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Design of Two way slab with wall load

 
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G.Manjunath
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PostPosted: Fri Sep 23, 2011 10:03 am    Post subject: Design of Two way slab with wall load Reply with quote

Respected sefiens,

Can any one guide me how can i design the two way continuous/discontinuous slab with  200/230 mm thick  wall on it.

Thanks
Manju
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mofizahmed
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PostPosted: Fri Sep 23, 2011 12:06 pm    Post subject: Reply with quote

General procedure:Calculate the total wall load(volume x unit weight ) divide it by total area of slab.You will get load in terms of unit/area (e.g. Kn/m2),add this load to other loads like live,dead,sdl,etc. to get design load.Now design as per is 456,you can refer to any standard book of RCC.For rigorous analysis you can use Yield line method,plate theory or even FEM.Lots of related topic is available in this forum,do a search.
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rajancivildesign@gmail.co
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PostPosted: Fri Sep 23, 2011 1:59 pm    Post subject: Bending moment for wall supporting two way slab Reply with quote

Dear SAFIAN,
The bending moment due partition wall (along short and long wall or both directions) can be calculated using the formula based on Pigeaud's theory as given in Reynold's hand book or
hand book published by
PWD/Tamil nadu with worked out example.
V.M.RAJAN.
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aditya
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PostPosted: Fri Sep 23, 2011 2:08 pm    Post subject: Reply with quote

Dear Eng. Rajan,
Can you give me reference rom where I can download or purchase the handbook published by Tamilnadu PWD?

with thanks,
Aditya
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rajancivildesign@gmail.co
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PostPosted: Sat Sep 24, 2011 5:26 am    Post subject: PWD Mini Technical Hand Book-2011 Reply with quote

Dear Aditya,
This year Tamil Nadu PWD have released Mini Technical Hand Book-2011 (consolidated). The cost of book is Rs.300/ You can get it by courier/post from following address:
The Secretary-Publication,
Assistant Engineers' Association,
TamilNadu P.W.D.
Cheppakkam, Chennai-600 005.
Phone 044-2842345.
Thank you,
V.M.RAJAN.
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thirumalaichettiar
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PostPosted: Sat Sep 24, 2011 5:42 am    Post subject: Reply with quote

The references have already been posted in the Sefi forum long times back under the same topic and one has to take some pain to browse and find out rather than posting again.
The tel no. furnished by Egr. Rajan is not correct and the correct number is 044-28515445

T.Rangarajan.
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vikram.jeet
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PostPosted: Sat Sep 24, 2011 6:31 am    Post subject: Design of Two way slab with wall load Reply with quote

Procedure given by Er Mofiz Ahmed is generally followed .
Just to add that it would be appropriate if a factor of 1.5 may be multiplied to  
the equivalent UD loading (worked based on total wall load/slab area)
to take care of concentration effect of partition load .

Is code 875 about light parttion loading indicate that partition loading
on slab as equiv UD ( in terms of Kg/m2) may be taken as 1/3rd of parttion
load (in Kg/m) .
This could also be checked and higher of the parttion loading from
two computations can be used in design.

best regds

vikramjeet





General procedure:Calculate the total wall load(volume x unit weight ) divide it by total area of slab.You will get load in terms of unit/area (e.g. Kn/m2),add this load to other loads like live,dead,sdl,etc. to get design load.Now design as per is 456,you can refer to any standard book of RCC.For rigorous analysis you can use Yield line method,plate theory or even FEM.Lots of related topic is available in this forum,do a search.
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ibarua
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PostPosted: Sat Sep 24, 2011 12:47 pm    Post subject: Design of Two way slab with wall load Reply with quote

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24th Sept 2011

For a brick wall resting on a slab, it will be more accurate to calculate Mx and My from an equation derived from plate bending theory (see Timoshenko & Winowsky-Kreiger -- 'Theory of Plates & Shells'). We have developed a program for simply supported slabs. For slabs restrained at the edges, the problem is somewhat more complicated. However, we may safely use 80% of the sagging moment in simply supported slabs for designing slabs restrained at the edges.

Indrajit Barua.

From: vikram.jeet <forum@sefindia.org>
Sent: Sat, 24 Sep 2011 12:19:55
To: general@sefindia.org
Subject: [SEFI] Re: Design of Two way slab with wall load
           Procedure given by Er Mofiz Ahmed is generally followed .
Just to add that it would be appropriate if a factor of 1.5 may be multiplied to
the equivalent UD loading (worked based on total wall load/slab area)
to take care of concentration effect of partition load .

Is code 875 about light parttion loading indicate that partition loading
on slab as equiv UD ( in terms of Kg/m2) may be taken as 1/3rd of parttion
load (in Kg/m) .
This could also be checked and higher of the parttion loading from
two computations can be used in design.

best regds

vikramjeet





General procedure:Calculate the total wall load(volume x unit weight ) divide it by total area of slab.You will get load in terms of unit/area (e.g. Kn/m2),add this load to other loads like live,dead,sdl,etc. to get design load.Now design as per is 456,you can refer to any standard book of RCC.For rigorous analysis you can use Yield line method,plate theory or even FEM.Lots of related topic is available in this forum,do a search.
-- ­­

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Kumar_Abhishek_Singh
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PostPosted: Mon Sep 26, 2011 12:00 pm    Post subject: Reply with quote

I think yield line analysis will give better results, for a slab with a line load.
_________________
Thank you,
Kumar Abhishek Singh

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G.Manjunath
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PostPosted: Mon Sep 26, 2011 1:56 pm    Post subject: Reply with quote

thanks everybody. Yes i also personally feel that yield line theory gives the better result. but i wanted to know any easy approximation solutions. I will try the methods explained from the seniors


Thanks

Manju
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