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Publications (8 of 8) Show all publications
Muhammad, A. A., Yitmen, I., Alizadehsalehi, S. & Celik, T. (2020). Adoption of Virtual Reality (VR) for Site Layout Optimization of Construction Projects. Teknik Dergi, 31(2)
Open this publication in new window or tab >>Adoption of Virtual Reality (VR) for Site Layout Optimization of Construction Projects
2020 (English)In: Teknik Dergi, ISSN 1300-3453, Vol. 31, no 2Article in journal (Refereed) Published
Abstract [en]

Among the significant tasks of construction site management, site layout planning is a crucial activity which leads to project success. Currently the concept of an optimized construction site layout emerge as a result of executing tools and techniques that construction project management discipline provides. Despite the plentiful existence of site layout techniques, the authors of this paper believe that incorporation of Virtual Reality (VR) for jobsite organization is a valuable and modern management phenomenon for optimal planning of the site layout planning.  Therefore, the purpose of this paper is to assess traditional practices for site layout planning and introduce the application of VR in construction jobsite organizations involving site layout planning, collision detection and evaluation of construction site layout scenarios. In this paper, two different construction jobsite scenarios for the structural phase of the building construction are created and for optimization purposes implemented through the 3D model developed are on Autodesk Revit software, SketchUp and Lumion. VR box headset is used for testing purposes of the proposed 3D jobsite organization model. A descriptive case study is examined in order to describe the proposed organizational plan for the created scenarios. In this research, questionnaire survey is chosen as one of the research instrument for data collection and evaluation purposes. Results presented in this paper, provide industry professionals with a better understanding of the benefits, advantages and how VR technology improves the effectiveness of jobsite layout planning compared to traditional practices. 

Place, publisher, year, edition, pages
TüRk MüHendi̇S Ve Mi̇Mar Odalari Bi̇Rli̇ğİ, 2020
Keywords
Virtual reality, site layout plan, construction industry, jobsite organisation, 3D model
National Category
Construction Management
Identifiers
urn:nbn:se:hj:diva-43427 (URN)10.18400/tekderg.423448 (DOI);JTHByggnadsteknikIS (Local ID);JTHByggnadsteknikIS (Archive number);JTHByggnadsteknikIS (OAI)
Available from: 2019-04-05 Created: 2019-04-05 Last updated: 2019-08-19
Ozturk, G. B. & Yitmen, I. (2019). Conceptual Model of Building Information Modeling Usage for Knowledge Management in Construction Projects. In: M. Drusa, I. Yilmaz & M. Marschalko (Ed.), IOP Conf. Series: Materials Science and Engineering: . Paper presented at 3rd World Multidisciplinary Civil Engineering, Architecture, Urban Planning Symposium (WMCAUS 2018) (pp. 1-11). Institute of Physics Publishing (IOPP), 471, Article ID 022043.
Open this publication in new window or tab >>Conceptual Model of Building Information Modeling Usage for Knowledge Management in Construction Projects
2019 (English)In: IOP Conf. Series: Materials Science and Engineering / [ed] M. Drusa, I. Yilmaz & M. Marschalko, Institute of Physics Publishing (IOPP), 2019, Vol. 471, p. 1-11, article id 022043Conference paper, Published paper (Refereed)
Abstract [en]

Knowledge management (KM) draws on a vital role in highly participatory and diversified working environment of construction projects. Knowledge keeps construction firms competitive and boosts performance high in future work. However, large and chaotic projects require KM achieved with technological support thorough the project life cycle. Building information modelling (BIM) has a wide range of interaction between researchers and practitioners as a new and promising area of technological research and implementation in construction. In the last decade, many researchers worked on the use of BIM in the construction industry. Collaborative interaction is one of the most important promises of BIM. Collaboration between construction professionals can be improved by firmly managed project knowledge. With BIM solutions, it can be easier to externalize, integrate, internalize and socialize knowledge. Operational knowledge and strategic knowledge can be managed through interactive BIM models. This study aims suggesting a conceptual model representing KM process through BIM. A comprehensive literature review on KM and BIM was established to construct the theoretical framework for the assignment of a conceptual model for BIM usage in KM process of construction projects. The proposed conceptual model is a road map for adapting KM process with BIM as a new KM tool. The ability of BIM to manage knowledge is determined. KM process is identified for construction projects. Existing process is reviewed and modified for the BIM usage. In future studies, empirical research will be conducted to strengthen the validation of the proposed model.

