The study explores an original idea that responds to the urgent need reduce detrimental environmental impacts of load-bearing floor construction in new buildings by reusing saw-cut reinforced concrete (RC) pieces salvaged from soon-to-be demolished structures. Cutting and large RC rather than crushing them rubble is untapped emerging circular method with a high potential for reducing waste generation, natural resource consumption, upfront greenhouse gas emissions. Through iterative design...

Assessing ageing infrastructure is a critical challenge for civil engineers due to the difficulty in estimation and integration of uncertainties structural models. Field measurements are increasingly used improve knowledge real behavior structure; this activity called identification. Error-domain model falsification (EDMF) an easy-to-use model-based structural-identification methodology which robustly accommodates systematic originating from sources such as boundary conditions, numerical...

The visual inspection of existing infrastructure is a critical step for asset management, as the detection and quantification damage must be useful to prioritise maintenance. In Switzerland, main inspections are made every five years all road bridges. For each bridge, condition value ranging from 1 5 given. As only element-based degradations currently taken into account in bridge-condition evaluations, inaccurate assessments global structural safety often provided by bridge inspectors. this...

Abstract The examination of existing civil structures must be differentiated from designing new structures. To have sustainable and circular asset management, the behavior these better understood to avoid unnecessary maintenance replacements. Monitoring data collected through bridge load testing, structural health monitoring, non-destructive tests may provide useful information that could significantly influence their structural-safety evaluations. Nonetheless, monitoring techniques are...

Ultra-High-Performance Fibre-Reinforced Cementitious Composite (UHPFRC) has been developed to design lightweight structures and enhance existing designs. As the environmental footprint of construction industry must be significantly reduced, potential lower impacts using UHPFRC needs explored. While greenhouse gas emissions a volume are higher than that same concrete, enables reduction in amount material required structural designs improves durability structures. The thus compared on...

<p>Carefully extracting reinforced concrete (RC) elements from soon-to-be demolished structures and reusing them as load-bearing components is an emerging circular low-carbon alternative to building new structures. As floor construction typically accounts for the most upfront carbon footprint of buildings, this paper presents design, structural verifications process FLO:RE, a system built with reused saw-cut RC slab steel beams. To value all pre- existing properties, reuses in bending,...

The entrainment, breakup, and interplay of air bubbles were observed in a vertical, two-dimensional supported jet at low impact velocities. Ultra-high-speed movies analyzed both qualitatively quantitatively. onset velocity bubble entrainment was between 0.9 1.1 m/s. Most entrained as detached from elongated cavities the impingement point. Explosion, stretching, dejection mechanisms for individual interaction behaviors encompassed rebound, “kiss-and-go,” coalescence breakup induced by...

The reuse of structural components in new buildings has great potential to reduce the environmental impacts construction sector but remains uncommon practice. An obstacle its wider implementation is lack robust assessment methods and decision-making tools that consider full spectrum benefits drawbacks. This paper proposes a multi-criteria decision framework builds on simulated set design alternatives with varying ratios reused components. A performance criteria presented, addressing...

Managing existing civil infrastructure is challenging due to evolving functional requirements, material aging, and climate change. With increasingly limited economic, environmental, resources, more sustainable solutions for practical asset management are required. Significant efforts have been made monitor infrastructure, such as bridges. In-situ measurements collected with the aim of improving accuracy structural capacity evaluations. Monitoring data through bridge load testing, continuous...

The management of existing civil infrastructure is becoming more crucial as a large share bridges approaching their theoretical end service duration. Structural performance monitoring aims to verify bridge safety at given time, and it should be differentiated from structural health monitoring, which detecting damage. Possible techniques include load testing, non-destructive continuous behaviour, environmental conditions, levels. Nonetheless, selecting the optimal combination challenging each...

Examining the performance of an existing bridge requires information on several aspects, such as design choices, material properties, and ongoing degradation processes. It often happens that some critical is not available. The traditional approach in structural engineering to take most conservative assumption for each unknown, following new-design principles. will be concluded safety ensured must strengthened or replaced. This conclusion has important economic costs, impacts users,...

In developed countries, structural assessment of existing bridges should not be performed using the same conservative models that are used at design stage. Field measurements real behaviour provide additional information for inference previously unknown reserve capacity. Structural identification helps identify suitable as well values parameters influence behaviour. Since gained by measurement system has a direct impact on identification, studies optimal sensor placement have been...

The Internet of Things creates opportunities to develop data-driven design methodologies for smart cities. However, effects rather than causes are often measured in complex urban systems, requiring robust data-interpretation methodologies. Additionally, effective monitoring large components, such as civil infrastructure, involves multiple sensor devices and invasive systems. In these situations, the measurement systems is an important task. Usually, this task carried out by engineers using...

The aim of structural identification is to provide accurate knowledge the behaviour existing structures. In most situations, finite-element models are updated using measurements and field observations. Error-domain model falsification (EDMF) a multi-model approach that compares predictions with sensor while taking into account epistemic stochastic uncertainties—including systematic bias inherent in assumptions behind models. Compared alternative model-updating strategies such as residual...

Train wheel flats are formed when wheels slip on rails. Crucial for passenger comfort and the safe operation of train systems, early detection quantification wheel-flat severity without interrupting railway operations is a desirable challenging goal. Our method involves identifying size by using model updating strategy based dynamic measurements. Although measurement modelling uncertainties influence identification results, they rarely taken into account in most methods. Another challenge...

Abstract Ultra High-Performance Fiber-Reinforced Cementitious Composite (UHPFRC) is increasingly popular for new structural designs thanks to its high resistance both in tension and compression. When UHPFRC complemented with steel reinforcing bars or prestressing tendons, the structure remains waterproof crack-free under service conditions, significantly improving durability compared conventional reinforced-concrete designs. The Aiguillon Bridge one of first railway bridges entirely made...

Ultra-High-Performance Fiber-Reinforced Cementitious Composite (UHPFRC) is becoming popular in designing lightweight and durable structures. UHPFRC structural elements remain crack-free waterproof under service conditions, significantly improving durability compared to designs made of conventional reinforced concrete. Due its unique composition, has specific mechanical properties. In particular, the early-age development properties, such as elastic modulus, difficult monitor it occurs while...

Abstract The management of existing civil infrastructure is challenging due to evolving functional requirements, aging and climate change. Civil often has hidden reserve capacity because conservative approaches used in design during construction. Information collected through sensor measurements the potential improve knowledge structural behavior, leading better decisions related asset management. In this situation, monitoring system an important task since it directly affects quality...