Showing papers in "Structure and Infrastructure Engineering in 2019"
TL;DR: Preventive maintenance is increasingly becoming an essential strategy in the bridge industry owing to its proactive advantage of maintaining the structural sustainability during its entire service life cycle as discussed by the authors, and preventive maintenance is a proactive strategy in bridge industry.
Abstract: Preventive maintenance is increasingly becoming an essential strategy in the bridge industry owing to its proactive advantage of maintaining the structural sustainability during its entire service ...
115 citations
TL;DR: In this article, strand corrosion-induced concrete cracking under various prestress experimentally and analytically was investigated and experimental data on the critical time of cover cracking, crack width and...
Abstract: This study investigates strand corrosion-induced concrete cracking under various prestress experimentally and analytically. Experimental data on the critical time of cover cracking, crack width and...
90 citations
TL;DR: A novel method for bridge inspection that essentially digitises bridges using LIDAR so that they can be later inspected in a virtual reality (VR) environment is proposed, which promises to be highly effective in terms of interpretation of results, accessibility to critical areas and safety of inspectors.
Abstract: This paper proposes a novel method for bridge inspection that essentially digitises bridges using Light Detection and Ranging (LIDAR) so that they can be later inspected in a virtual realit...
48 citations
TL;DR: An investigation of the use of recursive partitioning and artificial neural networks (ANN; deep learning frameworks) in predicting the crack rating of pavements shows compelling machine learning models for the prediction of the crack ratings.
Abstract: Departments of Transportation regularly evaluate the condition of pavements through visual inspections, nondestructive evaluations, image recognition models and learning algorithms. The above metho...
44 citations
TL;DR: This study is presenting a proof-of-concept on how MAUT provides a systematic approach to improve the decision-making of maintenance planning by making use of available data, accommodating multiple performance goals, their uncertainty, and preferences of infrastructure managers.
Abstract: Bridge infrastructure managers are facing multiple challenges to improve the availability and serviceability of ageing infrastructure, while the maintenance planning is constrained by budget restrictions. Many research efforts are ongoing, for the last few decades, ranging from development of bridge management system, decision support tools, optimisation models, life cycle cost analysis, etc. Since transport infrastructures are deeply embedded in society, they are not only subject to technical requirements, but are required to meet the requirements of societal and economic developments. Therefore, bridge maintenance planning should accommodate multiple performance goals which need to be quantified by various performance indicators. In this paper, an application of Multi-Attribute Utility Theory (MAUT) for bridge maintenance planning is illustrated with a case study of bridges from the Netherlands road network. MAUT seeks to optimise multiple objectives by suggesting a trade-off among them and fina...
44 citations
TL;DR: In this article, building information modeling (BIM) is utilised as a promising computing environment and integrated digital representation platform of SHM that can organize and visualise a considerable amount of sensor data and subsequent structural health information over a prolonged period.
Abstract: With growing complex infrastructure, autonomous condition assessment of large-scale structures has garnered significant attention over the past few decades. Data-driven structural health monitoring...
43 citations
TL;DR: The study indicates the no special training is needed for photogrammetry and infrared scanning to generate a 3D geometric model, and suggests that all methods investigated can be used to create 3D models, however, with different level of completeness.
Abstract: Routine bridge inspections usually consist of visual observations. These inspections are time-consum-ing and subjective. There is a need to identify new inspection techniques for infrastructure tha ...
40 citations
TL;DR: In this article, a large body of literature focus on the assessment of resilience for engineered systems has drawn ample attention from the engineering community in recent years, which has resulted in a significantly large amount of literature focusing on the resilience of engineered systems.
Abstract: Assessment of resilience for engineered systems has drawn ample attention from the engineering community in recent years. It has resulted in a significantly large body of literature focusin...
38 citations
TL;DR: The factor- and age-basedVariable weight model outperforms both the factor-based variable weight model and constant weight model in helping bridge owners make maintenance decisions.
Abstract: To indicate health status of bridges and help stakeholders make decision on maintenance, a comprehensive framework has been proposed to evaluate structural efficiency of suspension bridges using an...
37 citations
TL;DR: It is concluded that the building generally remains within elastic range upon installation of the MTVAs, and the efficiency of the d-MTVAs is found superior only if they are placed as per the optimum placement criteria.
Abstract: Multimode vibration control of a non-linear building with distributed multiple tuned vibration absorbers (d-MTVAs) is studied to assess its seismic vulnerability. A multi-story building is exposed ...