Place, publisher, year, edition, pages
Institute of Physics Publishing (IOPP), 2019
Series
IOP Conference Series: Materials Science and Engineering, ISSN 1757-8981, E-ISSN 1757-899X ; 471
Keywords
Building Information Modelling, Knowledge Management, Construction Projects
National Category
Construction Management
Identifiers
urn:nbn:se:hj:diva-43311 (URN)10.1088/1757-899X/471/2/022043 (DOI)000465811800043 ()2-s2.0-85062466860 (Scopus ID)
Conference
3rd World Multidisciplinary Civil Engineering, Architecture, Urban Planning Symposium (WMCAUS 2018)
Available from: 2019-03-09 Created: 2019-03-09 Last updated: 2019-06-07Bibliographically approved
Erkul, M., Yitmen, I. & Celik, T. (2019). Dynamics of stakeholder engagement in mega transport infrastructure projects. International Journal of Managing Projects in Business/Emerald
Open this publication in new window or tab >>Dynamics of stakeholder engagement in mega transport infrastructure projects
2019 (English)In: International Journal of Managing Projects in Business/Emerald, ISSN 1753-8378, E-ISSN 1753-8386, ISSN 1753-8378Article in journal (Refereed) Epub ahead of print
Abstract [en]

Purpose – The purpose of this paper is to investigate the practice of stakeholder engagement as a social network dynamics for stakeholder satisfaction and project success in the lifecycle of mega transport infrastructure projects (MTIPs).

Design/methodology/approach – Hypotheses indicating the positive relationships between stakeholders’ effective attributes, stakeholder engagement as social network dynamics and project success through stakeholders’ satisfaction have been developed. Based on a questionnaire survey and semi-structured interviews, responses have been gathered from the representative groups and organizations on their social network dynamics for their satisfaction and project success. A hypothesized structural equation model has been tested using AMOS statistical software package.

Findings – The analysis highlighted the engagement of the stakeholders within the strategic intents of the project with the public needs and expectations. The model depicts the processes of building social network models based on the capturing of the project’s data in relation to the stakeholders’ communication and satisfaction across the key issues for success in the lifecycle of MTIP.

Practical implications – The model is applicable on most MTIP with a diverse stakeholder base and the underlying complexity associated with the community participation and consultation processes. The model will also support wider stakeholder engagement in the planning of MTIP with optimal operationalization and service delivery from a community perspective.

Originality/value – The research involves an approach for rationalizing the stakeholder engagement policies of the MTIPs by providing an empirically grounded model simultaneously linking various aspects of stakeholder effective attributes, stakeholder engagement and their relationships to stakeholder satisfaction and project success in MTIPs.

Place, publisher, year, edition, pages
Emerald Group Publishing Limited, 2019
Keywords
Megaprojects, Stakeholder engagement, Project success
National Category
Construction Management
Identifiers
urn:nbn:se:hj:diva-45559 (URN)10.1108/IJMPB-09-2018-0175 (DOI)2-s2.0-85070367433 (Scopus ID);JTHByggnadsteknikIS (Local ID);JTHByggnadsteknikIS (Archive number);JTHByggnadsteknikIS (OAI)
Available from: 2019-08-14 Created: 2019-08-14 Last updated: 2019-08-19
Movaffaghi, H., Pyykkö, J., Yitmen, I. & Svensson, S. (2019). Large Span Timber Buildings Under Horizontal Forces. In: : . Paper presented at CIVIL-COMP 2019, The Sixteenth International Conference on Civil, Structural and Environmental Engineering Computing 16-19 September 2019, Lake Garda, Italy. Italy: Elsevier, 1
Open this publication in new window or tab >>Large Span Timber Buildings Under Horizontal Forces
2019 (English)Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

In timber concrete composite (TCC) floor systems the concrete contributes to increase of the stiffness and research is ongoing to develop large span TCC floor systems with less supporting walls to create both modular flexibility and wide-open spaces. Nevertheless, removing supporting walls can degrade structural performance against horizontal forces (Ferdous, et al., 2019). Meanwhile both the height of the structure and the type of floor diaphragm (rigid or flexible) has influence on the magnitude of the lateral loads transferred to the supporting shear walls. This is a challenge, not least when prefabricated elements are used; the individual elements have to be connected to form a continuous floor diaphragm.

