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Shear wall thickness

 
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ajaynkadam
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Location: Pune, India

PostPosted: Wed Aug 01, 2018 3:26 am    Post subject: Shear wall thickness Reply with quote

Dear sefians,

Should the thickness of a sheat wall be 20 times bar diameter of the beam rigidly connected to the shear wall from its lateral direction? When can this clause be ignored.

Ajay Kadam
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shishir_dhawade1
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PostPosted: Wed Aug 01, 2018 4:30 pm    Post subject: Shear wall thickness Reply with quote

If orthogonal beam resting on shear wall is released at shear wall then there will be say 2 tor 8 MM bars at top.But IS 1893 says mnimum 2 % steel is required at top and bottom.Then this steel will give moment resisting capacity to beam and this MR will be transfered to the shear wall and so ths beam can not be released. Again IS 456 (many of us have forgotten it ) says redistribution of moments can not be more than 25 % .So ortho beam on shear wall can not be released and the wall will have to be designed as column also.From: "ajaynkadam" <forum@sefindia.org>Sent: Wed, 01 Aug 2018 20:40:39To: general@sefindia.orgSubject: [SEFI] Shear wall thicknessDear sefians,Should the thickness of a sheat wall be 20 times bar diameter of the beam rigidly connected to the shear wall from its lateral direction? When can this clause be ignored.Ajay Kadam
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nagesh_ghadge
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PostPosted: Fri Aug 03, 2018 6:30 pm    Post subject: Shear wall thickness Reply with quote

Sir will you please tell us the clause of IS 1893 which specifies minimum 2% reinforcement in beams.

Regards,
Ghadge Nagesh.


On 2 Aug 2018 9:35 a.m., "shishir_dhawade1" <forum@sefindia.org (forum@sefindia.org)> wrote:[quote]            If orthogonal beam resting on shear wall is released at shear wall then there will be say 2 tor 8 MM bars at top.But IS 1893 says mnimum 2 % steel is required at top and bottom.Then this steel will give moment resisting capacity to beam and this MR will be transfered to the shear wall and so ths beam can not be released. Again IS 456 (many of us have forgotten it ) says redistribution of moments can not be more than 25 % .So ortho beam on shear wall can not be released and the wall will have to be designed as column also.From: "ajaynkadam" Sent: Wed, 01 Aug 2018 20:40:39To: general@sefindia.orgSubject (general@sefindia.orgSubject): [SEFI] Shear wall thicknessDear sefians,Should the thickness of a sheat wall be 20 times bar diameter of the beam rigidly connected to the shear wall from its lateral direction? When can this clause be ignored.Ajay Kadam

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sangeeta_wij
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PostPosted: Mon Aug 06, 2018 8:30 am    Post subject: Shear wall thickness Reply with quote

All columns have to be min 20 dia of beam bars but not Shear Walls, and the minimum thickness maybe selected based on your Project requirements and I893 provisions.




Best Regards
Sangeeta Wij
President,WISE India
Managing Partner
SD Engineering Consultants LLP
Vice President(North),Indian Association of Structural Engineers,
Fellow and Chartered Engineer, Institution of Engineers
H333 New Rajinder Nagar(Lower Ground Floor),
New Delhi-110060
Ph:9811776210;01145128530


From: shishir_dhawade1 [mailto:forum@sefindia.org]
Sent: 02 August 2018 09:34
To: general@sefindia.org
Subject: [SEFI] Re: Shear wall thickness



If orthogonal beam resting on shear wall is released at shear wall then there will be say 2 tor 8 MM bars at top.But IS 1893 says mnimum 2 % steel is required at top and bottom.Then this steel will give moment resisting capacity to beam and this MR will be transfered to the shear wall and so ths beam can not be released. Again IS 456 (many of us have forgotten it ) says redistribution of moments can not be more than 25 % .So ortho beam on shear wall can not be released and the wall will have to be designed as column also.From: "ajaynkadam" Sent: Wed, 01 Aug 2018 20:40:39To: general@sefindia.orgSubject (general@sefindia.orgSubject): [SEFI] Shear wall thicknessDear sefians,Should the thickness of a sheat wall be 20 times bar diameter of the beam rigidly connected to the shear wall from its lateral direction? When can this clause be ignored.Ajay Kadam

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prakashsiyani
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PostPosted: Tue Aug 07, 2018 1:32 pm    Post subject: Re: Shear wall thickness Reply with quote

Dear Sir

As per my suggestion thickness is not more matter but outer element edge stress must be lesser than 0.2fck. and for that we have to increase thickness beyond our thinking limited thickness of wall

Prakash


ajaynkadam wrote:
Dear sefians,

Should the thickness of a sheat wall be 20 times bar diameter of the beam rigidly connected to the shear wall from its lateral direction? When can this clause be ignored.

Ajay Kadam
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ajaynkadam
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Joined: 17 Jan 2009
Posts: 25
Location: Pune, India

PostPosted: Mon Aug 13, 2018 1:53 am    Post subject: Re: Shear wall thickness Reply with quote

Ms Sangeeta,

Please go through Clause 10.3.1 of IS 13920 and amendments to the Clause 9.1.3 of IS 13920 and you will know that shear walls must have width equal to 20 times bar diameter of the beams rigidly connected to the shear wall in the lateral direction.

Regards,

Ajay Kadam
M.S.(Structure)USA


sangeeta_wij wrote:
All columns have to be min 20 dia of beam bars but not Shear Walls, and the minimum thickness maybe selected based on your Project requirements and I893 provisions.




