12. Résilience des ponts face aux risques naturels
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IP0043 - Assessing Resilience of Infrastructure: Seismic Retrofitting of New Zealand Bridges
New Zealand is a seismically active country, and as such the effects of earthquakes on infrastructure can be significant. Bridges are a key part of the road network, however there were many unknowns related to the true in-service seismic performance of bridges. With almost 11,000 km of state highways (and 83,000km of local roads) New Zealand is amongst the countries with the highest length of roads [...]
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IP0260 - Assessment of the vulnerability to resonance of bridges in a seismic event
After the occurrence of an earthquake of a significant magnitude, it is of vital importance that the bridges preserve their structural integrity and their service capacity. However, and despite the fact that such events are included in the different design codes as actions to be considered, the numerous damages produced in past earthquakes demonstrate their special vulnerability to this type of extraordinary [...]
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IP0055 - Seismic Retrofit of a Long-Span Suspension Bridge with emphasis on Tower-Girder Collision Problem
The Ohshima Bridge, one of the Honshu-Shikoku Bridges connecting Honshu and Shikoku Islands in Japan, is a long-span suspension bridge with a center span of 560 m. The stiffening girder is a steel box type with 23.7 m wide and 2.2 m deep. The tower is a steel two-story rigid-frame type with 88.35 m high. The bridge was designed based on design codes developed solely for the bridge and opened in 1988. [...]
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IP0276 - The problem of melting salts in the corrosion of rebars in bridge decks and their effects on post-tensioned structures
The use of melting salts during low temperature periods in structures either without a waterproof treatment or a deficient one might result in the entrance of chloride ions through the upper face of their decks. Furthermore, this phenomenon may be aggravated by the presence of other previous relevant concrete pathologies such as pores, hollows or cracks inside the concrete which may ease the circulation [...]
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IP0185 - Alert and monitoring system of resilient infrastructure for adaptation to climate change using optimization process
Infrastructure road networks are critical for the development of countries, since that are fundamental in commerce, defense and social development. Due to the geography of Chile, the road network goes through the country from North to South being critical of an interruption or collapse of it. Currently in Chile, there are about 7000 bridges, which connect the road network. Its interruption implies [...]
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IP0199 - Actions climatiques nordiques sur les structures
Les travaux de maintenance, de réparation ou de remplacement sur le domaine routier occasionnent des nuisances sociétales et des dépenses majeures à la société. Dans le domaine des ouvrages d’art routier, la corrosion des structures en béton armé est une des premières causes de ces travaux de réhabilitation dans les environnements hivernaux sévères. Le processus de corrosion est relativement [...]
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IP0264 - Développement de mesures innovantes pour atténuer le détachement de glace des câbles de la section à haubans du pont Samuel-De Champlain
Un certain nombre de ponts à haubans ont connu d'importants problèmes liés au détachement et à la chute de la glace des haubans sur les voies de circulation en contrebas. De popularité croissante, la portée et la hauteur des pylônes des ponts à haubans ont considérablement augmenté au cours des trente dernières années. Cet enjeu est devenu de plus en plus problématique pour ce type de [...]
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IP0077 - L'isolation sismique comme une technique efficace dans le contexte du projet national pour l'évaluation et le confortement parasismique des ponts autoroutiers suisses
In Switzerland, the assessment of the earthquake safety of the approximately 4'200 national road bridges started in 2005 and was completed in 2020. The evaluations have shown that the bridge structures of the national roads are generally built robustly against the effects of earthquakes. Measures to increase earthquake resistance are only necessary for about 6% of the national road bridge asset and [...]
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IP0056 - RE-EVALUATION DE LA RE STABILITÉ AÉRODYNAMIQUE DES PONTS SUSPENDUS DANS LES PONT SETO-OHASHI
The Honshu-Shikoku Bridges are group of 17 long span bridges, which connects Honshu and Shikoku Islands in Japan by 3 routes. Since these bridges are located over the sea, the bridges designed considering strong winds due to typhoon and seasonal winds. The center route called Seto-Ohashi Bridges completed in 1988, and consists of three suspension bridges, two cable stayed bridges and one truss bridge [...]