The main aim of this paper is to study lateral load transferred to the shear walls through the TCC floor with both rigid and/or flexible diaphragms in low and medium-rise timber buildings. The focal point of the study is the analysis and design of floor elements and connection systems connecting the TCC floor elements to each other as well as to the adjoining structure.

The case studies for low and medium-rise timber structures have been analyzed both using finite element modelling and analytical methods based on both deep beam theory and beam or diaphragm actions depending on the height of the structure. The results in this study indicate that the magnitude of load transferred to the shear walls depends on both the height of the structure and the type of floor diaphragms. The structural performance in terms of stability can be enhanced by effective use of connection systems of TCC floor elements.

Place, publisher, year, edition, pages
Italy: Elsevier, 2019
Keywords
timber concrete composite floor, large span, horizontal forces, low and medium-rise timber structures.
National Category
Engineering and Technology
Identifiers
urn:nbn:se:hj:diva-46378 (URN)
Conference
CIVIL-COMP 2019, The Sixteenth International Conference on Civil, Structural and Environmental Engineering Computing 16-19 September 2019, Lake Garda, Italy
Available from: 2019-09-26 Created: 2019-09-26 Last updated: 2019-09-26Bibliographically approved
Movaffaghi, H., Pyykkö, J. & Yitmen, I. (2019). Multi-Objective and Multi-Criteria Approach for Value-Driven Design in Industrialized Residential Multi-Storey Timber-Building. In: Thomas K. Bader, Josef Füssl, Anders Olsson (Ed.), Computational Methods in Wood Mechanics – from Material Properties to Timber Structures.: . Paper presented at Compwood 2019 International Conference on Computational Methods in Wood Mechanics – from Material Properties to Timber Structures.ECCOMAS Thematic Conference, June 17-19, 2019, Växjö, Sweden.. Växjö
Open this publication in new window or tab >>Multi-Objective and Multi-Criteria Approach for Value-Driven Design in Industrialized Residential Multi-Storey Timber-Building
2019 (English)In: Computational Methods in Wood Mechanics – from Material Properties to Timber Structures. / [ed] Thomas K. Bader, Josef Füssl, Anders Olsson, Växjö, 2019Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

Serviceability in terms of springiness, vibration and deflection [1], as well as sustainability in terms of climate impact and costs [2] have been identified as the most important aspects for appropriate functioning in residential multi-storey timber-buildings. Thus, the aim of this study is focused on product development of a timber-concrete composite (TCC) floor system by 1) enhancing serviceability performances of the floor for larger spans (above 6 m) in terms of stiffness and dynamic response, and 2) reducing both climate impact (CO2-emissions) and costs, by optimizing material usage. As the case study a timber structure of a residential multi-storey building, including concrete ground floor and shaft, with the overall dimensions ܮൈܹൈܪൌ30ൈ11ൈ14 ሾ݉ଷሿ has been studied. The geometry of the load bearing structural elements has been modelled using finite element programs. As serviceability criteria for the floors, the deflection due to a point load was chosen. The deflections were related to comfort classes given in [3] and transverse load distribution was taken into account according to [4]. The deflection and effective bending stiffness (EIef in EC5 Annex B) were chosen as objective functions, while thickness of concrete slab and shear stiffness of the connection between glulam beam and concrete slab were chosen as design variables in a multi-objective optimization. The relationship between connection stiffness and height of the concrete slab for comfort class B can be seen in Figure 1. In the figure the cross-section of the TCC floor structure, with a span of 7.5 m, is also depicted. Figure 1: Connection stiffness-concrete thickness relationship and cross-section for the TCC floor. After optimization, a multi-criteria analysis was applied to select a design solution from the Pareto optimal front, satisfying some subjective preferences of the stakeholders for value-driven design. The results in this study integrates serviceability, environmental and economic performances for value-driven design and supports decision making in the early phases of a project, where various alternatives can be analyzed and evaluated. 

