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rajancivildesign@gmail.co ...
Joined: 26 Jan 2011 Posts: 564
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Posted: Wed Mar 04, 2020 2:59 pm Post subject: Partition walls on slab design |
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Dear SAFIANS,
IS 456-2000 will give only indicative guidelines on loading of partition walls on slab. The design procedure is not so elaborate as given in Reynolds or any design reference books to guide the designer how to design a partition wall over one way or two way slab comes. A detailed procedure on partition wall on one way and two way slab is presented with some case study problem to give a clear idea for designer for their reference.
V.M.RAJAN
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whitenoise SEFI Member
Joined: 26 Jan 2003 Posts: 4
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Posted: Fri Mar 06, 2020 7:12 am Post subject: REVISION OF IS:456-2000:limit states |
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Dear Members,
You may be aware that there will be 6 'limit state's in the proposed revision of IS:456.
A natural doubt is how to decide the number of limit states ?
What is the basis?
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rajancivildesign@gmail.co ...
Joined: 26 Jan 2011 Posts: 564
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Posted: Fri Mar 06, 2020 2:20 pm Post subject: Limit state method |
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As per existing code there are two states Limit state of collapse and Limit state of serviability. Only after receiving new code, we may know all 6 states of limit state. If any one knows the draft can ellaporate if they knows.
V. M. Rajan.
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whitenoise SEFI Member
Joined: 26 Jan 2003 Posts: 4
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Posted: Sat Mar 07, 2020 5:17 am Post subject: Limit state design |
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If we accept that a 'limit state' is a design scenario wherein the structure or a member of the structure approaches a 'limiting condition' or a 'failure condition', in that case we need to have a tool to quantify it.
I wonder how to quantify limit state of 'integrity'.
Although the current philosophy of 'limit state' is largely based on the failure of a member rather than failure of the structure as a whole,the limit state of 'integrity' has something to do with the whole structure, not a single column or beam !
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whitenoise SEFI Member
Joined: 26 Jan 2003 Posts: 4
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Posted: Sat Mar 07, 2020 5:26 am Post subject: Limit state design |
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'Capacity design' principles are usually encountered while designing the structure for seismic load.
Does it not relevant also in case of gravity load design?
Can we connect these two names in some way: limit state design and capacity-design ?
That is to say, when we do limit state design for flexure and shear, we intentionally keep the failure probability due to flexure to be higher than that for shear. Is it not the 'capacity-design' ?
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rajancivildesign@gmail.co ...
Joined: 26 Jan 2011 Posts: 564
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Posted: Tue Mar 17, 2020 2:06 pm Post subject: Frame Analysis for vertical and horizontal load |
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I herewith attached analysis of frame material for refrence.
V.M.RAJAN
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rajancivildesign@gmail.co ...
Joined: 26 Jan 2011 Posts: 564
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Posted: Tue Mar 17, 2020 2:57 pm Post subject: Toilet slab without beam support |
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Design of toilet slab without folding beam at intermediate support is attached for reference.
V.M.RAJAN
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Dr. N. Subramanian General Sponsor
Joined: 21 Feb 2008 Posts: 5538 Location: Gaithersburg, MD, U.S.A.
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Posted: Mon Apr 27, 2020 3:50 pm Post subject: Re: Suggested IS 456 Shear Design Provisions |
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I am glad that Prof. Sahoo at Indian Institute of Technology,Delhi has proposed some new equationsfor the shear strength of RC beams in the two papers published in the April 2020issue of ICJ, which will be inclided in the future version of IS 456.
My views about the same are enclosed.
Prof. Sahoo's reply to these comments will be published in the May issue of ICJ.
I am enclosing it here for other engineers who may want to know the future changes in IS 456.
Best wishes
NS
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eswar_reddy General Sponsor
Joined: 01 Jul 2020 Posts: 5
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Posted: Wed Jul 22, 2020 6:53 am Post subject: Re: Proposed REVISION OF IS:456-2000- Inviting Comments |
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It's really a great news sir.
It would be better if, we have added the concrete design requirements like edge distance, embedment length, concrete pryout etc for the anchor bolt design in IS 456 itself.
Provision of the same as a reference in IS 800 also would be appreciable (at the time of it's next revision).
I am aware, you (Dr. N. Subramanian) have already illustrated these requirements in one of your publications which I also strongly recommend.
Dr. N. Subramanian wrote: | Dear All,
I came to know from Mr Sanjay Pant, Director (Civil Engineering)
Bureau of Indian Standards, that they are going to take up the revision of IS 456 soon. Hence our Er Mallick proposed the idea of collecting comments from our SEFIans, which can be passed on to BIS. Hence I am starting this Tread. Please post your comments only in this tread and not in several other places.
Best wishes,
Subramanian |
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MAHAKUL SEFI Member
Joined: 26 Feb 2009 Posts: 14
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Posted: Thu Aug 06, 2020 3:47 am Post subject: Re: Proposed REVISION OF IS:456-2000- Inviting Comments |
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sunilgurtoo wrote: | Dear SEFI members,
For the Flat Plat Construction, IS codes should include the use of STUD Rails /Punching Shear Reinforcement which is mostly used as per US codes In us and other parts of the world.
I have seen lot of stuff from internet for the stud rail and punching shear reinforcement technology, but IS codes being the main governing guidelines, it should include the same.
Regards,
Sunil Gurtoo
pune
From: hemal [mailto:forum@sefindia.org]
Sent: 09 January 2013 17:47
To: general@sefindia.org
Subject: [SEFI] Re: Proposed REVISION OF IS:456-2000- Inviting Comments
Dear Sefi Members,
I hope future revision of IS:456 will include section property modifiers (i.e. for I, A etc) for various structural elements (i.e. column, shear wall, link beam, beam, slab etc of RC & PT) to account for cracking for basic guidelines.
Regards
Hemal Mistry
Surat
On Tue, 8/1/13, Dr. N. Subramanian wrote:
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