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KC Leung
Charter Member
 Aug-18-04, 10:23 PM (PDT)
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"Settlement of prestressed concrete bridges"
 
   If one of the intermediate piers of a prestressed conconcrete bridge is settled, it is abvious that induced moments would be resulted on the bridge deck. However, since the bridge concerned is a prestressed concrete structure, the profile of the tendons would be varied due to the settlement. Would additional movement will be induced due to the change of tendon profiles.

Please literatures for futher reference in this respect.


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gajayv
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2 posts		 Oct-18-04, 10:17 PM (PDT)
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1. "RE: Settlement of prestressed concrete bridges"
In response to message #0
 
   Normally the contineous bridge structures are designed for 10mm differential settlement, This will have negligible change in bending moments due to prestressing forces and hence normally not considered in the design.


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Matt
Charter Member
 Oct-29-04, 08:16 AM (PDT)
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2. "RE: Settlement of prestressed concrete bridges"
In response to message #1
 
   Allowing settlement in bridge is not common, I believe the settlement will induce crack on Diapghram ( support ) at tension zone. You need to compute secondary moment due tendon profile, and find out tension stress is within allowable. Even if stress is within allowable, you need to stop further or long term settlement.


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Brian
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 Dec-21-04, 02:20 AM (PDT)
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3. "RE: Settlement of prestressed concrete bridges"
In response to message #0
 
   As stated by one of the other posters, the change in tendon shape is likely to be very small for normal bridge settlements i.e. you can neglect the effect.


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mugzy
Member since May-12-10
2 posts		 May-12-10, 11:36 AM (PDT)
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4. "RE: Settlement of prestressed concr"
In response to message #3
 
   Under stressing can cause an issue with settlement as well.

http://www.todaysconcretetechnology.com/community/>Concrete Forum

http://http://www.todaysconcretetechnology.com/self-compacting-concrete-and-admixtures.html>Self Compacting Concrete


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