36 citations
TL;DR: It is shown that regardless of the effect of incomplete and noisy modal data, the proposed method not only successfully determines the location and extent of single and multiple damage cases in the structures, but also has lower computational cost than the other optimisers.
Abstract: The present article proposes an efficient method for damage assessment of structures with incomplete and noisy modal data using model reduction method and Lightning Attachment Procedure Opt...
TL;DR: Results show that the proposed procedure to detect damage in a cable-stayed bridge based on feature extraction and selection can effectively reduce false alarms.
Abstract: In this paper, a novel approach is presented to detect damage in a cable-stayed bridge based on feature extraction and selection. In the first part of the paper, several features are used in time d...
TL;DR: It is shown that implementation of weigh-in-motion measurements in the probabilistic assessment of existing road bridges can reveal hidden bridge reserves and predict bridge reliability development over the required lifetime.
Abstract: The assessment of the existing road bridges as a part of bridge management networks has been a subject of several European research projects and actions in the last few decades. Bridge management i...
TL;DR: The results show that the cloud-based cyberinfrastructure platform can effectively manage the sensor data and bridge information and facilitate efficient access of the data as well as the bridge monitoring software services.
Abstract: Cloud computing is a computing paradigm wherein computing resources, such as servers, storage and applications, can be provisioned and accessed in real time via advanced communication netwo...
TL;DR: The objective of this study has been to develop an approach to the allocation of an effective maintenance limit for track geometry maintenance that leads to a minimisation of the total annual maint...
Abstract: The objective of this study has been to develop an approach to the allocation of an effective maintenance limit for track geometry maintenance that leads to a minimisation of the total annual maint...
TL;DR: In this paper, the authors numerically evaluate the effects of a girder bridge superstructure on the impact responses and load paths transferring the shear force of pier subjected to a moderate-energy barge.
Abstract: This paper aims to numerically evaluate the effects of girder bridge superstructure on the impact responses and load paths transferring the shear force of pier subjected to a moderate-energy barge ...
TL;DR: In this article, different methods and procedures have been developed to define prioritisation strategies of retrofit interventions aimed at reducing the seismic risk of school buildings on a large territorial scalar area.
Abstract: Different methods and procedures have been developed to define prioritisation strategies of retrofit interventions aimed at reducing the seismic risk of school buildings on a large territorial scal...
TL;DR: Reliability-based design load factors are estimated for explosive ordnance, terrorism, weaponeering and other scenarios and it was found that RC columns designed to existing standards have a significant margin of safety, but if there is large airblast variability, then the application of RBDFs is necessary to ensure that safety levels are acceptable according to international standards.
Abstract: Reliability-based design allows the decision-maker to select the level of reliability for a specific explosive blast loading scenario. Important to this is an understanding of airblast and resistan...
TL;DR: The Sutong Bridge with a span of 1088'm is supported by 272 cables, whose lengths range from 152.85'm to 576'm as mentioned in this paper, making it the longest bridge in the world.
Abstract: The Sutong Bridge with a span of 1088 m is supported by 272 cables, whose lengths range from 152.85 m to 576.77 m (the longest in the world). The half-year vibration acceleration data of tw...
TL;DR: This paper proposes a renewal-theory life-cycle analysis (RTLCA) with state-dependent stochastic models (SDSMs) that describe the deterioration processes that capture the multiple deterioration processes and their interactions through modelling the changes in the system state variables due to different deterioration processes.
Abstract: For the life-cycle analysis (LCA) of deteriorating engineering systems, it is critical to model and incorporate the various deterioration processes and associated uncertainties. This paper proposes...
TL;DR: Offshore wind turbines are vulnerable to external vibration sources such as wind and wave excitations due to the increasing size and flexibility as discussed by the authors, therefore, it is necessary to mitigate the excessive vibration.
Abstract: Offshore wind turbines are vulnerable to external vibration sources such as wind and wave excitations due to the increasing size and flexibility. It is necessary to mitigate the excessive vibration...
TL;DR: It is concluded that upon retrofitting, the modified dynamic properties, such as modal frequencies and damping ratio play an active role to attract forces during the two hazards, which in turn influences the response reduction achieved.
Abstract: The effectiveness of passive vibration control devices used to retrofit multi-storied steel buildings during their design life is investigated under the dynamic forces induced by earthquake and win...
