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Confinement at beam column junction

 
This forum is locked: you cannot post, reply to, or edit topics.This topic is locked: you cannot edit posts or make replies.    www.sefindia.org Forum Index -> Past Discussions Year 2003
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jaiganesh09
SEFI Member
SEFI Member


Joined: 26 Jan 2003
Posts: 1
Location: Thailand

PostPosted: Thu Jan 30, 2003 7:30 am    Post subject: Confinement at beam column junction Reply with quote

Hi all
I wish to put forward my question that i had experienced practically in site . How good the confinement of Stirrups at beam column junction are practically possible during construction.Because the Barbender who do this work he is telling some blame excuses that its difficult to do the confinement.
Is there is any alternative method to do this
M.JaiGanesh  


Saluting our Real HERO'S  
M.Jai Ganesh, Structural Dyanmics Lab , S E R C  , CSIR Campus      

Taramani ,Chennai .  PH: 2542211, 2542991 ext :-709



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prvnkdce
SEFI Member
SEFI Member


Joined: 26 Jan 2003
Posts: 10

PostPosted: Thu Jan 30, 2003 10:30 am    Post subject: Confinement at beam column junction Reply with quote

Dear all,
May the issue of achieving desired confinement and ductility at the beam-
column joints be
accomplished at site with a mix of
1. as much as feasible confinement by stirrups, and as much possible with
overlapping/welding/bending of top beam bars in column etc.
2. Material ductility through employing steel fibre concrete/SIFCON only
at the joints.
Praveen Kr.
Research scholar, IIT Roorkee

On Thu, 30 Jan 2003 jaiganesh09@yahoo.com wrote:

Quote:

Hi all
I wish to put forward my question that i had experienced practically in site . How good the confinement of Stirrups at beam column junction are practically possible during construction.Because the Barbender who do this work he is telling some blame excuses that its difficult to do the confinement.
Is there is any alternative method to do this
M.JaiGanesh  


Saluting our Real HERO'S  
M.Jai Ganesh, Structural Dyanmics Lab , S E R C  , CSIR Campus      

Taramani ,Chennai .  PH: 2542211, 2542991 ext :-709



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ashokrajni
SEFI Member
SEFI Member


Joined: 26 Jan 2003
Posts: 11
Location: pune

PostPosted: Thu Jan 30, 2003 2:24 pm    Post subject: Confinement at beam column junction Reply with quote

Dear Jaiganesh,
IS 13920 suggests to keep spacing of confining
reinforcement Min to 100 mm in beams and 75mm in columns. Practically there
should be no problem in fabrication and provisioning of stirrups at this
spacings. Also concrete can be comfortably placed and compacted with these
spacings. The requirement in beams and columns is to design section size,
main bar distribution along sides, and size of stirrups in such a way that
spacing required do not fall below min values specified.
akmathur
----- Original Message -----
From: <jaiganesh09@yahoo.com>
To: <ashokrajni@rediffmail.com>
Sent: 30 January 2003 Thursday 12:58
Subject: Confinement at beam column junction


Quote:

Hi
I wish to put forward my question that i had experienced practaclly in
site . How good the confinement of Stirrups at beam column junction are
practically possible during construction.Because the Barbender who do this
work he is telling some blame excuses that its difficult to do the
confinement.
Quote:
Is there is any alternative method to do this
M.JaiGanesh




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anand_pandey
SEFI Member
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Joined: 26 Jan 2003
Posts: 4

PostPosted: Sun Feb 02, 2003 4:30 am    Post subject: Confinement at beam column junction Reply with quote

Yes,
it is really difficult for common construction persons.

The bar bender has to be personally supervised by the engineer who
understand the behaviour of stirrups, lap length etc. In fact, this is an
need to be learnt by engineer as well as bar bender by systematic planning.

It has to be planned in advance before placing of bars in situ. Once fixed
it is practically impossible.

Use of column stirrpus by lapping 2 U shape bars and placing of beam bars in
a systematic way are the ways to achieve it. The bar bender practically
needs to be trained by the enginner in charge at site with the help of
design engineer.

Hope it may throw some light on common problem by the enginners who wish to
implement ductile detailings in practice.

The fact should be remembered that ductile detailing and distortion free
symmetrical structural planning is a more imporatnt factor than designing
the structures for seismic loads.

Anand Pandey
-----Original Message-----
From: jaiganesh09@yahoo.com <jaiganesh09@yahoo.com>
To: anand_pandey@mantraonline.com <anand_pandey@mantraonline.com>
Date: Thursday, January 30, 2003 12:39 PM
Subject: Confinement at beam column junction



Hi
I wish to put forward my question that i had experienced practaclly in site
. How good the confinement of Stirrups at beam column junction are
practically possible during construction.Because the Barbender who do this
work he is telling some blame excuses that its difficult to do the
confinement.
Is there is any alternative method to do this
M.JaiGanesh




---------------------------------

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