2,107,568 research outputs found
Effects of structural deterioration and infrastructure upgrading on the life-cycle seismic resilience of bridge networks
No full textThe life-cycle seismic resilience of aging bridges and road transportation networks is investigated considering the long-term effects of bridge structural deterioration and network upgrading interventions under uncertainty. The proposed methodology is applied to a highway network with spatially distributed reinforced concrete (RC) bridges exposed to chloride-induced corrosion and different earthquake scenarios. A new road segment including a bridge is added over the lifetime to strengthen the network connectivity and improve the system resilience. The results show the detrimental effects of structural deterioration at the network scale and the benefits of infrastructure investments for network upgrading to enable long-term resilient infrastructures
Life-cycle resilience of deteriorating bridge networks under earthquake scenarios
No full textResilience of bridges and infrastructure networks is generally investigated considering damage and disruption caused by sudden extreme events, such as earthquakes. However, damage could also arise continuously in time due to aging and structural deterioration, which can modify over time the structural performance and functionality and, consequently, the system resilience. Therefore, for critical infrastructures exposed to seismic and environmental hazards, resilience depends on the time of occurrence of the seismic event. This paper investigates the life-cycle seismic resilience of aging infrastructures and presents a probabilistic approach to seismic assessment of deteriorating bridges and resilience analysis of road networks under prescribed earthquake scenarios. The time-variant seismic fragilities of the deteriorating bridges in the network are assessed for several limit states, from damage limitation up to collapse. The seismic demand is evaluated for each bridge based on a ground motion prediction equation in terms of earthquake magnitude and epicentral distance. The corresponding levels of seismic damage are derived from the time-variant fragilities and related to vehicle restrictions and traffic limitations. A traffic analysis is carried out over the entire road network to compute both the time-variant system functionality and life-cycle seismic resilience under prescribed post-event recovery processes. The proposed approach is applied to reinforced concrete bridges in a highway network with detour and re-entry link. The bridges are exposed to chloride-induced corrosion and earthquake scenarios considering different magnitude and epicenter location. The results show the detrimental effects of aging and structural deterioration and emphasize the role of the earthquake scenario on the time-variant seismic performance of bridge structures and life-cycle resilience of road networks
Seismic resilience of aging bridges and evolving road networks
No full textThis paper investigates the seismic resilience of aging infrastructures and presents a probabilistic approach to life-cycle seismic assessment of concrete bridges exposed to corrosion and resilience analysis of evolving road networks under prescribed earthquake scenarios. The seismic demand is evaluated for each bridge in the network based on a ground motion prediction equation in terms of earthquake magnitude and epicentral distance. The corresponding levels of seismic damage are derived from the bridge time-variant fragilities and related to vehicle restrictions and traffic limitations. Finally, a traffic analysis of the road network is carried out to compute both the time-variant system functionality and life-cycle seismic resilience under prescribed post-event recovery processes considering the evolution over time of the road network
Luca Sacher's MM Piano Recital 2
No full textConcerto No. 4 in G major, op. 58 by Ludwig van Beethoven
Sonata no. 3 for cello and piano by Stefano Sacher
Sonata Op. 120, no. 2 in E flat major by Johannes BrahmsRelated performance for this degree -- Luca Sacher's MM Piano Recital 1: https://hdl.handle.net/2346/98522Recital recordings are archival copies for educational purposes only. Members of the TTU community may request to listen/view them for educational purposes via the PDF link to the left
Luca Sacher's MM Piano Recital 1
Get PDFSonata in C Major, K 487 by Domenico Scarlatti
Sonata in A Major, K 208 by Domenico Scarlatti
Sonata in C Major, K 420 by Domenico Scarlatti
Drei Klavierstücke, D 946 by Franz Schubert
Ballade No. 2 in F Major, Op. 38 by Frédéric Chopin
Concerto No. 1 in Bb Minor, Op. 23 by Pyotr Ilich TchaikovskyRelated performance for this degree -- Luca Sacher's MM Piano Recital 2: https://hdl.handle.net/2346/98523Recital recordings are archival copies for educational purposes only. Members of the TTU community may request to listen/view them for educational purposes via the PDF link to the left
An assessment of the impact of possible CAP reform scenarios on Romanian agriculture
Get PDFUsing a simplified model, with key-variable the prices of two different possible scenarios of CAP reform after 2013 (moderate and radical), this paper present a comparison between the price effects of implementation of each reform scenario at 2015 horizon on Romanian agriculture. This short analysis shows that, under the presented hypotheses, the net welfare effect, due to the price changes, for the selected products, is positive in both reform scenarios, yet greater in the case of the radical reform. Integrated in the large context of Romanian development, it seems that the influence of CAP reform upon agriculture and rural areas will be most likely a gradual one: an interpenetration between the two scenarios is foreseeable, starting with the moderate reform that will dominate the period around 2013, the reform measures acquiring a more radical character afterwards.CAP reform, Romania, welfare effects, Agricultural and Food Policy,
Importance Sampling in Life-Cycle Seismic Fragility and Risk Assessment of Aging Bridge Networks
Get PDFLife-cycle structural reliability of deteriorating systems and multi-hazard risk assessment of aging infrastructure networks involve complex time-variant processes characterized by impactful uncertainties. Simulation methods are frequently the only viable tools to accurately estimate time-variant failure probabilities and risk metrics. However, simulation-based techniques are time-consuming and might be computationally inefficient and unfeasible in practice, particularly when analysis of large-scale systems are required to assess numerically sensitive performance indicators. This paper proposes a novel computational approach based on Importance Sampling to efficiently estimate the time-variant seismic risk of aging road networks. In the proposed methodology, the seismic capacity of deteriorating structural systems is efficiently simulated to account for the time-variant model uncertainties typical of life-cycle structural reliability problems. The possible improved trade-off in terms of sample size and estimate accuracy is tested in comparison with traditional Monte Carlo simulation approaches based on a practical application concerning the life-cycle seismic risk assessment of a road network with spatially-distributed deteriorating vulnerable bridges
Vertical Social Condensers and“Fantastic” Waterfronts in Rijeka, Croatia: Architectural Design Studioat Politecnico di Milano
Get PDFFor the second consecutive year, the Architectural Design Studiowas organized as an international collaborative class with theInstitute of Architecture Technology at the Technical UniversityGraz (TUG), with the participation of the teachers Marisol Vidaland Martin Boleš. Students and teachers from PoliMI and TUGoperated in the parallel Design Studios of the respective Mastersin Architecture. The collaboration fostered a fruitful interchangeof discussions among the students to elaborate their on-siteanalysis and design. Overall, this collaboration helped to sharedifferent teaching approaches between PoliMI and TUG towards amore international exchange of pedagogical methods. In addition,the enrolled students were mainly international, coming frommore than 20 different countries, bringing their cultural andeducational backgrounds for engaging discussion and designproposals
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