Digital twins in infrastructure: definitions, current practices, challenges and strategies

When combined with information and communication technologies and powerful data analytic algorithms such as artificial intelligence, digital twins enable organisations to conserve physical resources. This applies both during the design phase and when performing diagnostic and predictive analyses during operations. These abilities bring significant opportunities to the infrastructure industry to develop new ways of designing, constructing, operating and monitoring infrastructure at a time when much of the world’s civil infrastructure is ageing and showing signs of deterioration. This study aims to find out how digital twins can help the infrastructure industry to deliver and operate sustainable and smart infrastructure assets. This paper presents an overview of digital twin definitions, current practices, benefits and challenges through a series of semi-structured expert interviews with executives from the UK infrastructure industry. Additionally, it suggests a series of strategies to aid digital transformation and digital twin adoption in the industry. Results from the interviews illustrated that the executives involved in digital transformation in the infrastructure industry are very well aware of the definitions, benefits and challenges of digital twins. In general, they understand the value of digital transformation and specifically digital twins. They know the reasons behind the need for transforming the industry and adopting data-driven concepts such as digital twins. Moreover, the executives interviewed as part of this study mentioned common challenges across different infrastructure domains. The strategies presented are focused on addressing these three main challenges identified and agreed upon by the participants–culture, technology adoption and lack of a skilled workforce. The three main strategies, addressing digital transformation (1), cultural transformation (2) and bridging the skills gap (3), are explained later in this paper. The article concludes by underlining the importance of creating equal opportunities for the current workforce to improve their digital fluency and skillset by providing information about the benefits of digital twins throughout the sector and organisations to improve adoption and the realisation of benefits.</p

Old wine in new bottles? Understanding infrastructure resilience: Foundations, assessment, and limitations

While the trend towards building resilience in infrastructure systems for disaster risk reduction is accelerating, the application of infrastructure resilience is largely conceptual or an embellishment to established modelling techniques. In response, this paper sets out the theoretical foundations of infrastructure resilience, which broadly applies across critical infrastructure networks. This is followed by reviewing system-based and network-based approaches to resilience assessment with a focus on transport infrastructure, where there is an emerging body of studies. It spotlights critical issues in conflating resilience with other concepts of infrastructure safety management or merely tagging resilience on established methods, indicating a phenomenon of “old wine in new bottles”. Also, oversimplifying disruption scenarios does not provide a sufficient basis for informed resilience planning. This paper reminds readers to look beyond resilience as a mere buzzword and offers guidance on how to do so by recognising the theoretical and methodological cornerstones of infrastructure resilience.</p

Pile defect assessment using distributed temperature sensing: fundamental questions examined

Thermal integrity testing has been successfully used to assess the quality of cast-in-place piles for the past decade. It employs temperature data measured during concrete curing to identify defects along the piles’ length. However, the uptake of this technology has been rather limited in the piling industry. The main concerns are that the method is not standardised and its reliability is not well understood. In order to address these, there are a number of fundamental questions that need to be explored in more detail, including (a) the optimum time to conduct the assessment, (b) the defect thermal impact, (c) the zone of influence on temperature sensors, (d) the minimum detectable size of a defect and (e) the associated optimum sensor location required. In this paper, experimental and numerical studies were conducted to examine these questions. Fibre optic sensors were employed on model concrete piles in laboratory tests to provide fully distributed temperature data throughout the curing process. The test results showed that the optimum time to assess the defects is approximately at 60% of the time to reach peak temperature and the minimal detectable defect size, using the currently available optical fibre sensor technology, is 4% of the cross-sectional area. In addition, the thermal influence of different defect sizes is presented. Following this, it is shown in the paper that the minimum numbers of sensor cables required to identify defects with cross-sectional areas of 4%, 5% and 8% are eight, six and four cables, respectively. The optimum layout of these sensor cables within a pile cross-section has also been discussed. When specifying pile instrumentation for integrity assessment, the findings of this paper enable practising engineers to make informed judgements in relation to the size of defects they would like to detect (and hence the associated risk this entails) together with the corresponding instrumentation layout required.</p

Leadership for responsible digital innovation in the built environment: A socio-technical review for re-establishing competencies

Digitalisation in cities offers new opportunities and challenges for city planners and managers to re-shape their roles and create public value through responsible innovation. However, there is a lack of understanding of the competency requirements to foster leadership capacity for digital innovation with social coherence and responsibility. Based on a socio-technical perspective, this paper presents a multi- and inter-disciplinary framework to identify and evaluate the competencies necessary for leading digital innovation in the built environment. The framework incorporates three dimensions: digital and technical, governance and management, and ethical and responsible innovation. A review of existing competency frameworks for digitalisation in the urban built environment is presented to identify competency gaps across the three dimensions. The results show that existing frameworks rarely strive for comprehensiveness and are limited in their scope to certain competencies along a single dimension. In addition, studies addressing the need for multi- and inter-disciplinary competencies across the three dimensions are lacking. The paper thus demonstrates that our three-pronged framework is a useful and much needed tool to identify competency requirements for local public, private and community stakeholders to steer place-based digital innovation and ensure public value creation.</p

Designing user-centric transport strategies for urban road space redistribution

Cities worldwide are geared to promote economic growth, improve accessibility, address environmental issues, and enhance the quality of life. However, the processes that lead to the design of urban roads, particularly the space distribution, reflect the inequalities existing in the fabric of our society. Motorists often have shorter travel time and more space than passengers of other modes. Furthermore, the existing transport appraisal and planning tools that frame sustainable transport policies fall short of considering the dimension of social justice. Therefore, our urban transport systems are essential areas for advancing sustainability through a transport justice-based approach to planning that can pivot the distribution of infrastructure investments over different social groups and transport modes. This study proposes such an approach by which such suitable urban transport strategies can be identified, co-created with users and appraised while considering the commuters’ needs. Specifically, the interaction between the multidimensional characteristics of sustainability and the principles of transport justice are investigated. The proposed approach is applied to London and Birmingham. The results show that a transparent and holistic approach to integrating users within transport planning is an effective way to reflect diverse needs and local circumstances and thereby ensure a just transition to sustainable urban transport policies. The results from the case studies highlight a strong rationale for the centrality of justice in any urban transport planning and policy making efforts, particularly in the allocation of road space.</p