Place, publisher, year, edition, pages
Växjö: , 2019
Keywords
Multi-Objective, Multi-Criteria, Value-Driven Design, Industrialized Residential Multi-Storey Timber-Building
National Category
Building Technologies
Identifiers
urn:nbn:se:hj:diva-45574 (URN)open.lnu.se/index.php/compwood (DOI)978-91-88898-64-7 (ISBN)
Conference
Compwood 2019 International Conference on Computational Methods in Wood Mechanics – from Material Properties to Timber Structures.ECCOMAS Thematic Conference, June 17-19, 2019, Växjö, Sweden.
Available from: 2019-08-15 Created: 2019-08-15 Last updated: 2019-08-19Bibliographically approved
Tezel, A., Papadonikolaki, E., Yitmen, I. & Hilletofth, P. (2019). Preparing Construction Supply Chains for Blockchain: An Exploratory Analysis. In: : . Paper presented at CIB World Building Congress 2019 Constructing Smart Cities, Hong Kong SAR, China, 17 – 21 June 2019. , 6
Open this publication in new window or tab >>Preparing Construction Supply Chains for Blockchain: An Exploratory Analysis
2019 (English)Conference paper, Published paper (Refereed)
Abstract [en]

Blockchain, a peer-to-peer controlled, distributed database structure, has the potential to profoundly affect the current business transactions in the construction industry through smart contracts, cryptocurrencies, and reliable asset tracking. The construction industry has often been criticized for being slow in embracing emerging technologies and not effectively diffusing those technologies through its supply chains. Often, the extensive fragmentation, traditional procurement structures, destructive competition, lack of collaboration and transparency, low-profit margins and human resources are shown as the main culprits for this. As Blockchain makes its presence felt strongly in many other industries like finance and banking, this paper investigates how to prepare construction supply chains for Blockchain technology through an explorative analysis. Empirical data for the study were collected through semi-structured interviews with 17 subject experts. Alongside presenting a SWOT (strengths, weaknesses opportunities, threats) analysis, the paper exhibits the requirements for and steps toward a construction supply structure facilitated by Blockchain.

Keywords
Blockchain, Smart Contract, Supply Chain Management, Project Management, SWOT
National Category
Engineering and Technology
Identifiers
urn:nbn:se:hj:diva-44671 (URN)
Conference
CIB World Building Congress 2019 Constructing Smart Cities, Hong Kong SAR, China, 17 – 21 June 2019
Projects
The research project “Toward Blockchain-enabled Construction Supply Chains: Potential, Requirements and Implementation” funded by the Centre for Digital Built Britain, under InnovateUK grant number 90066.
Available from: 2019-06-19 Created: 2019-06-19 Last updated: 2019-06-25
Yucelgazi, F. & Yitmen, I. (2019). Risk Assessment for Large-Scale Transport Infrastructure Projects. In: M. Drusa, I. Yilmaz & M. Marschalko (Ed.), IOP Conference Series: Materials Science and Engineering: . Paper presented at 3rd World Multidisciplinary Civil Engineering, Architecture, Urban Planning Symposium (WMCAUS 2018) (pp. 1-10). Institute of Physics (IOP), 471, Article ID 022005.
Open this publication in new window or tab >>Risk Assessment for Large-Scale Transport Infrastructure Projects
2019 (English)In: IOP Conference Series: Materials Science and Engineering / [ed] M. Drusa, I. Yilmaz & M. Marschalko, Institute of Physics (IOP), 2019, Vol. 471, p. 1-10, article id 022005Conference paper, Published paper (Refereed)
Abstract [en]

The identification of risks in the planning phase of a project and the arrangement of impact values has become a fundamental basis of today's various construction projects. Despite robust and well-planned projects, unexpected problems will likely emerge in any stage of the project if possible risks are not identified and assessed beforehand. Therefore, this process has become a requisite in increasing the success as well as minimizing the problems of a project. Large-scale transport infrastructure projects (LSTIPs), technologically equipped projects, meet the essential needs of the recent era but also bring about numerous risks such as financial, technical, managerial, political, economic, natural or legal. Hence, being exposed to such risks in the planning and construction stage of LSTIPs, could lead to negative consequences in the fate of the project. This study aims to develop a conceptual framework which provides a pathway for the planning phase and to offer risk lists and their priority orders that reinforce the construction phase. These aims were achieved by identifying the risk factors that could arise in European and Middle Eastern LSTIPs and detecting significances of the risks according to these types of projects. Data collection was performed through a substantial review of literature and a questionnaire conducted to contracting firms and civil engineering consultancies operating in Europe and the Middle East. According to the findings, the comparison between the leading risks encountered in European and in Middle Eastern LSTIPs revealed that two of the regions were confronted with both similar and different risks. Europe and the Middle East's foremost common risk factor is the financial strength of the client listed under the financial category. When regions are considered individually, Europe gives prior importance to the resource availability risk factor in the economic category whereas increased material cost located under the same category is the primary risk factor for the Middle East. As a result, the data obtained from this research study could be deployed as a standardized risk list in the planning stage of forthcoming LSTIPs as well as a guideline for the assessment phase of priority orders. Furthermore, this study suggests a further and detailed investigation on mitigating risks that occur in LSTIPs.

