties; hardened properties.

Get Full Access / pdf

Earthquake Rating of Pore Water Pressure Generation – Induced Liquefaction of Earth Fill Embankments by Numerical Simulation

Muthanna Journal of Engineering and Technology

Volume (5), Issue (3), Year (30 December 2017), Pages (01-13)

DOI:10.52113/3/eng/mjet/2017-05-03/01-13

Research Article By:

Baydaa Hussain Maula, Hussein Yousif Aziz and Kareem Hassan Alwan

Corresponding author E-mail: dr.maula@itbaghdad.edu.iq

ABSTRACT

The collapse of embankments, dams and slopes in the Arab world has become a phenomenon need to stand on the causes and consequences. The magnitude of the devastation due to Liquefaction phenomenon need to take the necessary precautions to reduce potential losses. Investigation of the (naturalist and imitation) of slopes and embankments stability is a hard geotechnical errand. Therefore embankments numerical study is implementing to diminish the situation of falling flat slants and rashes during shaking through appropriate FEM software. The FOS and liquefaction potential trend are obtained using finite element technique “Newmark” deformation analysis. The conformity of the analysis is verified by inquiry a layered slope of two altered soil deposits exposed to earthquake shaking. The conclusion from the study proved that the soil stratified trend has an immediate influence on the stability of the slope due to shaking and it is the simplest technique to reduce shaking effect. All combined phenomena which have delivered serious harm all over the world concentrated under quake examined under a record of 0.1 to 0.5g with particular case study to explore liquefaction zones due to the quake. Changeability of textural properties of soil layers affecting FOS and liquefaction has been examined for embankments. This study comes to put a highlight on Mosul Dam problem and give some suggestion and conclusions to its problems.

Keywords: Seizmic zones; geostudio 2007; erathfill dam; Imitation slope; numerical simulation; Mousl.

Get Full Access / pdf

The expressive relationship between the external formation and the internal void

Muthanna Journal of Engineering and Technology

Volume (6), Issue (1), Year (30 June 2018), Pages (96-112)

DOI:10.52113/3/eng/mjet/2018-06-01/96-112

Research Article By:

باسم حسن الماجدي، مصطفى علي مدلول و سراج جبار المرشدي

Corresponding author E-mail: basim_hhm@yahoo.com

ABSTRACT

The architectural styles and Methods it Appeared and that were varied and Multiply to bear a distinct and aesthetic identity, especially in the external form and predicates in internal structure of the building. The conditions surrounding the building had a great effect in the formulation of the architectural work represented in the internal composition of the spaces based on the prevailing ruling thought which was accompanied by the external configuration also strong and clear architecturally And Idiomatic, With a variety of time periods accompanied by a difference in cultural, social and intellectual values, there is a philosophy of architectural expression carried by that relationship between architectural and conceptual philosophical design which is used to understand the relationship between external configuration and internal configuration , Therefore, the research problem came with (the absence of a clear perception of the expressive relationship between the external configuration and the internal space and its effect on the recipient). Which called for studying the intellectual approaches to the relationship between the external configuration and the internal vacuum Which led to the search for a general framework for understanding the mechanisms of architectural expression at the philosophical and design level , and then formulate and test the virtual perceptions of the research and application by asking a questionnaire form, which depends on the theoretical framework drawn from a group of residents from within the field of architecture (Department of Architecture, University of Babylon), On a set of research samples. The research adopted qualitative measurement of results. The research found that the use of the principle of integration in architecture requires an expressive relationship between form and space, emphasizing this intellectual compatibility and achieving the visual pleasure of the recipient.

Keywords: External formation, internal space, architectural expression mechanisms, integration, contradiction.

Get Full Access / pdf

The community participation authority in the empowerment of architectural products

Muthanna Journal of Engineering and Technology

Volume (6), Issue (1), Year (30 June 2018), Pages (64-75)

DOI:10.52113/3/eng/mjet/2018-06-01/64-75

Research Article By:

باسم حسن هاشم الماجدي و هديل سعد رزوقي

Corresponding author E-mail: Basim_hhm@yahoo.com

ABSTRACT

The community participation its one of empowering strategy considered as a contemporary concepts within the 20th century which enable us to connect (designer and community empowering production aims to free the potential of individuals, and involve them in the process of construction as success depends on the harmony of the individuals needs with an organized vision of long-term goals. In this light, the problem of research was determined as ( the lack of knowledge clarity about the concept of community participation as a reflection of the power of society in the empowerment of production in contemporary architecture ).
According to this research problem, the hypothesis of research has been determined (The strategy of community participation represent an indicator to the level of integration between society designer to enable architectural production. The efficient societal participation may produced an important level of sustainability) The aim of the research is (To achieve the objective of the research, the comprehensive theoretical framework is required through the basic vocabulary (empowerment, , participation mechanisms, characteristics of participatory production sustainable empowerment) that have been applied to selected samples.
Toward the final stage, which focused on analyzing and discussing the results and determining the final conclusions. society through the analysis and measurement of the variables to find that the results varied as the main and secondary according to the infrastructure of the community and prove its importance in reaching the highest degrees of participation to achieve a product acceptable to the community and satisfaction of the designer.

