Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 21 for “"civil infrastructures"”.
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Piezoelectric based energy harvesting on low frequency vibrations of civil infrastructures
… medical devices. However, its application on civil infrastructures has not been fully studied yet. This dissertation aimed to study and improve the piezoelectric-based energy harvesting on civil infrastructures, especially on bridge structures. To reach the objective, a more accurate model for …
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Autonomous UAV Navigation and Path Planning for Civil Infrastructures Inspection and Structural Health Monitoring
… step towards larger implementation for civil infrastructures and real world applications.The thesis initially presents a broad classification of path planning techniques followed by a comprehensive synthesis of each algorithm with critical assessment of existing work. The study then …
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Optimizing network lifetime in sensor networks with limited recharging capabilities
<p>Monitoring the structural health of civil infrastructures with wireless sensor networks aids in detecting failures early, but faces power challenges in ensuring reasonable network lifetimes. Recharging select nodes with Unmanned Aerial Vehicles (UAVs) provides a solution that currently can …
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Multi-scale structural health monitoring using wireless smart sensors
… smart sensor (WSS) technology to monitor civil infrastructures, shifting focus away from traditional wired methods. Successful implementations of such WSS networks for full-scale SHM have demonstrated the feasible use of the technology. Much of the previous research and application efforts …
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Bayesian-based Finite Element Model Updating, Damage Detection, and Uncertainty Quantification for Cable-stayed Bridges
Long-span bridges are important components of civil infrastructure systems because they are vital links in transportation systems. Therefore, as bridge systems age, understanding the safety and serviceability performance of structural components of these systems through structural health monitoring …
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Digital State Models for Infrastructure Condition Assessment and Structural Testing
… applies the concept of digital state models for civil infrastructure condition assessment and structural testing. Digital state models are defined herein as any transient or permanent 3D model of an object (e.g. textured meshes and point clouds) combined with any electromagnetic radiation (e.g., …
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Development and validation of coaxial cable sensors for damage detection of reinforced concrete structures
… proposed as continuous sensors for monitoring of civil infrastructures. Due to small deformation and minor cracks of engineering interest, coaxial cables have never been applied into reinforced concrete (RC) structures until the late 1990s. The state of the art in design of a cable sensor is to …
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Risk Assessment of Post-Fire Floods on Dams and Their Floodplains
… the impacts of post-wildfire floods on civil infrastructures and residential zones. Earth dams are vulnerable to post-wildfire floods. The increased post-wildfire runoff volumes due to changes in soil characteristics and reduced vegetation could result in overtopping failure of an earth …
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Fiber Bragg Gratings Strain Sensors for Railway Applications
… in applications for monitoring the health of civil infrastructures, such as bridges, oil rigs, and railroads. Due to the reduction in cost of fiber-optic components and systems, fiber optical sensors have been studied extensively for their higher sensitivity, precision and immunity to …
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Deterioration Model for Ports in the Republic of Korea using Markov Chain Monte Carlo with Multiple Imputation
… However, the study of deterioration model for civil infrastructures of ports is still in its infancy. In particular, there is almost no related research in South Korea. Thus, this study aims to develop a deterioration model for civil infrastructure of ports in South Korea.<br/><br/>There are …
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UV-Induced Intrinsic Fabry-Perot Interferometric Fiber Sensors and Their Multiplexing for Quasi-Distributed Temperature and Strain Sensing
… of industrial processes, health monitoring of civil infrastructures, etc. Optical fiber distributed sensors have attracted tremendous research interests in the past decade to meet the requirements of such applications. This research presents a multiplexed sensor array for distributed …
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Inference and uncertainty quantification for unsupervised structural monitoring problems
… functionality for smart and sustainable infrastructures that helps improving their safety and life span. A major element of such functionality is statistical inference and decision making which aims to process the dynamic response of structures in order to localize the defects in those …
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Saturated–Unsaturated behaviour of compacted clays
… equipment), thereby affecting the integrity of civil infrastructures. The geotechnical behavior (flow through, volume change, and shear strength) is governed by soil composition and compaction, soil-water-electrolyte mechanisms, soil-atmosphere interactions, and field conditions. This research …
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Applications of Computer Vision Technologies of Automated Crack Detection and Quantification for the Inspection of Civil Infrastructure Systems
Many components of existing civil infrastructure systems, such as road pavement, bridges, and buildings, are suffered from rapid aging, which require enormous nation's resources from federal and state agencies to inspect and maintain them. Crack is one of important material and structural defects, …
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Characterizations of concretes with alkali-activated binder and correlating their properties from micro- to specimen level
… material with great potential for its use in civil infrastructures. Previous researches on AAB concretes primarily focused on development of materials using limited number of aluminosilicates or calcium-based compounds, and corresponding qualitative evaluations of their microstructural …
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Behaviour and modelling of the inelastic response of concrete and steel-concrete infrastructures subjected to low-cycle fatigue
Nowadays, infrastructures are of strategical importance for allowing communication between countries. Owing to its usefulness, the design and the maintenance of bridges, streets and tunnels, which represent the network, become a fundamental issue. In order to investigate the behaviour of …
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Stochastic Ground Motion Models for Uncertainty Quantification in Earthquake Engineering
… in seismic design and risk management for civil infrastructures. An Uncertainty Quantification (UQ) framework is typically characterized by a probabilistic input, a computational model and quantities of interest used for decision-making. In the context of Earthquake Engineering, UQ aims to …
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Structural control optimisation and health monitoring using newly developed techniques
… of the structure or machines. In the field of civil engineering, control and identification of the state of health of the structure during the dynamic loads, such as earthquakes and attempt to suppress the vibrations and detect any damage or potential hazard are of vital importance and have …
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Analysis of the Stability and Response of Deep-Seated Landslides by Monitoring their Basal Temperature
… potentially causing significant damages to civil infrastructures. The landslide-prone areas are widespread around the world, having a detrimental fatality rate of tens of thousands. Hence, landslides are a globally threatening natural hazard with disproportional consequences. </p><p>This …
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