Evaluation of Effects of Fire on the I-465 Mainline Bridges : Volume I [Technical Summary]
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2012-01-01
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Edition:Technical summary.
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Abstract:On October 22, 2009, in Indianapolis, Indiana, a semi
tanker carrying liquefied propane lost control on the
underpass from I-69 southbound to I-465 eastbound,
crashing beneath the eastbound and westbound bridges
carrying mainline I-465 traffic. The semi rolled, causing
the tractor to catch fire and the propane tanker to
explode. As a result of the fire, the steel superstructure
was subjected to extreme temperatures; however, the
duration of exposure and magnitude of these temperatures
was not accurately established. Thus, testing was
performed to identify and document any short-term or
long-term effects that the fire may have had on the steel
superstructure. Three primary tasks were performed as
part of the study:
1. Quantify the effects of the fire on the properties of
the structural steel.
2. Quantify the effects of the fire on the properties of
the high strength (HS) bolts.
3. Quantify the effects of the fire on the overall behavior
of the bridge.
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