Keywords: Empowerment, community participation, product, community sustainability.

Get Full Access / pdf

Study the Effects of Improving Power Factor on Electrical Distribution Network in Al-Muthanna Governorate

Muthanna Journal of Engineering and Technology

Volume (6), Issue (1), Year (30 June 2018), Pages (52-63)

DOI:10.52113/3/eng/mjet/2018-06-01/52-63

Research Article By:

Ali Abed Aljabar Hussen Al-Samawi

Corresponding author E-mail: aliasamaw@mu.edu.iq

ABSTRACT

This paper represents analysis and study the effects about improve power factor for an electric distribution network in Al- Muthanna governorate, and show method Calculation of power factor, apparent power, reactive power and current, compare these results with regard to before and after the improved power factor in the electric distribution network in Al- Muthanna governorate. This paper represents the results of the improvement of the power factor by increasing the efficiency and the capacity of the electrical system…etc. Calculation of the percentage of the reduction of electric power losses and calculating the monthly cost of this reduction The difference in the apparent power between before and after improvement is 19.5 MVA from the change of power factor in 78 feeders of the electric distribution network of Al- Muthanna Governorate.

Keywords: Power factor, relative power.

Get Full Access / pdf

Simulation of Cylindrical Body Structure Subjected to Flow in Different Reynolds Number Regimes

Muthanna Journal of Engineering and Technology

Volume (6), Issue (1), Year (30 June 2018), Pages (45-51)

DOI:10.52113/3/eng/mjet/2018-06-01/45-51

Research Article By:

Mohammed J. Mawat

Corresponding author E-mail: mohammed.mawat@gmail.com

ABSTRACT

A vacillating forces on the body are causes by The vortex shedding vacillate, and generating a cyclic variation in two directions, cross flow(CF), in same direction of flow and in-line(IL) with direction normal to flow. Determination of the force components, (CF) and (IL) directions is important when doing further Lock-in state. As a choice an alternative to response models the Computational Fluid Dynamics (CFD) simulations is presented and can be adopted for vortex induced vibration (VIV) analysis to conquer the restrictions of the status approach of practice engineering. To estimate the lift and drag coefficients the turbulent flow is simulated depending on shear stress transport(SST) of k-ω turbulence model with characteristics which utilized time dependent test (transient) using ANSYS FLUENT 16.1 and examined at various values of Reynolds number (30, 75, 200 and 1000) with uniform velocities of (0.06, 0.15, 0.4 and 2) m/s to overcome laminar, transport and turbulence regimes. At Re < 40 no lift force component will effect on the cylinder, then it clearly appears in the regime Re greater than 40.

Keywords: Computational fluid dynamic, Reynolds number, vortex induced vibration, Von Karman street.

Get Full Access / pdf

Wemos-D1 and Raspberry Pi3 Based Smart Communication and Control of Home Appliances System

Muthanna Journal of Engineering and Technology

Volume (6), Issue (1), Year (30 June 2018), Pages (29-44)

DOI:10.52113/3/eng/mjet/2018-06-01/29-44

Research Article By:

Bilal Naji Alhasnawi and Basil Hani

Corresponding author E-mail: bilalnaji11@yahoo.com

ABSTRACT

Expansion in smart home technology assists people around the world to improve the quality of life individuals. Various smart home technologies considered in our work include Email based smart home systems, Bluetooth based smart home systems, Global System for Mobile communication or mobile based smart home systems, Short Messaging Service based smart home systems and Internet-based smart home systems. We need a low power device that transmits messages through a less verbose protocol. Owing to the ubiquitous availability of WiFi, all the appliances within a home can be connected through a common gateway (Raspberry pi3). This paper presents an overview of a lightweight Message Queuing Telemetry Transport (MQTT) protocol. Sensors and actuators are connected to Wemos-D1 board. In the prototype home, we implemented MQTT on Raspberry pi3 and Wemose-D1 board.

Keywords: MQTT; raspberry Pi3 board; home devices; sensors; wemose-D1 board.

