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 45 for “"Settore ICAR/09 - Tecnica delle Costruzioni"”.
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Structural optimization: an approach based on genetic algorithms and parallel computing
An approach based on genetic algorithm and parallel computing has been presented and discussed for structural optimizations. Some details on its software implementation are given and explained. Numerical simulations demonstrate the applicability of the proposed approach for the optimization of …
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Investigation of the Dynamic Performance of a Cable-Stayed Footbridge
The developments in conceptual design, material technology and efficient construction techniques enabled the creation of longer, lighter, slender and stylish Cable-Stayed Foot Bridges (CSFB). Hence, modern CSFB can be characterized by interacting phenomena like cable nonlinearities, deck dynamic …
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MITIGATING THE ADVERSE EFFECTS OF INTERNAL LATERAL IMPACTS IN STRUCTURES EQUIPPED WITH FRICTIONAL ISOLATORS
L'abstract è presente nell'allegato / the abstract is in the attachment
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Equivalent Viscous Damping and Inelastic Displacement for Strengthened and Reinforced Masonry Walls
The masonry still one of the widespread construction system for low-rise residential buildings even for countries prone to seismic risk. Despite seismic design methods yet in use are force-based, in the last decades was highlighted as the differences in strength between two levels of damage is low, …
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Rolling-Ball Rubber-Layer system for the lightweight structures seismic protection: experimentation and numerical analyses
Protection of high-value building contents from seismic damage represents a worldwide challenging task. Artefacts, sophisticated medical and electrical equipment, high performance computer installations and other special contents have shown, in the last years, their high vulnerability both for high …
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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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Decision making for bridge stock management
Bridges in service in most Western Countries were built according to codes with design loads that are now inconsistent with today’s traffic demands. Currently, transportation agencies do not know how to respond to transit applications on their bridges. This thesis focuses on the legal issues …
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Semplified seismic Vulnerability Assessment of Masonry Arch Bridges
This study concerns seismic vulnerability assessment of masonry arch bridges with common typologies in Europe. Bridges are, in most cases, the most vulnerable elements in the transportation network during an earthquake; therefore, their seismic vulnerability assessment is necessary for a proper …
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Control and Time Integration Algorithms for Real-Time Hybrid Simulation
… rate-dependent parts are often physically modelled within a realistic real-time test, while the remainder parts are simultaneously evaluated by solving differential equations. Evidently, the challenge of these methods is to enforce the coupling at the interface between portions via real-time …
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Numerical and experimental methods for seismic risk assessment of civil and industrial structures
… where the steel storage tank is numerically modelled while, conversely, the physical substructure encompasses the coupled piping network. Besides, ground motions for dynamic tests are synthetized based on a stochastic ground motion model whose input parameters are derived from the results …
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Seismic risk mitigation of "special risk" process plants through enhanced concepts and subplant hybrid simulation
This doctoral thesis focuses on the seismic risk mitigation of â special riskâ industrial facilities, like chemical, petrochemical and process industries. It is known that the impact of natural hazards, such as earthquakes, on this type of structures may cause significant accidents leading to …
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Displacement-Based Seismic Design of Timber Structures
The research is aimed at developing seismic methods for the design and evaluation of the seismic vulnerability of wooden structures, using a displacement-based approach. After a brief introduction on the seismic behaviour of timber structures, the general Direct Displacement-Based Design …
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Giunti semirigidi con barre incollate per strutture lignee = Ductile moment-resistant steel-timber connections with glued-in bars
… in particolare la previsione affidabile delle modalità di rottura del giunto, permette la progettazione di connessioni resistenti a momento in grado di presentare alte deformazioni plastiche senza fenomeni di rotture fragili, con un notevole grado di duttilità strutturale a livello …
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Progressive Collapse Assessment of Steel and Concrete Composite Structures Subjected to Extreme Loading Conditions
Accidental events, such as impact loading and explosions, are rare events with a very low probability of occurrence, but their effects often lead to very high human losses and economical consequences. Vulnerability of structures to the effects of local damages and its mitigation are issues widely …
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Role of timber diaphragms in the seismic response of unreinforced masonry (URM) buildings
The research presented in this thesis was focused on timber floor diaphragms in unreinforced masonry (URM) buildings. The work was divided into two phases. The first phase was aimed at the investigation of the effects of the in-plane behavior of timber diaphragms on the global seismic response of …
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Input identification, footbridge control and non-linear identification of a MR damper
The thesis aims to investigate the dynamical criticality of a pedestrian footbridge and the use of a semi-active tuned mass damper. In this respect, the work appears threefold since the first and third part regard identification of a realistic model for the damping device and semi-active control of …
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Dynamic substructuring of complex hybrid systems based on time-integration, model reduction and model identification techniques
Hybrid Simulation with Dynamic Substructuring (HSDS) is a mixed numerical/- experimental simulation techniques. In detail, HSDS combines a Physical Substructure(PS) -the most critical subpart- with a Numerical Substructure (NS), and a compliant time integration process calculates the overall …
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Theory of Decision Based on Structural Health Monitoring
The average age of strategic constructions in the Western world is becoming higher and higher. Many of these structures need inspection, maintenance or replacement, resulting in significant costs. The accurate estimate of structural condition can make operators optimize the allocation of resources. …
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Integrated Methodologies Based on Structural Health Monitoring for the Protection of Cutural Heritage Buildings
In the last decades the need for an effective seismic protection and vulnerability reduction of strategic structures and particularly the architectural heritage determined a growing interest in Structural Health Monitoring (SHM) as a measure of passive mitigation of earthquake effects. The object …
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A monitoring method for after-earthquake damage evaluation of buildings
After-earthquake assessment of buildings in terms of usability and safety is nowadays performed by in-charge technicians which are called to give their judgment basing mainly on in-field surveys and visual inspections. This necessarily implies additional inconvenience for residents and economic …
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