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How global warming and changes in rainfall are compromising the integrity of bridges and the overall impact of these conditions.
O global warming, a phenomenon that is increasingly present in everyday life, has shown direct and worrying effects on infrastructure around the world, particularly on bridges. These structures, essential for the mobility and connectivity of cities, are being compromised in ways that previously seemed unimaginable. This article explores how rising temperatures and climate change are impacting the integrity of bridges and what the potential consequences are for global infrastructure.
Global warming and bridges: the impact of high temperatures
O increase temperatures due to global warming have been a critical factor in the deterioration of bridges.
With the phenomenon, it was observed that heat waves intensify the risk of landslides.
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Paul Chinowsky, a professor of civil engineering at the University of Colorado, points out that the crisis facing many bridges in the US is closely linked to extreme weather events. According to Chinowsky,
“These things are not what would happen under normal weather conditions.” High temperatures take their toll on bridge materials, which were not designed to withstand such severe temperature fluctuations.
This effect, resulting from global warming, causes “swelling” and “shrinkage” in structural components.
The materials used in bridges, such as concrete, steel and wood, have limits regarding temperature variations.
When exposed to heat waves, these materials can expand or contract, compromising structural integrity and, in extreme cases, leading to bridge collapse.
Studies show that for many structures, excess heat can cause significant deformation and even rupture.
Rain and floods: other challenges for structures
In addition to extreme heat, the increase in the frequency and intensity of rainfall also poses a considerable threat.
Frequent flooding and excessive rainfall intensify erosion around bridge foundations, which can lead to weakening of the structure.
This type of wear is most frequently observed in regions that experience torrential rains and severe weather events.
A study by researchers at Colorado State University revealed that a portion significant of bridges in the US will be impacted by rising temperatures associated with global warming.
In a scenario projected to the year 2050, analyses indicate that up to one in four steel bridges in the US could collapse due to extreme weather conditions.
The researchers warn that “neglecting possible future climate changes could put the integrity of many bridges at risk”, showing the importance of paying attention to the impacts of global warming.
The impact of rainfall is also evident in specific cases. In the state of Vermont, for example, the combination of heavy rainfall and high temperatures has caused damage to approximately 100 bridges in the last two years.
Other states, including New York and Maine, have also reported similar problems, highlighting growing concern about the condition of bridges.
What is being done?
To meet the challenges of global warming, some regions are taking steps to strengthen the resilience of bridges to new climate conditions.
In Vermont, a reconstruction process has begun to update bridges with more resistant materials and deeper foundations, capable of better withstanding thermal variations and erosion caused by rain.
This approach aims to increase the durability of structures and minimize the risk of future collapses.
Other places are also implementing strategies to mitigate the damage caused by global warming and extreme weather events.
However, the task is complex and requires investments significant engineering and maintenance efforts to ensure that bridges can withstand new environmental conditions.
International cases: examples of damage due to global warming
The problem is not limited to the United States. In other parts of the world, such as Rio Grande do Sul in Brazil and Japan, the effects of global warming on bridges are also evident.
In Brazil, heavy rains have caused the destruction of bridges, as was the case in the city of Santa Tereza. In Japan, similar episodes have recently occurred, demonstrating that the impact of climate change on infrastructure is a global challenge.
In short, global warming is presenting new challenges for the maintenance and safety of bridges around the world.
O increase Temperatures and changes in precipitation patterns are accelerating the deterioration of these structures, putting the safety and functionality of transportation networks at risk.
As the climate continues to change, it is essential that engineering and maintenance strategies evolve to meet these new challenges and protect cities’ critical infrastructure.
