Publications

Building Information Modeling (BIM) has brought about a qualitative change in the design and management of construction projects because it represents a digital simulation of the physical characteristics of the building, and this increases its efficiency before the actual construction begins.In Iraq, most construction projects still use CAD two-dimensional drawing for the purpose of the implementation process, especially government projects, and this causes many problems due to the difficulty of communication between the various disciplines involved in the design and misunderstanding during implementation.This type of problem is reduced by combining BIM drawings prepared by designers and making them into a single model.In this process of merging conflicts are found using BIM tools such as Autodesk Navisworks.There are three main types of detection.This article includes how a clash detector can help improve clashes in the design phase before starting to construct a specific building using BIM applications and focuses on hard detection type (overlap of a particular element with the others).The methodology involved in this research is to study an educational building (24-classroom model school) consisting of structural and architectural BIM models only, clash detection analysis is done using Autodesk Revit and Autodesk Navisworks Manage software.

Çalışma kapsamında uygulamada sıkça kullanılan StaSTEEL ile referans olarak SAP2000 paket programları kullanılarak, simetrik ve L formunda asimetrik kat şekline sahip üç katlı, on katlı ve on beş katlı çelik yapılar ile bu yapılardan farklı tek katlı bir sanayi yapısı modeli, iki paket program ile çözümlenmiştir. Literatürde, StaSTEEL ile yapılmış çalışma bu araştırma yapıldığı sırada hiç bulunmamaktadır. Çalışma içerisinde incelenen bina tipi toplam 7 adettir. Analiz sonucu elde edilen kat ağırlıkları, doğal titreşim periyotları ve elemanlar üzerinde oluşan eksenel, kesme ve moment gerilmeleri bakımından paket programların sonuçlarının karşılaştırılması yapılmıştır. Ayrıca programların ara yüzleri incelenerek kullanıcı için veri girişi, sonuçların irdelenmesi ve çıktılar konusunda ihtiyacın nasıl ve ne kadar karşılandığı araştırılmıştır. Yapı çözümlemeleri için 2019 yılında yürürlüğe giren Türkiye Bina Deprem Yönetmeliği’nde belirtilen kurallar kullanılmıştır. İki paket programın çözümleme sonuçlarının birbirine benzer olduğu gözlenmiştir. Simetrik ya da asimetrik, az katlı veya çok katlı fark etmeksizin oluşan iç kuvvetlerde N, V ve M için en büyük farklar sırasıyla %3, %3,5 ve %2,7 mertebelerindedir. Bununla birlikte StaSTEEL programının gerek veri girişi gerekse sonuçların irdelenmesi konusunda daha kolay olduğu gözlenmiştir. Ayrıca hazırlanan hesap raporlarının daha detaylı ve görselliği yüksek olduğu sonucuna varılmıştır.

Since the earthquakes in Northridge and Kobe in 1994 and 1995, respectively, many investigations have been carried out towards improving the strength and ductility of steel beam to column pre- and post-Northridge connections. In order to achieve these objectives, recent researches are mainly focused on three principles: reducing the beam section to improve the beam ductility, adding different kinds of slit damper to beam and column flanges to absorb and dissipate the input earthquake energy in the connection and strengthening the connection area using additional elements such as rib plates, cover plates, and flange plates to keep the plastic hinges away from the column face. This paper presents a reduced beam section approach via the introduction of multilongitudinal voids (MLV) in the beam web for various beam depths varying from 450 mm to 912 mm. ANSYS finite element program was used to simulate the three different sizes of SAC sections: SAC3, SAC5, and SAC7. Results showed an improvement in the connection ductility since the input energy was dissipated uniformly along the beam length and the total rotation of the connection was over four percent radian.

concrete strength levels, namely, of 25 and 40 MPa. Load-displacement curves, energy absorption capacities, stiffness degradation, the moment-curvature relationship, the plastic hinge mechanism and the ductility index were experimentally obtained at two different concrete types along with the measured stress-strain properties of the conventional and perlite concrete. The test results showed that the construction of the RC columns using only perlite may become possible in future by providing an adequate concrete stress-strain capacity, which will be improved.