Best Regards
Sangeeta Wij
President,WISE India
Managing Partner
SD Engineering Consultants LLP
Vice President(North),Indian Association of Structural Engineers,
Fellow and Chartered Engineer, Institution of Engineers
H333 New Rajinder Nagar(Lower Ground Floor),
New Delhi-110060
Ph:9811776210;01145128530


From: shishir_dhawade1 [mailto:forum@sefindia.org]
Sent: 02 August 2018 09:34
To: general@sefindia.org
Subject: [SEFI] Re: Shear wall thickness



If orthogonal beam resting on shear wall is released at shear wall then there will be say 2 tor 8 MM bars at top.But IS 1893 says mnimum 2 % steel is required at top and bottom.Then this steel will give moment resisting capacity to beam and this MR will be transfered to the shear wall and so ths beam can not be released. Again IS 456 (many of us have forgotten it ) says redistribution of moments can not be more than 25 % .So ortho beam on shear wall can not be released and the wall will have to be designed as column also.From: "ajaynkadam" Sent: Wed, 01 Aug 2018 20:40:39To: general@sefindia.orgSubject (general@sefindia.orgSubject): [SEFI] Shear wall thicknessDear sefians,Should the thickness of a sheat wall be 20 times bar diameter of the beam rigidly connected to the shear wall from its lateral direction? When can this clause be ignored.Ajay Kadam

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ajaynkadam
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Joined: 17 Jan 2009
Posts: 25
Location: Pune, India

PostPosted: Mon Aug 13, 2018 1:54 am    Post subject: Re: Shear wall thickness Reply with quote

Mr Prakash,

Please go through Clause 10.3.1 of IS 13920 and amendments to the Clause 9.1.3 of IS 13920 and you will know that shear walls must have width equal to 20 times bar diameter of the beams rigidly connected to the shear wall in the lateral direction.

Regards,

Ajay Kadam
M.S.(Structure)USA



prakashsiyani wrote:
Dear Sir

As per my suggestion thickness is not more matter but outer element edge stress must be lesser than 0.2fck. and for that we have to increase thickness beyond our thinking limited thickness of wall

Prakash


ajaynkadam wrote:
Dear sefians,

Should the thickness of a sheat wall be 20 times bar diameter of the beam rigidly connected to the shear wall from its lateral direction? When can this clause be ignored.

Ajay Kadam
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B.V.Harsoda
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PostPosted: Wed Aug 15, 2018 2:34 pm    Post subject: Re: Shear wall thickness Reply with quote

Mr. Ajay Kadam,

        Yes ,You are right, Amendment No. 1 September 2017 to the clause 9.1.3 (Page 13) of IS 13920:2016 , line 2 ---Insert , 'and Shear wall' before the word ,'Parallel',  i.e Column and shear wall.



Regards,
B.V.Harsoda





ajaynkadam wrote:
Ms Sangeeta,

Please go through Clause 10.3.1 of IS 13920 and amendments to the Clause 9.1.3 of IS 13920 and you will know that shear walls must have width equal to 20 times bar diameter of the beams rigidly connected to the shear wall in the lateral direction.

Regards,

Ajay Kadam
M.S.(Structure)USA


sangeeta_wij wrote:
All columns have to be min 20 dia of beam bars but not Shear Walls, and the minimum thickness maybe selected based on your Project requirements and I893 provisions.




Best Regards
Sangeeta Wij
President,WISE India
Managing Partner
SD Engineering Consultants LLP
Vice President(North),Indian Association of Structural Engineers,
Fellow and Chartered Engineer, Institution of Engineers
H333 New Rajinder Nagar(Lower Ground Floor),
New Delhi-110060
Ph:9811776210;01145128530


From: shishir_dhawade1 [mailto:forum@sefindia.org]
Sent: 02 August 2018 09:34
To: general@sefindia.org
Subject: [SEFI] Re: Shear wall thickness



If orthogonal beam resting on shear wall is released at shear wall then there will be say 2 tor 8 MM bars at top.But IS 1893 says mnimum 2 % steel is required at top and bottom.Then this steel will give moment resisting capacity to beam and this MR will be transfered to the shear wall and so ths beam can not be released. Again IS 456 (many of us have forgotten it ) says redistribution of moments can not be more than 25 % .So ortho beam on shear wall can not be released and the wall will have to be designed as column also.From: "ajaynkadam" Sent: Wed, 01 Aug 2018 20:40:39To: general@sefindia.orgSubject (general@sefindia.orgSubject): [SEFI] Shear wall thicknessDear sefians,Should the thickness of a sheat wall be 20 times bar diameter of the beam rigidly connected to the shear wall from its lateral direction? When can this clause be ignored.Ajay Kadam

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B.V.Harsoda
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PostPosted: Wed Aug 15, 2018 3:06 pm    Post subject: Re: Shear wall thickness Reply with quote

Mr. Ajay Kadam,

   If column shall be provided to rest beam with satisfying minimum dimension as per clause 7.1.1 of IS 13920:2016 connected with shear wall then Cl. 9.1.3 can be ignored for shear wall. More comments requested from  experts please.

Regards,
B. V. Harsoda




ajaynkadam wrote:
Dear sefians,

Should the thickness of a sheat wall be 20 times bar diameter of the beam rigidly connected to the shear wall from its lateral direction? When can this clause be ignored.

Ajay Kadam
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