Get Full Access / pdf

Experimental and Numerical Study of Thermal Properties for Amalgam Reinforced by NiCrMo Nanowires

Muthanna Journal of Engineering and Technology

Volume (6), Issue (1), Year (30 June 2018), Pages (20-28)

DOI:10.52113/3/eng/mjet/2018-06-01/20-28

Research Article By:

Rana Afif Anaee, Alaa Hassan Ali, Farooq Hassan Ali and Ahmed Rajih Hassan

Corresponding author E-mail: ah.ra34@yahoo.com

ABSTRACT

NiCrMo nanowires with four weight percents include 0.3, 0.6, 0.9 and 1.2 wt% have been added to conventional amalgam to improve its properties especially thermal conductivity which is represented important property to reduce the sensation of root for hot and cold foods and beverages. NiCrMo nanowires were selected because they closed in composition to the known dental alloy (Ni-Cr alloy). SEM technique was used to characterize the modified structure of nanocomposites.
The thermal conductivity was decreased after adding NiCrMo nanowires to amalgam and the reduction is increases with increasing wt% of nanowires, this is due to the dominance of smooth temperature dependence by nanowires which suggest a phononphonon or phonon-defect scattering. AFM inspection also was achieved to show the morphology of surface in addition to measure roughness, and the results showed the decreasing in roughness of amalgam/nanowires composites compared with amalgam due to decreasing in surface irregularities by adding nanowires. This reduction in roughness leads to decrease the accumulation of bacteria on amalgam and then reducing biocorrosion. Also, microhardness of amalgam/NWs composites was increased compared with conventional amalgam and the increment increased with increasing wt% of nanowires. The increment in microhardness is suggested the filling of vacancies within amalgam by nanowires and getting more coherent for components in amalgam especially with Hg which is the main cause of the reduction in hardness. On the other word, in present work, we improved thermal conductivity in addition to get more microhardness and less surface roughness by adding nanowires. Simulation study was achieved for thermal properties to confirm the role of NiCrMo nanowires to reduce heat.

Keywords: NiCrMo nanowires; thermal analysis; ANSYS 15; conventional amalgam.

Get Full Access / pdf

The Impact of Abandoned Buildings on the Quality of Urban-Scape

Muthanna Journal of Engineering and Technology

Volume (6), Issue (2), Year (30 December 2018), Pages (222-236)

DOI:10.52113/3/eng/mjet/2018-06-02/222-236

Research Article By:

وحدة شكر الحنكاوي و محمود حسين محمد علي

Corresponding author E-mail: wahdahankawi@gmail.com

ABSTRACT

Cities pass through several transformations during their stages of development, the most influential was the one that accompanied the industrial revolution and modernity, resulting in scattered structures, functional requirements and industrial activities that affected cities spatially. The advancement of knowledge, technological development, innovation, and industrial progress in the post-industrial era had a great impact on the adoption of more technological applications in conjunction with the global transformations and globalization, this has resulted in the phenomenon of neglected buildings. which has been reflected in buildings, structures, industrial zones, and the quality of urban fabric, and its scene, from which the problem of research was identified as “lack of cognitive perception showing the impact of neglected buildings on the urbans cape “. In order to address the research’s problem, a comprehensive theoretical framework was developed for the concept of abandoned buildings, the main reasons, levels of abandonment, and neglect in general. The most important suggestions the impact the quality of the urbans cape, in particular, The research has reached special conclusions, recommendations, procedures and requirements for the owners of buildings to achieve and reduce its negative impact on the urban-scape.

Keywords: Abandoned buildings, urban-scape, urban fabric, urban decomposition.

Get Full Access / pdf

Flexural Behavior of Reinforced Concrete T-Beam Cast with Self Compaction Concrete Incorporating Recycled Concrete Aggregate

Muthanna Journal of Engineering and Technology

Volume (6), Issue (2), Year (30 December 2018), Pages (210-221)

DOI:10.52113/3/eng/mjet/2018-06-02/210-221

Research Article By:

Ali K. Khtar and Dr Jamal A. Khudhair

Corresponding author E-mail: alikadrkhatar1986@gmail.com

ABSTRACT

This study investigates (experimentally and analytically) “the flexural behavior of six T-section beams cast with self-compacting concrete (SCC) which contain recycled concrete aggregate as a partial replacement of coarse aggregate. The beams have two concentrated loads. Beams have two longitudinal steel ratios of (ρ1=0.0004 and ρ2=0.00077). The tested beams were divided into two groups depending on span to effective depth (a/d) ratio the longitudinal steel ratio . Each group was casted using three type of mixtures with different RCA replacement ratio (0% ,50%, 75%). The SCC T-beams have ( a/d) ratio of 3 and total length of (2.1 m) and all beams have gross section area of (0.504) m2. As well as ANSYS-14 program was used to analyze these beams by nonlinear finite element method. Test results showed that, when increasing the RCA replacement ratio to 50% the cracking load decreased by average 15.5% and ultimate load was not affected. When increasing the RCA replacement ratio to 75% the cracking load and ultimate load decreased by average 31% and 9.4% respectively, the deflection and crack width of the tested beams increases with increasing RCA replacement ratio, when the steel ratio increased from ρ1 to ρ2 the first cracking load and ultimate load increased by average 20.5% and 46.2% respectively. The deflection and crack width of the tested beams decreases with increasing longitudinal steel ratio. The finite element model gives good agreement with the experimental results with difference within 8%.