Objective of the study is revealing developments year by year that has the faces of economical, technical, social, political and trying to clarify the relationship between different disciplines and transportation.On this context, with the affect of extension on informatics and technology on last decades, the type of development trends of transportation system is discussed within the frame of today's necessities.On this context, it is known that transportation has a mutual and integrated relationship with urbanization and it has understood that transportation is impulsion of common civilization level of humanity.In this content, development period and continuing investments of high speed railway that is a part of future perspective which is executed on the frame of development trends with economical and technological context of transportation system are evaluated detailed too.

Effectively mitigating the risks associated with sustainable development is a key problem when building in developing nations. This method requires businesses to act following moral and ethical standards while balancing financial goals. Stakeholder consensus is critical for executing sustainable risk management, which strives to reduce risks while increasing possibilities. The research focuses on sustainability concerns in Iraqi construction projects, with the primary goal of identifying reasons causing project delays using a comprehensive framework and rigorous methodology. The initial stage of the approach is gathering data from several construction sites. To assess project risks, the weighted product approach was employed, which included factor scores from prior research to create structured questionnaires that were then used to study the influence of various aspects. To establish the significance of each aspect, the relative relevance index was used, and Delphi expert consultations were held to provide additional insights. Historically, Iraq's construction sector has disregarded risk management and restrictions of finance. The project hazards were assessed using surveys, expert comments, and exploratory research. Logistic challenges were also considered in the assessment process. Microsoft Excel made performance evaluations easier, and MAT F5 obtained the highest rating for sustainable materials in WPM's risk assessment. Furthermore, equipment output has emerged as a critical aspect in guaranteeing technical compliance. This study introduces a structured risk evaluation approach for improving sustainable construction practices in developing countries.

Yer yuzunun guclu titresimlerini incelenme ve analizi yapi muhendisligi (yapi davranis analizi) ve deprem muhendisligi ( zemin davranis analizi) iki muhendislik dalinda onem tasimaktadir. Bu arastirmada faya yakin olan depremler soz konusudur. Genel olarak 15 km den yakin olan depremler faya yakin ve 15 km den uzak olan depremler faydan uzak depremler denilir. Faya yakin depremler daha yuksek frekans ve daha yuksek ivmeye sahiplerdir. Faya yakin depremler de etken suresi daha az ama daha etkilidir. Sundan dolayi rijit yapilar icin daha esnek yapilar tasarlamak gerekmektedir.

A total of four reinforced concrete (RC) columns were tested to compare the structural capacities of RC columns produced by natural perlite aggregates and conventional concrete. The structural performance of the RC columns made from natural perlite aggregates was compared to conventional RC columns regarding the same concrete strength levels, sectional properties, and reinforcement layouts of conventional RC columns. The RC columns were tested under a combined constant axial load ratio of 30% with cyclic loading for two concrete strength levels, namely, 25 and 40 MPa. Load–displacement curves, energy absorption capacities, stiffness degradation, the moment-curvature relationship, the plastic hinge mechanism, and the ductility index were experimentally obtained at two different concrete types along with the measured stress–strain properties of the conventional and perlite concrete. The test results showed that the construction of the RC columns using only perlite may become possible in the future by providing an adequate concrete stress–strain capacity, which will be improved. Additionally, the use of natural perlite aggregates can contribute to sustainable construction practices by reducing the reliance on conventional aggregates.

Adaptive road construction project Management is considered a major challenge in economic development issues. This research looks intothe many variables that can have an impact on building projects. Unfortunately, infrastructure projects in Iraq have slowed the country's progress, so effective methods of project management using actual databases are urgently needed. This research established a centralized data bank with a collection of specialized maps depicting the status of infrastructure projects in Iraq, and it also produced an advanced administrative system via effective success and failure elements that allow administration of projects. Implementing adaptive features during road construction projects is the primary problem of this study. There were two stages to the study methodology; the first was the Delphi technique, which was used to determine the first set of influential elements. The EDAS method was employed in the second approach, and it provided the most useful information regarding the aspects that could affect road construction projects positively or negatively. According to the findings, there were a number of effective factors that could lead to the failure of road construction projects. These included insufficient site security, poor site management and supervision, ineffective field management, inexperienced equipment operators, and insufficient consultant experience. The findings may be helpful for the policy makers and the practitioners in future.

