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Re: confining effect of transverse reinforcement

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transverse reinforcement has a multibeneficial effect on seismic behavior
of bridge pier columns that is:
i)confines concrete which in turn leads to increased  concrete strength and
   maximum strain (from say 0.4% to 1.8%)and hence ductility of the member
 is drastically increased.
ii) apart of providing shear reinforcement enhances shear resisted by concrete
    (due to higher fc).
iii) prevents buckling of longitudinal reinforcement.
 you can find details in several textbooks(e.g M.J.N.Priestley,E.Seible,G.M.Calvi
    'seismic design  and retrofit of bridges).design guidelines are also provided in
  most of the current seismic design codes(e.g EC8-P2,CALTRANS etc)
john.n sigalas
ps you can contact me privately for additional info should you so wish
----- Original Message -----
Sent: Friday, August 23, 2002 4:32 PM
Subject: RE: confining effect of transverse reinforcement

Can you recommend me some codes or articles on this confining effect?
thanks in advance
-----Original Message-----
From: linxin_0(--nospam--at) [mailto:linxin_0(--nospam--at)]
Sent: Friday, August 23, 2002 1:39 PM
To: seaint(--nospam--at)
Subject: Re: confining effect of transverse reinforcement

in case of column with large axial force and small moment, transverse reinforcemant will increase the column strength sharply, but in case of column with small axial force and large memont, the effect of confining is very limited for only part of the column resists the compression.

> -----Original message-----
> From: "Mete_Bayk?"
> To: seaint(--nospam--at)
> Date: 08/22/2002(Thu) 08:47pm
> Subject: confining effect of transverse reinforcement
> Log CabinsHi ,
> Anybody can help me to understand the usage of confining effect of tranverse reinforcement of the bridge piers?
> Do I need to use confined concrete properties (fcc') for determining the overstrength capacity of the piers? or is it being used for the push-over analysis only?
> thanks
> mete

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