document

Reliability updating for lateral failure of historic quay walls

Hemel, M. (author), Peters, D.J. (author), Schweckendiek, T. (author), Jonkman, Sebastiaan N. (author)

The historic canal walls of Amsterdam, stretching 200 km in total, are constructed as a masonry wall on a timber deck supported by vertical timber piles. Understanding the resistance against lateral failure of these quays has been challenging due to uncertainties in their working principles, geometry, soil and structural properties. This...

journal article 2024

document

Load bearing capacity of existing concrete half-joints

Ruijgrok, Joris (author)

Concrete half-joints are a specific support detail in reinforced concrete structures, which reduce the construction height of the total structure. The use of concrete half-joints became popular around 1950s, but decreased its interest as a result of new insights on structural behaviour and collapses of these structures. Typical issues regarding...

master thesis 2023

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Approach to assessment of existing structures in the fib Model Code 2020

Walraven, J.C. (author), Dieteren, Gerrie (author)

Existing structures often no longer meet the demands formulated in contemporary design codes with respect to structural safety and serviceability. This occurs, for instance, if the loads on existing structures, like traffic loads on bridges, are larger than assumed in the original design. A second potential reason is that structures are...

journal article 2023

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Building water quality deterioration during water supply restoration after interruption: Influences of premise plumbing configuration

Yao, Mingchen (author), Zhang, Yue (author), Dai, Zihan (author), Ren, Anran (author), Fang, Jiaxing (author), Li, Xiaoming (author), van der Meer, Walter (author), Medema, G.J. (author), Rose, Joan B. (author), Liu, Gang (author)

Premise plumbing plays an essential role in determining the final quality of drinking water consumed by customers. However, little is known about the influences of plumbing configuration on water quality changes. This study selected parallel premise plumbing in the same building with different configurations, i.e., laboratory and toilet...

journal article 2023

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Assessment of existing structures in fib modelcode 2020: Solutions and examples

Walraven, J.C. (author), Dieteren, Gerrie (author)

For the assessment of concrete structures in the new fib Model Code 2020 (fib MC 2020), three categories are distinguished: (1) the residual capacity of existing structures without damage, (2) the residual capacity of structures suffering deterioration, and (3) the residual capacity of structures with noncompliant details. In the accompanying...

journal article 2023

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From Deterioration to Revival: Approaches to the Conservation of Plastic Buildings

Tyurkay, Ashal (author), Pottgiesser, U. (author)

The four Futuro case studies (Futuro No. 000, Corfu-Futuro, Donaldson-Futuro, Munich-Futuro) presented in this journal document conservation approaches to plastic buildings and elements – in this case, glass-reinforced plastic (GRP) sandwich panels. They contribute to the definition of general conservation approaches, and at the same time...

journal article 2022

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Reliability assessment of existing reinforced concrete bridges and viaducts through proof load testing

de Vries, R. (author), Lantsoght, E.O.L. (author), Steenbergen, R.D.J.M. (author), Fennis, S.A.A.M. (author)

In the assessment of existing infrastructure performing only a desk study is often not sufficient to determine the structural reliability of a bridge or viaduct. For concrete structures gathering field data by performing a proof load test offers detailed information about the structural performance. However, the relation between the magnitude...

conference paper 2022

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Analytical study about the expansion progress of concrete exposed to combined alkali silica reactions and freezing thawing cycles

Takahashi, Yuya (author), Gong, Fuyuan (author), Maekawa, Koichi (author)

Using numerical simulations, this study investigated the concrete expansion damage caused by the coupled action of freeze-thaw cycles (FTC) and alkali silica reactions (ASR). In the authors’ previous experiments, it was shown that a preceding ASR definitely accelerated the succeeding expansion by FTC. Further, even if the specimens have...

conference paper 2021

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Long-term deterioration of lubricant-infused nanoporous anodic aluminium oxide surface immersed in NaCl solution

Wu, Dequan (author), Ma, Lingwei (author), Liu, Bei (author), Zhang, Dawei (author), Minhas, Badar (author), Qian, Hongchang (author), Terryn, H.A. (author), Mol, J.M.C. (author)

This study investigated the deterioration of a lubricant-infused anodic aluminium oxide surface in a 1 M NaCl solution for ∼200 days. Direct observation by cryo-SEM and quantitative analyses by UV spectroscopy and EIS revealed that the long-term deterioration of the lubricant-infused surface was divided into two stages: the surface-adhered...

journal article 2021

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Identifying critical elements in drinking water distribution networks using graph theory

Meijer, D.H. (author), Post, Johan (author), van der Hoek, J.P. (author), Korving, Hans (author), Langeveld, J.G. (author), Clemens, F.H.L.R. (author)

Drinking water distribution networks (WDNs) are a crucial infrastructure for life in cities. Deterioration of this ageing, and partly hidden from view, infrastructure can result in losses due to leakage and an increased contamination risk. To counteract this, maintenance strategies are required to maintain the service level. Information on...

journal article 2021

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Dynamic pricing and inventory control policies in a food supply chain of growing and deteriorating items

