scholarly journals Probabilistic Maintenance and Optimization Strategies for Deteriorating Civil Infrastructures

2009 ◽  
pp. 353-377 ◽  
Author(s):  
D.M. Frangopol ◽  
L.C. Neves
Keyword(s):  
Civil Infrastructures

scholarly journals The Way Forward for Indirect Structural Health Monitoring (iSHM) Using Connected and Automated Vehicles in Europe

2021 ◽  
Vol 6 (3) ◽  
pp. 43
Author(s):  
Konstantinos Gkoumas ◽  
Kyriaki Gkoktsi ◽  
Flavio Bono ◽  
Maria Cristina Galassi ◽  
Daniel Tirelli
Keyword(s):  
Intelligent Transportation Systems ◽  
Intelligent Transportation ◽  
Transportation Systems ◽  
Transport Infrastructure ◽  
Policy Framework ◽  
Strategic Decisions ◽  
Automated Vehicles ◽  
Civil Infrastructures ◽  
Vehicle Automation ◽  
Labor Requirements

Europe’s aging transportation infrastructure requires optimized maintenance programs. However, data and monitoring systems may not be readily available to support strategic decisions or they may require costly installations in terms of time and labor requirements. In recent years, the possibility of monitoring bridges by indirectly sensing relevant parameters from traveling vehicles has emerged—an approach that would allow for the elimination of the costly installation of sensors and monitoring campaigns. The advantages of cooperative, connected, and automated mobility (CCAM), which is expected to become a reality in Europe towards the end of this decade, should therefore be considered for the future development of iSHM strategies. A critical review of methods and strategies for CCAM, including Intelligent Transportation Systems, is a prerequisite for moving towards the goal of identifying the synergies between CCAM and civil infrastructures, in line with future developments in vehicle automation. This study presents the policy framework of CCAM in Europe and discusses the policy enablers and bottlenecks of using CCAM in the drive-by monitoring of transport infrastructure. It also highlights the current direction of research within the iSHM paradigm towards the identification of technologies and methods that could benefit from the use of connected and automated vehicles (CAVs).

NSF PROGRAMS IN NONDESTRUCTIVE EVALUATION OF CIVIL INFRASTRUCTURES

1994 ◽  
Vol 11 (6) ◽  
pp. 349-356 ◽  
Author(s):  
KEN P. CHONG ◽  
JOHN B. SCALZI ◽  
MEHMET T. TUMAY PROGRAM DIRECTORS
Keyword(s):  
Nondestructive Evaluation ◽  
Civil Infrastructures

Geophysical characterization of an engineering infrastructure: laboratory tests.

2021 ◽  
Author(s):  
Giacomo Fornasari ◽  
Luigi Capozzoli ◽  
Gregory De Martino ◽  
Valeria Giampaolo ◽  
Enzo Rizzo
Keyword(s):  
Urban Areas ◽  
New Technologies ◽  
Detailed Knowledge ◽  
Reinforced Concrete Frame ◽  
The Public ◽  
Civil Infrastructures ◽  
Concrete Frame ◽  
Geophysical Application ◽  
Ground Penetrating

<p>The increase of the metropolises stresses the urban areas and intensive planning works is necessary. Therefore, the development of new technologies and methodologies able to explore the subsoil and manage its resources in urban areas becomes an important source in terms of saving time and money. In the last decade, a new subdiscipline in the Applied Geophysics started: Urban Geophysics (Lapenna, 2017). Urban Geophysics analyzes the contribute, in terms of limits and potentialities, that geophysical methodologies can give for providing useful information about the subsoil, environment, buildings and civil infrastructures and supporting the public administrations in planning interventions in urban scenarios.</p><p>This work introduces a laboratory test, that was performed at the Hydrogeosite CNR-IMAA laboratory of Marsico Nuovo (Basilicata region, Italy). The test consisted in a multisensor geophysical application on an analogue engineering model. Thanks to the possibility to work in laboratory conditions, a detailed knowledge of the structure was available, providing great advantages for assess the capability of the geophysical methodologies for analyze engineering issues, regarding the characterization of the infrastructural critical zone placed at the interface soil-structure. For this purpose, geoelectrical and electromagnetic methodologies, including Cross hole Electrical Resistivity Tomography and Ground Penetrating Radar, were used to characterize the geometry of the foundation structures and the disposition of the rebar for the reinforced concrete frame. Finally, new geophysical approaches were applied in order to define the corrosion rate of reinforcement.</p>

Earth Space, Planetary Geopolitics, and World Governments

Dark Skies ◽  
2020 ◽  
pp. 301-330
Author(s):  
Daniel Deudney
Keyword(s):  
Identity Formation ◽  
Ballistic Missile ◽  
Gravitational Attraction ◽  
Nuclear War ◽  
Axial Region ◽  
Earth Space ◽  
World Government ◽  
Civil Infrastructures ◽  
Orbital Space ◽  
Space Activities

Contrary to expansionist views, space around Earth, dominated by its gravitational attraction, is part of the planet, its astrosphere. While solar space is vast, the practical geography of Earth space is small because effective distances are so small. Analogies with terrestrial oceans and frontiers are very misleading. Space activities have amplified, not reduced, global closure. The applied propositions of geopolitics indicate the superiority of Clarke-Sagan over von Braun programs for achieving security. The deployment of ballistic missile space weapons has increased the probability of catastrophic nuclear war. Escaping nuclear vulnerability with a vast orbital Earth Net is unlikely to be successful. Orbital space is an axial region with integral tendencies, but realizing planetary military dominance is unlikely. Building Orbita of large orbital civil infrastructures will probably require or produce hierarchical world government. Anticipations of Earth identity-formation remain unrealized. Information satellites support a repressive planetary panopticon, but intensive expansion in microspace enables continued growth.

Study on the Stress Concentration in GFRP Composite Plates with Multiple Cut-Outs Subjected to Shear Loading

2018 ◽  
Vol 877 ◽  
pp. 446-452
Author(s):  
R.S. Aleena ◽  
R.S. Priyadarsini
Keyword(s):  
Stress Concentration ◽  
Composite Structures ◽  
Composite Plates ◽  
Shear Loading ◽  
Space Vehicles ◽  
Plane Shear ◽  
Civil Infrastructures ◽  
Glass Fibre Reinforced Polymer ◽  
Glass Fibre Reinforced ◽  
Engineering Practices

The composite materials are widely used nowadays as major parts of structures in many industries like aerospace, marine, automobile, space vehicles and also for the repair and replacement of civil infrastructures. Stresses are vital parameters considered in the design of structures. Any irregularities in shape, materials, or the presence of cut-outs create localized stress concentration and reduce the capacity of the material to take loads. The anisotropic behaviour of composite structures also makes the analysis more complex. Shear loading often exists in the engineering practices such as in aerospace due to heavy aerodynamic loads. So in the present study the effects of different parameters like layup sequences, number of plies, proximity of cut-outs, shapes and arrangements of cut-outs under in-plane shear loading on the glass fibre reinforced polymer (GFRP) plate with multiple cut-outs are studied using ABAQUS. The results from the study show that all the parameters considered for the study affects the stress concentration considerably. The observations are analysed then and the final conclusions are presented.

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