TY - JOUR A1 - AlBalkhy, Wassim A1 - Karmaoui, Dorra A1 - Ducoulombier, Laure A1 - Lafhaj, Zoubeir A1 - Linner, Thomas T1 - Digital twins in the built environment: Definition, applications, and challenges JF - Automation in Construction N2 - 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. KW - Digital Twins (DT) KW - Digital technologies KW - Built Environment (BE) KW - Construction KW - Construction 4.0 Y1 - 2024 U6 - https://doi.org/10.1016/j.autcon.2024.105368 VL - 162 PB - Elsevier ER - TY - CHAP A1 - Albalkhy, Wassim A1 - Hernandez Valera, Elias A1 - Karmaoui, Dorra A1 - Lafhaj, Zoubeir A1 - Linner, Thomas A1 - Ayadi, Syrine A1 - Zerrari, Reda A1 - Boutabba, Assia ED - Gonzalez-Moret, Vicente ED - Zhang, Jiansong ED - GarcĂ­a de Soto, Borja ED - Brilakis, Ioannis T1 - Motives and Barriers for Offsite and Onsite Construction 3D Printing T2 - Proceedings of the 41st International Symposium on Automation and Robotics in Construction. - Lille, France. - 6/3/2024 - 6/5/2024 N2 - 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. KW - Additive Manufacturing KW - 3D Printing KW - Construction Management KW - Modular Construction KW - Offsite Construction KW - Literature Review Y1 - 2024 U6 - https://doi.org/10.22260/ISARC2024/0154 SN - 2413-5844 SP - 1190 EP - 1197 PB - International Association for Automation and Robotics in Construction (IAARC) ER -