TL;DR: In this article, the authors discuss the most destructive natural hazards that affect the serviceability of electricity systems and the role of electric power systems in assuring modern society's functionalities.
Abstract: Electric power systems play a critical role in assuring modern society’s functionalities. Earthquakes are one of the most destructive natural hazards that affect the serviceability of electricity t...
TL;DR: In this paper, the authors present a methodology to develop advanced reduction factors for the effective mechanical properties of corroded steel reinforcement of reinforced concrete (RC) members, which can be used to evaluate the effectiveness of reinforcement.
Abstract: This paper presents a methodology to develop advanced reduction factors for the effective mechanical properties of corroded steel reinforcement of reinforced concrete (RC) members. The reduction fa...
TL;DR: In this paper, the authors present an overview of different sources of uncertainty in LCA of infrastructure projects and describe systematic methods to evaluate their influence on the results, including physical properties of materials or amount of pollutants emitted by certain processes.
Abstract: The construction and usage of transport infrastructure are major causes of greenhouse gas emissions and energy consumption. The effects of resource consumption and pollutant emissions are often quantified through Life Cycle Assessment (LCA) models. All decisions made in infrastructure projects during the whole life cycle are afflicted by uncertainty, e.g. physical properties of materials or amount of pollutants emitted by certain processes. The pervasive role of uncertainty is reflected in LCA models, which therefore should consider uncertainty from various sources and provide a sound quantification of their effects. The aim of the work presented in this paper is to give an overview of different sources of uncertainty in LCA of infrastructure projects and to describe systematic methods to evaluate their influence on the results. The possibility of including uncertainty in a LCA-tool for infrastructure is presented, studying the sensitivity of the model output to the input parameters and two alternative approaches for propagation of uncertainty using two case studies. It is shown that, besides the influence of uncertainty in emission factors, other inputs such as material amounts and service life could contribute significantly to the variability of model output and has to be considered if reliable results are sought. (Less)
TL;DR: For households of all income levels, and especially for those that are food insecure, food access can be threatened by natural hazards as mentioned in this paper, and extreme natural hazards can disrupt critical infrastructure.
Abstract: For households of all income levels, and especially for those that are food insecure, food access can be threatened by natural hazards. Extreme natural hazards can disrupt critical infrastructure s...
TL;DR: In this article, the atmospheric boundary layer and wind effects on a 600 m high skyscraper during a landfall typhoon are presented and discussed based on records from a Doppler radar wind profiler and near-ground measurements at several meteorological stations.
Abstract: This article presents the observations of the atmospheric boundary layer (ABL) and wind effects on a 600 m high skyscraper during a landfall typhoon. Wind structure and characteristics throughout the entire ABL are presented and discussed based on records from a Doppler radar wind profiler and near-ground measurements at several meteorological stations. Wind speed profiles with the feature of low-level jets and radial-distance and exposure dependences of gradient height are stressed. Afterwards, wind-induced pressures on building surfaces of the skyscraper are investigated with highlights on non-Gaussian probability distributions of negative pressures and vortex shedding occurred alternately at two sides of the building. The structural responses measured by both accelerometers and strain gauges are analyzed subsequently. Modal parameters of the skyscraper and their dependence on response amplitude are presented and discussed. This study aims to provide useful information for the wind-resistant des...
TL;DR: The results of this study can help tram track managers to deploy cost-effective maintenance strategies by applying vehicle acceleration data in their decision-making processes by predicting tram track degradation index.
Abstract: Although vibration is considered as one of the important factors in passenger ride comfort, yet it has not been applied for predicting tram track degradation in tram network. Rail track degradation...
TL;DR: In this paper, the authors probabilistically assess the multiple failure modes of the piers of St. George Island Bridge subjected to barge collisions using the correlation analyses of failure limit states.
Abstract: This paper aims to probabilistically assess the multiple failure modes of the piers of St. George Island Bridge subjected to barge collisions using the correlation analyses of failure limit states ...
TL;DR: In this article, the dynamic behavior of a concrete-filled steel tube (CFST) hybrid framed arch railway bridge under moving trains is investigated through an in-site dynamic test, and the bridge is shown to be robust to collisions.
Abstract: In this study, the dynamic behavior of a concrete-filled steel tube (CFST) hybrid framed arch railway bridge under moving trains are investigated through an in-site dynamic test. The bridge...