New bridge design promises to lengthen service life : research spotlight.
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2015-03-01
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Abstract:In Michigan’s winter climate, the steel reinforcements in traditional boxbeam
bridges are susceptible to concrete cracking, deterioration and
corrosion. They are also difficult to inspect. To address these problems,
MDOT has partnered with Iowa, Minnesota, Oregon and Wisconsin to
investigate an innovative bridge design that uses decked bulb T beams,
carbon-fiber prestressing and post-tensioning strands, and ultra-highperformance
concrete for joints. These bridges could last more than
100 years and require far less maintenance, leading to significant
cost savings for Michigan taxpayers. These bridges are also easy to
construct, inspect and repair.
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