Place, publisher, year, edition, pages
Institute of Physics (IOP), 2019
Series
IOP Conference Series: Materials Science and Engineering, ISSN 1757-8981, E-ISSN 1757-899X ; 471
Keywords
Risk Assessment, Large-Scale Transport Infrastructure Projects
National Category
Construction Management
Identifiers
urn:nbn:se:hj:diva-43193 (URN)10.1088/1757-899X/471/2/022005 (DOI)000465811800005 ()2-s2.0-85062479092 (Scopus ID)
Conference
3rd World Multidisciplinary Civil Engineering, Architecture, Urban Planning Symposium (WMCAUS 2018)
Available from: 2019-02-23 Created: 2019-02-23 Last updated: 2019-06-07Bibliographically approved
Movaffaghi, H. & Yitmen, I. (2018). Developing a framework of a multi-objective and multi-criteria based approach for integration of LCA-LCC and dynamic analysis in industrialized multi-storey timber construction. In: I. Mutis & T. Hartmann (Ed.), Advances in Informatics and Computing in Civiland Construction Engineering: Proceedings of the 35th CIB W78 2018 Conference: IT in Design, Construction,and Management, Chicago, 01-03 October 2018. Paper presented at 35th CIB W78 2018 Conference: IT in Design, Construction,and Management, Chicago, 01-03 October 2018. (pp. 447-454). Cham, Switzerland: Springer, 1, Article ID 53.
Open this publication in new window or tab >>Developing a framework of a multi-objective and multi-criteria based approach for integration of LCA-LCC and dynamic analysis in industrialized multi-storey timber construction
2018 (English)In: Advances in Informatics and Computing in Civiland Construction Engineering: Proceedings of the 35th CIB W78 2018 Conference: IT in Design, Construction,and Management, Chicago, 01-03 October 2018 / [ed] I. Mutis & T. Hartmann, Cham, Switzerland: Springer, 2018, Vol. 1, p. 447-454, article id 53Conference paper, Published paper (Refereed)
Abstract [en]

To improve organizational decision-making process in construction industry, a framework of a multi-objective andmulti-criteria based approach has been developed to integrate results from Life-Cycle Analysis (LCA), Life-Cycle CostAnalysis (LCC) and dynamic analysis for multi-storey industrialized timber structure. Two Building InformationModelling (BIM)-based 3D structural models based on different horizontal stabilization and floor systems will beanalyzed to reduce both climate impact, material and production costs and enhance structural dynamic response of thefloor system. Moreover, sensitivity of the optimal design will also be analyzed to validate the design. The multi-objectiveand multi-criteria based LCA-LCC framework analyzing the environmental, economic, and dynamic performances willsupport decision making for different design in the early phases of a project, where various alternatives can be created andevaluated. The proposed integrated model may become a promising tool for the building designers and decision makers inindustrialized timber construction.

Place, publisher, year, edition, pages
Cham, Switzerland: Springer, 2018
Keywords
LCA, LCC, Multi criteria, Multi-objective, BIM, Timber Structures
National Category
Construction Management
Identifiers
urn:nbn:se:hj:diva-41890 (URN)10.1007/978-3-030-00220-6_53 (DOI)978-3-030-00219-0 (ISBN)978-3-030-00220-6 (ISBN)
Conference
35th CIB W78 2018 Conference: IT in Design, Construction,and Management, Chicago, 01-03 October 2018.
Projects
Multi-criteria analysis for Sustainable Construction Process focusing on climate impact and construction costs
Available from: 2018-10-24 Created: 2018-10-24 Last updated: 2018-11-06Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-4288-9904

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