Pourmohammad-Zia, Nadia (author), Karimi, Behrooz (author), Rezaei, J. (author)

Revenue and inventory management play a crucial role in the operational efficiency of food supply chains. The current study investigates dynamic pricing and inventory control policies in a two-level Food Supply Chain (FSC) of growing and deteriorating inventory that involves a rearing farm as the supplier and a retailer where these...

journal article 2021

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Assessing the transition effects in a drinking water distribution system caused by changing supply water quality: an indirect approach by characterizing suspended solids

Chen, L. (author), Ling, Fangqiong (author), Bakker, Geo (author), Liu, Wen Tso (author), Medema, G.J. (author), van der Meer, W.G.J. (author), Liu, G. (author)

Worldwide, it is common that the drinking water distribution systems (DWDSs) may be subjected to changes of supply water quality due to the needs of upgrading the treatment processes or switching the source water. However, the potential impacts of quality changed supply water on the stabilized ecological niches within DWDSs and the associated...

journal article 2020

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The Integration of Diffuse Reflectance Spectroscopy into the Electrosurgical Knife: Clarifying and Preventing Diffuse Reflectance Spectroscopy Signal Deterioration during Use of the Smart Electrosurgical Knife

van Gent, Carlijn (author)

During use of the smart electrosurgical knife, deterioration of the diffuse reflectance spectroscopy (DRS) signal intensity obstructs proper distinction between tissues. In order to reduce signal loss, this research has focused on the influence of smart electrosurgery on both the morphology and composition of the layer covering the optical fiber...

master thesis 2019

document

Carbonation mechanism of alkali-activated fly ash and slag materials: In view of long-term performance predictions

Nedeljković, Marija (author)

As the building sector is expanding, a growing interest in technologies that can reduce the CO2 emission from concrete production has led to partial replacement of cement with by-products from various industrial processes. Besides the partial replacement of cement, development of alkali activation technology ensures full replacement of cement in...

doctoral thesis 2019

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Expert judgement based maintenance decision support method for structures with a long service-life

Ter Berg, C.J.A. (author), Leontaris, G. (author), van den Boomen, M. (author), Spaan, M.T.J. (author), Wolfert, A.R.M. (author)

The optimal moment at which maintenance activities should be performed on structures with long service-life to guarantee the required quality of service is hard to define, due to uncertainties in their deterioration processes. Most of the developed methods and concepts use historical data to predict the deterioration process with deterministic...

journal article 2019

document

Long-term availability modelling of water treatment plants

Smith, Roland (author), van de Loo, Jasper (author), van den Boomen, M. (author), Khakzad, N. (author), Jan van Heck, Geert (author), Wolfert, A.R.M. (author)

Water treatment plants (WTPs) are characterised as complex configurations of repairable and deteriorating components. Previous studies have mainly focused on the average or steady-state availability of such systems while ignoring inherent characteristics like degradation. The current research proposes a two-level hierarchical model for long-term...

journal article 2019

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Sewer asset management: state of the art and research needs

Tscheikner-Gratl, Franz (author), Caradot, Nicolas (author), Cherqui, Frederic (author), Leitão, Joao P. (author), Langeveld, J.G. (author), Scholten, L. (author), Lepot, M.J. (author), Stegeman, B. (author), Clemens, F.H.L.R. (author)

Sewer asset management gained momentum and importance in recent years due to economic considerations, since infrastructure maintenance and rehabilitation directly represent major investments. Because physical urban water infrastructure has life expectancies of up to 100 years or more, contemporary urban drainage systems are strongly influenced...

review 2019

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Pipe failure modelling for water distribution networks using boosted decision trees

Winkler, Daniel (author), Haltmeier, Markus (author), Kleidorfer, Manfred (author), Rauch, Wolfgang (author), Tscheikner-Gratl, F. (author)

Pipe failure modelling is an important tool for strategic rehabilitation planning of urban water distribution infrastructure. Rehabilitation predictions are mostly based on existing network data and historical failure records, both of varying quality. This paper presents a framework for the extraction and processing of such data to use it for...

journal article 2018

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Enhancing rail infra durability through freight bogie design

Hiensch, E.J.M. (author), Burgelman, Nico (author), Hoeding, Wouter (author), Linders, Mark (author), Steenbergen, M.J.M.M. (author), Zoeteman, A. (author)

The extensive usage of railway infrastructure demands a high level of robustness, which can be achieved partly by considering (and managing) the track and rolling stock as one integral system with due attention to their interface. A growing number of infra managers consider, in this framework, the track-friendliness of vehicles that have...

journal article 2018

document

Long-term Availability Analysis of Water Treatment Plants: Complex Repairable Systems with Deteriorating Characteristics

van de Loo, Jasper (author), Smit, Roland (author)

Water Treatment Plants (WTPs) play a key role in assuring water availability to citizens and businesses. Long term availability of these plants is the interest of the asset manager of a WTP and can be influenced by maintenance strategies and modifications of the system. A WTP is characterized by a complex configuration and repairable,...

master thesis 2018