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Re: AW: AP: Wash. State bridge collapses into Skagit River; sends vehicles, people into water

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Peter,

Since morning I did not have a chance to look to more photos, but, last night I saw something quite strange and that was a photo that shows the collapsed span and i could see that the deck has slid into the water and all longitudinal floor beams are bare and exposed. It seems that there was no shear connectors connecting the R/C deck to floor beams. If this the case it is not good to have "floating" decks in seismic areas since during earthquakes the entire deck can move horizontally in transverse direction and hit the diagonals and verticals laterally probably causing detrimental damage to them.

Where was the photo with cracks that you are referring to?

Thanks.

Hassan
www.ce.berkeley.edu/~astaneh
On 5/24/2013 9:10 AM, RANGELOW Peter (AREVA) wrote:
Hassan,

Did you notice the significant cracking of the concrete deck somewhere in
the middle of the bridge (bridgehunter.com; behind a car in the left lane
and a green garbage at the right borderline of the right lane?)

Peter

-----Ursprüngliche Nachricht-----
Von: seaint-seaosc(--nospam--at)mail-list.com [mailto:seaint-seaosc(--nospam--at)mail-list.com] Im
Auftrag von Abolhassan Astaneh Gesendet: Freitag, 24. Mai 2013 07:08
An: seaint-seaosc(--nospam--at)mail-list.com
Betreff: Re: [SEAINT-SEAOSC] AP: Wash. State bridge collapses into Skagit
River; sends vehicles, people into water

There is nice interactive photo of the collapsed bridge taken on the
bridge. <http://bridgehunter.com/wa/skagit/4794A0000000/>

You can rotate the viewfinder and see different views.  Visually, the
bridge members and connections seem to be in good condition (at least the

Truncated 999 characters in the previous message to save energy.

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