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jaiganesh09 SEFI Member
Joined: 26 Jan 2003 Posts: 1 Location: Thailand
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Posted: Thu Jan 30, 2003 7:30 am Post subject: Confinement at beam column junction |
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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
Joined: 26 Jan 2003 Posts: 10
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Posted: Thu Jan 30, 2003 10:30 am Post subject: Confinement at beam column junction |
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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
Joined: 26 Jan 2003 Posts: 11 Location: pune
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Posted: Thu Jan 30, 2003 2:24 pm Post subject: Confinement at beam column junction |
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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
Joined: 26 Jan 2003 Posts: 4
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Posted: Sun Feb 02, 2003 4:30 am Post subject: Confinement at beam column junction |
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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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