Freeway overpass collapses in Oakland, Ca (SF Bay Area)
Freeway overpass collapses in Oakland, Ca (SF Bay Area)
(OP)
Here is the news story:
http://ww w.sfgate.c om/cgi-bin /article.c gi?f=/chro nicle/arch ive/2007/0 4/29/BAGVO PHQU46.DTL
A gasoline tanker crashed and burned underneath, the resulting fire and heat destroyed the overpass above.
This is really going to screw up my commute to work tomorrow! (and prob for the next few months!!!)
BTW, This is what intense heat can do to steel reinforced concrete structures. Some 9/11 conspiricy theorists should take note. :)
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A gasoline tanker crashed and burned underneath, the resulting fire and heat destroyed the overpass above.
This is really going to screw up my commute to work tomorrow! (and prob for the next few months!!!)
BTW, This is what intense heat can do to steel reinforced concrete structures. Some 9/11 conspiricy theorists should take note. :)






RE: Freeway overpass collapses in Oakland, Ca (SF Bay Area)
It's either a testiment to the amount of heat energy or the lack of insulation of the concrete to the rebar. It's a very well known phenomena that the modulus of elasticity degrades wtih increased temperatures.
Frankly if I hadn't seen the fire photos, I would have thought another earthquake shook this bridge. Note the retrofit of the concrete columns on the nearby bridge.
Regards,
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RE: Freeway overpass collapses in Oakland, Ca (SF Bay Area)
RE: Freeway overpass collapses in Oakland, Ca (SF Bay Area)
RE: Freeway overpass collapses in Oakland, Ca (SF Bay Area)