Re: Losses Due to Anchorage Slip- Prestressed Concrete!!

When you release your bulkheads in your example the tension bars start to
pull against the concrete. Of course the displacement of the tension bars
and the concrete are coupled then. So if the steel and the concrete behave
both elastically the strain variations along the steel and the concrete will
be nearly the same (unless there are large stiffness variations along the
load path in the concrete). When the strains variations are the same along
both there will be no slip.

Timo



<jrm2002@xxxxxxxxxxxxxx> wrote in message
news:1131988392.280226.121480@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> In case of a pretensioned girder the high tensile steel is stretched in
> a prestressing bed and anchored on the bulk heads.
>
> Afterwards, the concrete is poured and allowed to set.
>
> In literature it is given that the losses due to anchorage slip (slip
> of the cable with respect to the anchorage, thereby reducing the given
> elongation in steel) occurs only in post tensioned members . But in
> pretensioned members also the tensile steel is stretched and anchored
> on the bulk heads(before pouring of concrete). Here too there can be a
> slip of the cable with respect to the anchorage.Right?
>
> Then why is it said losses due to anchorage slip occur only in post
> tensioned members??
>


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