Keywords: T-beam, self-compacting concrete, recycle concrete aggregate, flexural behavior.

Get Full Access / pdf

Flexural behavior of R.C. two-way slabs with opening strengthened with CFRP sheets

Muthanna Journal of Engineering and Technology

Volume (6), Issue (2), Year (30 December 2018), Pages (200-209)

DOI:10.52113/3/eng/mjet/2018-06-02/200-209

Research Article By:

Esraa Jassim Mohammad and Mazen Dewan Abdulla

Corresponding author E-mail: esraajm23@gmail.com

ABSTRACT

This paper present a study of the flexural behavior of reinforced concrete two way slabs with opening strengthened by Carbon Fiber Reinforced polymer sheets.
The experimental work included testing 10 specimen two-way slabs with opening, which include 4 control specimens and 6 strengthened with CFRP sheets. The dimensions of the slab specimens are (800 × 800) mm, (70) mm depth and they were made of normal strength concrete. The reinforced concrete slabs containing a single eccentric and concentric opening strengthened by CFRP sheets, has been investigated, also the behavior of unstrengthened slabs and the slab without openings has been studied. These slabs were arranged in four groups and four layout of CFRP sheets has been considered. The slabs were tested with uniformly distributed loads and simple supports on the four edges. The results showed that the load carrying capacities have been increased of the slabs with openings strengthened with CFRP sheets when compared with the slabs without strengthening.

Keywords: Two way slab; slab with openings; CFRP sheets.

Get Full Access / pdf

Methods and Means of Applying Sustainability Concept in the Constructions

Muthanna Journal of Engineering and Technology

Volume (6), Issue (2), Year (30 December 2018), Pages (169-184)

DOI:10.52113/3/eng/mjet/2018-06-02/169-184

Research Article By:

عمر حازم خروفة

Corresponding author E-mail: omararch2003@gmail.com

ABSTRACT

Sustainability concept with all its multi levels and branches is considered one of the most important concepts used within many developmental sectors today which is ruled by technological, political and economical challenges equally .The modern presentations of sustainable architecture concept has referred to the existence of many sides which are missed by many of us and classified outside sustainable architecture concept, furthermore, most of these presentations have be raised during the second half of the last century, but the new century came with new presentations which adopted new forms of the concept, all sustainable architecture presentations referred to the possibility of applying it according to environmental, social, economical and functional considerations. Treatment of these considerations is with, first: physical relates to the tangible sides such as spaces and resources, while the second side, is behavioral connected to the humanitarian characteristics related to the concept with all its ideas and directions concerning the movement function, activity and living status, etc. The current research deals with the criticism and analysis (methods and means of applying sustainability concept in the constructions) through a descriptive analysis for all the sustainable constructions and the effect of the applying the concept on them with different forms.

Keywords: Sustainability, sustainable architecture, sustainable buildings.

Get Full Access / pdf

A Hydraulic Model for Identification of Surface Friction Coefficient for Euphrates River within Al Muthanna Governorate, Iraq

Muthanna Journal of Engineering and Technology

Volume (6), Issue (2), Year (30 December 2018), Pages (160-168)

DOI:10.52113/3/eng/mjet/2018-06-02/160-168

Research Article By:

Hussein M. Ashour Al. Khuzaie Ameera Mohamad Awad and Mohammed Fadhil Abbas

Corresponding author E-mail: hma@mu.edu.iq

ABSTRACT

This study presents results of a developed hydraulic model to the surface friction roughness (Manning’s coefficient) for the Euphrates River along 110 km within Al Muthanna Governorate, Iraq. Hydraulic modeling was used a tool for determination of surface friction coefficient. A typical value of surface friction roughness for open natural channels ranges between 0.025 to 0.04 was used as an initial input data for HECRAS hydraulic model. while in this study the calculated value of the surface roughness was compared with those observed and it was found to be in best agreement with the modeled when using value is 0.04.

Keywords: Euphrates River, HEC-RAS model, manning’s coefficient, steady flow.

Get Full Access / pdf