Yasser I O Yahia1 Manal O. Suliman2 Abdulrazzaq Jawish Alkherret3 shehdeh ghannam
Theoretical Analysis Of Factors Affecting Ultimate Nominal Load Of Reinforced Concrete Axially Loaded Short Squire Columns (Pu) Comparing with Prokon Program
One of this theoretical study, parameters that affecting
the ultimate load capacity of the axially loaded column are
studied. The parameters such as compressive strength of
concrete and steel reinforcement ratio. Throughout study a
different value of each factor will be assumed. Then the nominal
load-carrying capacity of axially loaded column was calculated
for these different factors parameters according using the
simplified methods provided in (ACI-318- 14) building code
requirement for structural concrete and Prokon Program. It is
observed that increasing the compressive strength of concrete
result in improving the ultimate load capacity. Using
compressive strength of concrete more than 40MPa which
results in increasing of (Pu) from (2362kN) to(5918KN) . On
other hand The total area of longitudinal reinforcement bars
(AST), and the gross area of concrete section (Ag) have a
significant effects also on increasing of (Pu) value but not as
(Fcʹ).
Mansour al Safran , Shehdeh Ghannam , Bassam Abu Awwad
Architectural and Structural Behavior Domes in Islamic Architecture
This research aimed at tracking and investigating the evolution and development of domes construction,
design, sizes, shapes, used materials, and functions of the domes during the different eras of the Islamic
architecture. To achieve the research’s objectives, the study used the descriptive, analytical and historical
methods to deepen and enriching understanding the value and the aesthetic features of the domes, and the
used instructional methods, how they were developed from bricks, stones, to reinforced concreted covering
wider spans of the mosque to provide good view to the Mihrab and to see the speaker. In addition, the
research used a case study dome of Mosque King Abdullah Ben Al-Hussein to learn useful lessons from
some of the tumbles in the construction of the dome during the construction and after the usage, including
sound distortion and echo resulting from lack of adherence with the golden percentage, between the dome’s
height and width of the mosque. Finally, the research based on the review of the previous domes
construction introducing some recommendations to the designers of the domes, the most important to
sustain the beauty and significance of the domes without imitation of other domes rather through carefully
study the internal and external constraints to reach the optimal result at cost effectiveness.
Uses of Destructed Concrete in Establishing Simple Houses for Displaced People
The need in the construction sector continues to demand for destructed concrete, especially in times of war,
and for low-income displaced people. Lack of natural resources to obtain scrap, is one of the biggest
problems facing the concrete production. The environmental pollution is as a result of the building
destruction. Waste collects and poses an environmental risk to human health, organisms and nature.
Nowadays, great interest has been developed for the reuse of recycled destructed concrete aggregates
which represent a very large proportion of the volume of destructive concrete resulting from the wars and
the destructions in the Middle East. Low cost and acceptable quality, are also essential for low-income
housing. The main goal of this research is to obtain concrete at low cost for this purpose. The experimental
out comes indicated that the cubic compressive strength measured for the test specimens; the concrete
compression was found to increase as the rate of replacement of the destructed concrete was reduced. The
conventional concrete of 25 MPa specific strength at 28 days was used for comparison purposes. The
importance of this study is to construct simple houses from recycled destructed concrete for emigrant low
income displaced people, after the war and earthquake stopped. Also to study the efficiency of produced
concrete as a replaced aggregate through evaluation of some physical and behavioral characteristics.
