Analogical Assessment of Train-Induced Vibration and Radiated Noise in a Proposed Theater

This study presents the analogical assessment of the train-induced vibration and radiated noise in a proposed theater. The theater is to be constructed in a region with crowded metro lines, and the assessment is implemented in an analogical building with comparable structural type and metro condition. Prior to the assessment, the comparability...

A theoretical approach towards digital twins: A balance between an empirical and a fundamental model for distribution transformers

The energy transition will significantly impact distribution transformers as they will have to deal with more load on them, which is also more variable due to renewable energy sources. However, currently, these transformers are often not monitored with sensors. Therefore, the Dutch network operator Stedin asked to investigate the possibilities...

Data-based Dynamic Condition Assessment of Railway Catenaries

Railway catenary is the main infrastructure that delivers electric power for train operation. It is a structure commonly constructed along the railway line with contact wires suspended above the track. One or multiple pantographs mounted on the roof of a moving train collects electric current from the catenary through the sliding contact with a...

Categorization of the condition of railway embankments using a multi-attribute utility theory

In the current economic climate, it is crucial to optimize the use of all resources regarding railway infrastructure maintenance. In this paper, a multi-attribute decision support framework is applied to categorize railway embankments in order to prioritize maintenance activities. The paper describes a methodology to first determine the...

Bayesian operational modal analysis of offshore rock lighthouses: Close modes, alignment, symmetry and uncertainty

Despite use of GPS, lighthouses remain critical infrastructure for preserving safety of mariners and maritime trade, and the most dramatic examples are probably the Victorian era masonry towers located on remote offshore reefs around the British Isles and exposed to extreme weather conditions. Due to their age and likely increasing future...

Transformer Condition Assessment & Survival Model

Managing electrical distribution assets entails making the decision on how to proceed with an ageing asset. The three options that asset managers have are run to fail, perform maintenance or repairs and lastly to replace. This decision making process is becoming incrementally more important due to the threat of replacement waves. This a...

(RE)DEVELOP THE FUTURE: An instrument to develop and implement the concept of circularity for the redevelopment initiation phase

Context - The current environmental situation as a result of human life reflects the demand for more consciousness on the embedded energy of buildings. Moreover, due to the recent economic crisis the perceived naturalness to demolish existing buildings for new development is outdated. Hence, new functions should be accommodated in existing...

The use of new data sources in bridge maintenance decision-making: On the effect of using new data sources during decision making moments of bridge maintenance experts through a serious game based experiment

The current practice of bridge maintenance decision-making is informed by subjective visual inspection data with a long time interval between measurements, which creates inefficiencies and possible loss of value in the maintenance entity’s capabilities. New opportunities from technology-related innovations for measurement devices are available...

Experimental study of key parameters investigation in turnout crossing degradation process

The continuous increasing demand of public transportation capacity requires the railway network operating in tight schedule. The high transporting volumes not only aggravate the degradation of railway infrastructure but also shorten the time for maintenance. Well-arranged infrastructure maintenance contributes to the budget reduction and...

Comparison of methods used in European countries to assess buildings' condition

This paper presents a comparative analysis of methods used in European countries to assess buildings’ condition. The following methods were compared: a Portuguese method to assess buildings condition, an English housing health and safety rating system, a French method to assess buildings that may be declared inhabitable, a Dutch standard about...

Influence of test parameters on the on-load tap changer's dynamic resistance measurement

This thesis is aimed to analyze the effect of test parameters on DRM results from OLTC and its implementation in the condition assessment. Two test parameters were selected to be observed, which are test current and circuit resistance. Their amplitude was varied during the measurements and experiments in the laboratory as well as in the field ...

Dielectric Loss Estimation using Damped AC Voltages

Insulation failures in HV components may be caused by lower dielectric strength due to aging processes and by internal defects in the insulation system. It is known, that unlike voltage testing, measurements of the dielectric loss may give an absolute indicator for the quality level of the cable insulation. For several years the application of...

Dielectric Relaxation Analysis to Assess the Integrity of High Voltage DC Cables of the Mass Impregnated Type

This thesis is an in-depth research on information concerning High Voltage Direct Current (HVDC) power transmission. The far reaching effects from faults arising in HVDC cable systems are noteworthy and from this perspective a broad literature review is dedicated to insulation monitoring techniques. The analysis is further subcategorised into on...

On-site Testing and PD Diagnosis of High Voltage Power Cables

In addition to after-laying of new-installed high voltage (HV) power cables the use of on-site non-destructive on-site testing and diagnosis of service aged power cables is becoming an important issue to determine the actual condition of the cable systems and to determine the future performances. In this paper based on field experience an...

Using a condition-dependent approach to maintenance to control costs and performances