Bu çalışmada taş dolgu dalgakıranlarda çeşitli eğimler için farklı dalga yükseklikleri ve su derinliklerinde dalgakıran kesitleri hazırlanmıştır. Hazırlanan kesitler çekirdek tabakası, çift sıra filtre tabakası ve çift sıra düzenli yerleştirilmiş koruma tabakasından oluşmaktadır. Dalgakıran kesitlerinde Hudson bağıntısı kullanılarak koruma tabakasındaki blok ağırlıkları ve kullanılacak elemanların seçimi yapılarak maliyetler hesaplanmıştır. Maliyetler arasındaki farklar yapı eğimi, su derinliği, dalga kırılma durumu ve dalga yüksekliği gibi parametrelere bağlı olarak değerlendirilmiştir. Yapı eğimindeki artış stabilite üzerinde olumlu etkiye sahipken, proje dalga yüksekliğindeki artış olumsuz etki göstermektedir. Su derinliği ve proje dalga yüksekliği yanında dalgakıran eğimi de maliyetler üzerinde önemli bir etkiye sahiptir. Ayrıca, aynı tasarım koşullarında dalgakıranların kafa kısmındaki koruma tabakası ağırlığının gövdedekinden daha yüksek olduğu görülmektedir. Buradan dalgakıranların kafa kısmının daha hassas olduğu anlaşılmaktadır.

This research is carried out to investigate and assess the critical role of soil properties and their content in influencing the soil liquefaction phenomenon that takes place when an earthquake happens. A case study is taken into account in this work, representing the Karakaya Dam. Two research approaches were implemented to achieve the research goal, including extrapolation in Excel and numerical optimization using linear regression. The outputs revealed that the annual temperature in the future of zones around the Karakaya Dam, including Azami, Ortalama, and Asgari, would witness a moderate increase of about 3 to 6 degrees Celsius next decade. Moreover, the research confirmed that the Euphrates River discharge rate at the Karakaya Dam would witness a significant increase from (100-350 m3) to (2,590-2,640 m3) in 2029, explaining that temperature and discharge rate may influence the liquefaction. Meanwhile, the research outputs indicated that soil temperature under the Karakaya Dam and chemical elements would not variate significantly next decade. Notwithstanding, the pH number will change widely from 4.14 to 9.74 in 2029. Besides, the most significant chemical molecule concentration in the soil under the Karakaya Dam is the phosphite anion, corresponding to a minimum and maximum concentration of 1 and 2 μg/m2, respectively.

Building Information Modeling (BIM) has brought about a qualitative change in the design and management of construction projects because it represents a digital simulation of the physical characteristics of the building, and this increases its efficiency before the actual construction begins. In Iraq, most construction projects still use CAD two-dimensional drawing for the purpose of the implementation process, especially government projects, and this causes many problems due to the difficulty of communication between the various disciplines involved in the design and misunderstanding during implementation. This type of problem is reduced by combining BIM drawings prepared by designers and making them into a single model. In this process of merging conflicts are found using BIM tools such as Autodesk Navisworks. There are three main types of detections. This article includes how a clash detector can help improve clashes in the design phase before starting to construct a specific building using BIM applications and focuses on hard detection type (overlap of a particular element with else). The methodology involved in this research is to study an educational building (24-classroom model school) consisting of structural and architectural BIM models only, clash detection analysis is done using Autodesk Revit and Autodesk Navisworks Manage software.

Cost estimating entails gathering and evaluating historical data, as well as using quantitative models, methodologies, tools, and databases to forecast the cost of a program in the future. At the early stages of the building design process, the cost is considered one of the most important elements in making decisions. During the design phase of a project, cost estimating is quite essential. To compelet a construction project successfully, it is critical to design a usable model and method for cost estimation in construction projects. For the above reason, this study has developed a hybrid method to conduct an accurate cost estimation in construction projects in Iraq. This study also conducted a rigorous survey to find five main influential factors with thirty-six sub-factors in the Iraqi market. It was evaluated through previous studies, questionnaires, and surveys of twenty projects to build a matrix factors database for construction projects. This work gathered the construction cost factors from relevant research and expert views. In the second step, the researcher ranked the factors within the Importance Regression Ensemble Method then the K-Nearest Neighbor Method was applied to specify the effect of the near-effective factors on the cost. The outcome of this study will be helpful to construction professionals in estimating a construction project effectively.

Wave propagation in unbounded domains is one of the important engineering problems. There have been many attempts by researchers to solve this problem. This paper intends to shed a light on the finite point method, which is considered as one of the best methods to be used for solving problems of wave propagation in unbounded domains. To ensure the reliability of finite point method, wave propagation in unbounded domain is compared with the sinusoidal unit point stimulation. Results indicate that, in the case of applying stimulation along one direction of a Cartesian coordinate, the results of finite point method parallel to the stimulation have less error in comparison with the results of finite element method along the same direction with the same stimulation.