Journal: International Review of Basic and Applied Sciences , Volume : 8 Issue :1
Yasser I O Yahia , Manal O. Suliman , Abdulrazzaq Jawish Alkherret , Shehdeh Ghannam
Theoretical Analysis Of Factors Affecting Ultimate Nominal Load Of Reinforced Concrete Axially Loaded Short Squire Columns (Pu) Comparing with Prokon Program
One of this theoretical study, parameters that affecting
the ultimate load capacity of the axially loaded column are
studied. The parameters such as compressive strength of
concrete and steel reinforcement ratio. Throughout study a
different value of each factor will be assumed. Then the nominal
load-carrying capacity of axially loaded column was calculated
for these different factors parameters according using the
simplified methods provided in (ACI-318- 14) building code
requirement for structural concrete and Prokon Program. It is
observed that increasing the compressive strength of concrete
result in improving the ultimate load capacity. Using
compressive strength of concrete more than 40MPa which
results in increasing of (Pu) from (2362kN) to(5918KN) . On
other hand The total area of longitudinal reinforcement bars
(AST), and the gross area of concrete section (Ag) have a
significant effects also on increasing of (Pu) value but not as
(Fcʹ)
Journal: Journal of Advanced Sciences and Engineering Technologies (JASET) , V.3 . Issue:2
Musab Abuaddous, A Ja’far, Mohammed A KA Al-Btoush, Abdulrazzaq Jawish Alkherret
Building Information Modeling Strategy in Mitigating Variation Orders in Roads Projects
Most governmental projects in Jordan have cost overrun, it rises during the on-going stage to increase the cost and prolong the time of the project. Unfortunately, until this moment, there is no particular management system in Jordan construction industry to minimize cost overrun and variation order adopted by the government. In contrast, global construction industry has witnessed a huge transformation in terms of the use of digital technologies, particularly Building Information Modeling (BIM) which is a revolutionary digital technology and operation that is reshaping the Architecture, Engineering and Construction (AEC) industry. approach and objectives causes before of this paper are firstly to review the factors contributing to variation orders in governmental road projects in Jordan, secondly, to propose a BIM design applications strategy to minimize variation orders, to achieve the objectives a quantitative approach was followed by distributing a questionnaire, then the data was analyzed statistically using relative importance index, the results were as follow. Our findings suggests that the most important factors causing change orders were as follow: Inaccurate quantity take-off (0.66); Labours or material not meeting the specifications (0.63); Logistic delays (0.60); Internal politics (0.566); and the equipment and tools are not available (0.55). The results also indicate that Contract Parties, Consultant, Contractor and Other Variations had significant positive effects on V. O, whereas the effects of BIM Design Applications, Facility Operations Simulation, Exploration Design Scenarios, BIM Design Detection,(BIM Quantity Take-off and Cost Estimation) had a …
Xiao Feng Li, Shu Ing Doh, Wei Ying Feng, Ja’far A Aldiabat Albtoosh, Beng Wei Chong
The Mechanical Properties of Concrete Incorporating Steel Slag as Supplementary Cementitious Material
Steel slag (SS) is a kind of industrial solid waste usually been dumped at landfills and causes environmental pollution. Previous studies have demostrated that SS can be an alternative material to be used for making concrete and could achieve good mechanical properties, which not only reduce natural resources depletion but also improve environmental quality. This study aims to evaluate the effectiveness of SS as supplementary cementitious material (SCM) partially replacing cement on workability and mechanical properties of fresh and hardened concrete. X-ray flouresence test, slump test, compressive strength test and ultra pulse velocity test have been conducted. Mix designs are determined with replacement proportion of cement by SS of 0, 10%, 20%, 30%, 40% and 50%. Results show that replacement of cement by SS up to 50% increase the workability of concrete. The density of concrete ranges from 2083 …
Sadia Tasnim, Faiz Uddin Ahmed Shaikh, Prabir Sarker, Shu Ing Doh, Ja’far A Aldiabat Albtoosh
A Comprehensive Review of Flexible Pavement Failures, Improvement Methods and its Disadvantages
Flexible pavement failure has been a major problem encountered in various countries. Some common distress which had been listed are cracking and rutting. The causes of this distress are due to moisture, weak sub-grades and poor construction quality. High amount of distress in the pavement however is likely to cause dis-comfort for the passengers, higher accident rate and heavy traffic. Study suggested that, flexible pavement failure can be reduce, through maintenance of the wearing course of the pavement, improving the base, sub-base layer or the sub-grade soil underneath of the pavement. However, high production or material cost, high construction cost, excessive settlement, or weak inter-molecular bonds in the flexible pavement are some of the common problem encountered with the current improvement techniques. This significance difference of this review paper compare to other is that, in this review …
Huthaifa Obeidat, Atta Ullah , Ali AlAbdulla, Waqas Manan, Omar Obeidat, Wafa Shauieb, Yousef Dama, Chakib Kara‐Zaïtri and Raed Abd‐Alhameed
Channel Impulse Response at 60 GHz and Impact of Electrical Parameters Properties on Ray Tracing Validations
This paper outlines a study of the effect of changing the electrical properties of materials
when applied in the Wireless InSite (WI) ray‐tracing software. The study was performed at 60 GHz
in an indoor propagation environment and supported by Line of Sight (LoS) and Non‐LoS measurements
data. The study also investigates other factors that may affect the WI sensitivity, including
antenna dimensions, antenna pattern, and accuracy of the environment design. In the experiment,
single and double reflections from concrete walls and wooden doors are analysed. Experimental
results were compared to those obtained from simulation using the WI. It was found that materials
selected from the literature should be similar to those of the environment under study in order to
have accurate results. WI was found to have an acceptable performance provided certain conditions
are met.
