@article{AlBalkhyKarmaouiDucoulombieretal., author = {AlBalkhy, Wassim and Karmaoui, Dorra and Ducoulombier, Laure and Lafhaj, Zoubeir and Linner, Thomas}, title = {Digital twins in the built environment: Definition, applications, and challenges}, series = {Automation in Construction}, volume = {162}, journal = {Automation in Construction}, publisher = {Elsevier}, doi = {10.1016/j.autcon.2024.105368}, abstract = {Digital Twins (DT) implementation in the Built Environment (BE) industry is still in its early stages. Aiming to increase the knowledge about DT, this study analyzes how DT can be understood in the BE sector and investigates its different potential benefits and expected challenges. To do so, the Systematic Literature Review (SLR) approach was employed. Using 228 publications, the current study presents a proposed definition and structure for DT systems. The proposed structure is based on four main layers: physical, digital, application, and user layers. The study also classified the applications of DT into six groups: sustainability and environmental, facility management, safety, health, and risk management, structural performance, construction management, and architectural and urban-related applications. The challenges of DT implementation were also grouped based on industry-related, social and organizational, economic, technological, and political and legal challenges. Based on the results, future research directions and practical recommendations were presented to support the successful deployment of the technology.}, language = {en} } @inproceedings{AlbalkhyHernandezValeraKarmaouietal., author = {Albalkhy, Wassim and Hernandez Valera, Elias and Karmaoui, Dorra and Lafhaj, Zoubeir and Linner, Thomas and Ayadi, Syrine and Zerrari, Reda and Boutabba, Assia}, title = {Motives and Barriers for Offsite and Onsite Construction 3D Printing}, series = {Proceedings of the 41st International Symposium on Automation and Robotics in Construction. - Lille, France. - 6/3/2024 - 6/5/2024}, booktitle = {Proceedings of the 41st International Symposium on Automation and Robotics in Construction. - Lille, France. - 6/3/2024 - 6/5/2024}, editor = {Gonzalez-Moret, Vicente and Zhang, Jiansong and Garc{\´i}a de Soto, Borja and Brilakis, Ioannis}, publisher = {International Association for Automation and Robotics in Construction (IAARC)}, issn = {2413-5844}, doi = {10.22260/ISARC2024/0154}, pages = {1190 -- 1197}, abstract = {This study aims to compare between onsite and offsite construction 3D printing (C3DP). For this purpose, the Systematic Literature Review approach (SLR) was employed. The review which was based on studying 48 sources identified six categories to classify the motives and barriers for the two C3DP techniques; cost, transportation, design flexibility, workers and materials, production process, and environmental considerations. The literature identified the cost as the main factor that influences the choice between the two techniques. The presented list of motives and barriers is helpful to support decision-making in C3DP projects.}, language = {en} }