Afghanistan is encountering a massive compete in arrangement of old infrastructure. Specially for roads structure, it is found that many roads pavements built 30 to 40 years ago and now it is the end of their life. Other roads had been deteriorated because of misuse, overuse and mismanagement and also after more than 3 decades of conflict Afghanistan encountered keen challenges in rehabilitation and reconstruction of the roads. In addition, present and future threats influence the wished mission of these pavements for fast, safe and comfort transportation of people and goods. Moreover, the current management shows that the system is being used now is not flexible enough to consider on the changing conditions and is poor to assist in making decisions.This study aims to initiate a Pavement Management System by providing an organized procedure of maintaining, reconstructing, and operating the roads pavements and to utilize in a better flexible strategy that can enable this research to perform better tasks, more economically, higher quality and do it such a manner to achieve a desired result.A system has been also presented to help and make easier the decision making process. It is Micro PAVER pavement software. Micro PAVER is a Pavement Management System developed by the US Army Corps of Engineers. Micro PAVER provides pavement management capabilities to:· Organize and develop the pavement list.· Analyze the running condition of pavements.· Develop methods to forecast future conditions report on past and future pavement execution; and· Develop plots for pavement maintenance based on condition needs or budget. Therefore, in order to have a good management system, this system will be preferred which provide an organized method of maintenance, reconstruction and operation of the roads pavements. And the system will be flexible enough and assists in making decisions.

This study aimed to investigate the precast reinforced concrete beam-to-column joints behaviors through the replaceable damper under cyclic loading. The precast concrete specimens have been embedded with steel reinforcement and specially shaped connectors. After the application of the replaceable damper under cyclic loading, the energy dissipation part has acted very well and increased the bearing capacity of precast specimens. The precast concrete beam–to–column joints were designed and analyzed to compare with the reinforced concrete (RC) specimen. The analysis result of the loading based on the controlled displacement method has illustrated that the precast specimen model with damper has shown a greater hysteric behavior than the RC frame. the PS-1 is passed the 2.8% chord rotation approximately, which showed better performance, and higher resistance than the RC specimen. The efficiency of the PS–1 specimen with a special connection has been elaborated with the finite element method (FEM) and simulated by ABAQUS software.

Columns in structures are an indispensable issue. However, the challenge is how can specify a suitable shape of column that can bear the highest weight under simplest conditions. This study investigates a set of column shapes for building structure that can be practically applied in different sizes to discover their properties. The ANSYS program is used to discover these properties, which included two basic stages in the testing processes. The first stage is to find the amount of displacement in each type of column under the lateral forces, and the second stage is to find the column’s behaviour under vibrations which is called the Mode. The results observed that the traditional reinforced concrete columns can be improved in performance by using specially designed columns that operate as a succedaneum. The special-shaped concrete column (featuring L-shaped or T-shaped column sections) performs exceptionally well. Also, Modal analysis, or mode-superposition methodology, presented a unique individual response of special-shaped concrete column that characterizes displacement designs by assessing and superimposing mode forms.

Objective: To express the usage of intelligent concepts in the architectural building construction field that are primarily concerned with reducing building energy use. Improved energy-saving methods and the use of environmentally friendly design principles are essential in this field. This type of managerial decision-making is necessary for the success of these types of projects. Methods: monitoring the performance of intelligent buildings use the cost variance (CV) and schedule variation as standard metrics to track the progress of a project based on the save energy concept. Also, this research conducted a comparative study on Building Information Modelling (BIM) and (MCDM) decision-making limitations as presented in the article. Analysis: the conventional technique, on the other hand, is unable to offer data on variance from typical performance levels. The main point based on Delphi results of construction cost variables has been observed 19 effective factors. Finding and Novelty: The RII observed that the most effective aspects of an intelligent building are the number of floors in the building, the kind of structural design, and the size of the shadow cast on the surface of the building. The Multi-Criteria Decision Maker (MCDM) observed significant differences in planned value (PV) and actual value (AC) results. In addition, as a result of the current approach, it is possible to track project costs and timelines more precisely. Doi: 10.28991/CEJ-2023-09-01-010 Full Text: PDF