Huthaifa A. Obeidat, Omar A. Obeidat, Mahmood F. Mosleh, Ali A. Abdullah, Raed A. Abd-Alhameed
Verifying Received Power Predictions of Wireless InSite Software in Indoor Environments at WLAN Frequencies
This paper introduces a study on verifying received power at WLAN frequencies in indoor environments, Wireless InSite is a popular electromagnetic ray-tracing software which is widely used for predicting channel behaviour in indoor and outdoor environments. The study compares software-generated data with measurements collected through 3rd floor Chesham Building, University of Bradford, at WLAN frequencies, the paper also investigates the effect of changing settings on results accuracy and computational time, and finally, the paper presents a comparison between simulation results with empirical models.
الشبكات العصبية الإصطناعية هي عبارة عن نظام لمعالجة البيانات بشكل يحاكي و يشابه الطريقة التي تقوم بها الشبكات العصبية. Elements التي تدعى هنا بالعصبونات ومؤشرات هذه العناصر
فهي تقنيات حسابية مصممة لمحاكاة الطريقة التي يؤدي بها الدماغ البشري مهمة معينة، وذلك عن طريق معالجة ضخمة موزعة على التوازي، ومكونة من وحدات معالجة بسيطة، هذه الوحدات ما هي إلا عناصر حسابية تسمى عصبونات أو عقد Nodes, Neurons والتي لها خاصية عصبية من حيث أنها تقوم بتخزين المعرفة العملية والمعلومات التجريبية لتجعلها وهى متاحة للمستخدم وذلك عن طريق ضبط الأوزان ANN تتشابه مع الدماغ البشري في أنها تكتسب المعرفة بالتدريب المعرفة باستخدام قوى وصل داخل العصبونات تسمى الأوزان التشابكية. وهناك أيضا تشابه عصبي حيوي مما يعطي الفرصة لعلماء البيولوجيا في الاعتماد لفهم تطور الظواهر الحيوية ، فكما أن للإنسان وحدات استشعار توصله بالعالم الخارجي وهي حواسه الخمس، فكذلك الشبكات العصبية تحتاج لوحدات إدخال ، ووحدات معالجة يتم فيها عمليات حسابية تضبط بها الأوزان و نحصل من خلالها على ردة الفعل المناسبة لكل مدخل من المدخلات للشبكة . فوحدات الإدخال تكوّن طبقة تسمى طبقة المدخلات، و وحدات المعالجة تكوّن طبقة المعالجة وهي التي تخرج نواتج الشبكة. وبين كل طبقة من هذه الطبقات هناك طبقة من الوصلات البينية التي تربط كل طبقة بالطبقة التي تليها والتي يتم فيها ضبط الأوزان الخاصة بكل وصلة بينية، وتحتوي الشبكة على طبقة واحدة فقط من وحدات الإدخال , ولكنها قد تحتوي على أكثر من طبقة من طبقات المعالجة