12. Bridge resilience considering natural hazards
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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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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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IP0264 - Development of Innovative Measures to Mitigate Ice Shedding from the Stays of the Cable-Stayed portion of the Samuel De Champlain Bridge
A number of cable-stayed bridges have experienced important problems related to the shedding of ice from stays onto traffic lanes below. As cable-stayed bridges have increased dramatically in span length, tower height and popularity over the past 30 years, this has become an important issue for this type of structure when built in a climate where ice accretion can occur. The new 3.4 km long Samuel [...]
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IP0199 - Northerm climatic actions on the structures
Maintenance, repair and replacement on the transportation network have major economic, and environmental impacts on society as well as on quality of life of the population. In northern climates, corrosion of reinforced concrete structures is one of the main causes fore the deterioration of the network. The corrosion processes are relatively well known and several models have been developed over the [...]
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IP0056 - Re-evaluation of aerodynamic stability of suspension bridges in Seto-Ohashi Bridges
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 [...]
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IP0077 - Seismic isolation as an effective technique within the framework of the national project for the seismic evaluation and retrofit of Swiss highway bridges
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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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 [...]
