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aslam SEFI Member
Joined: 10 Feb 2014 Posts: 15
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Posted: Thu Sep 05, 2019 7:00 am Post subject: Design of RC column |
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Dear Sir,
Congratulations for your great effort.
The sheet works fine. However I think the Ast you get is comparatively higher.
Fck= | 20 | N/MM2 | 8.888889 | | | | Fy= | 415 | N/MM2 | | | | | P= | 1000 | KN | 500 | | | | Mx= | 230 | KNM | 230 | *less than min eccentricity* | My= | 230 | KNM | 230 | *less than min eccentricity* | Bx= | 500 | MM | | | | | Dy= | 500 | MM | | | | | As= | 8631.004 | MM2 | | | | | | | | | | | | ex= | 230 | 230 | 25 | | | | ey= | 230 | 230 | 25 | | | | A1= | 250000 | | | | | | A2= | 921600 | | | | | | As1= | 0 | | | | | | As2= | 8631.004 | | | | | | | 8631.004 | | | | | |
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mohd_arastu SEFI Regulars
Joined: 21 Dec 2011 Posts: 24 Location: Delhi
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Posted: Thu Sep 05, 2019 7:30 am Post subject: A New idea for RCC COLUMN design |
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Hi, can you please share the excel file?
On Thu, Sep 5, 2019, 9:54 AM rg.gupta <forum@sefindia.org (forum@sefindia.org)> wrote:
Quote: | Dear Manoharbs
Jai Hind
It is advised in future pl do not make any comment in haste ,before you make a proper study of the case in depth & get the feed back.
Now it is suggested to go through the results of some of the solved examples of SP-16 of BIS ,Author A.K.Jain & Authors Karve & Shah Books on RCC
and comparison with My program results as given below:
1) SP-16 of 1980
a) Exp. 5 on page 99
b) Exp. 6 on page 103
c) Exp. 7 on page 103
d) Exp. 8 on page 105
e) Exp. 9 on page 107
2) A.K JAIN
a) Exp. 16.8 on page 493
b) Exp. 16.9 on page 495
c) Exp. 16.10 on page 496
3) KARVE & SHAH
a) Exp. 4-1 on page 787
b) Exp. 9.6-1 on page 878
c) Exp 9.6-2 on page 879
d) Exp. 9.6-3 on page 881
e) Exp. 9.6-4 on page 882
f) Exp. 9.7-1 on page 885
As there are so many softwares available here such as strap1,staad & Etab etc ,the results obtained from them are at variance also with consultant to consultant.
It is further clarified that this concept /research is at a very initial stage, may invite some minor modifications such as effective cover etc. are underway
which will have minor impact even now the results obtained are comparable with any body's as these results are based on basic fundamentals are perfect
& genuine .
R G GUPTA S.E(Retd.)
CDO/DDA
rg.gupta41@gmail.com (rg.gupta41@gmail.com) (rg.gupta41@gmail.com (rg.gupta41@gmail.com))
9718829191
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N. Prabhakar General Sponsor
Joined: 25 Apr 2009 Posts: 474
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Posted: Thu Sep 05, 2019 1:13 pm Post subject: |
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Dear Er R G Gupta.
I have one doubt. The examples shown in your Excel sheets consider only short columns. Is your method applicable for long and slender columns as defined in IS code?
Please don't get angry if I have asked a silly question.
With kind regards,
N. Prabhakar
Chartered Structural Engineer
Vasai (E), Pin 401 208
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rg.gupta ...
Joined: 26 Jan 2003 Posts: 95
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Posted: Fri Sep 06, 2019 4:30 am Post subject: A New idea for RCC COLUMN design |
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Dear Shree N. PRABHAKAR
jai hind
No Sir ,Not at all. If some body without going through the details & passes a immatured remark ,then It becomes unbearable ,
without knowing that I am working on this concept for more than 10 years .
My special thanks to Sh V.H.VARYANI for his remarkable comments as well as his moral supports extended on this subject.
Regarding for your query for slender columns, It is ready for release & will be posted on SEFI .
When atleast 50 of our distinguish members of SEFI & their valuable comments are received & their suggestions are duly incorporated.
I hope this program will prove to be most remarkable work for the design of RCC Slender of any size & shape after my next posting.
& all authorities of the world in the field will definitely surprised that the RCC column Design becomes to easy to believe & the results
are ready simultaneous to inputs given within seconds.
R G GUPTA S.E.(Retd)
CENTRAL DESIGN ORGANISATION
DELHI DEVELOPMENT AUTHORITY
rg.gupta41@gmail.com (rg.gupta41@gmail.com)
91-9718829191
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Sufiyan_choksi SEFI Member
Joined: 18 Jun 2019 Posts: 1
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Posted: Fri Sep 06, 2019 5:30 am Post subject: A New idea for RCC COLUMN design |
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thanks can we talk?may i have your book?
On Fri, Sep 6, 2019 at 10:31 AM uhvaryani <forum@sefindia.org (forum@sefindia.org)> wrote:
Quote: | Dear Sefians, The work of Er.R.G.Gupta on column design is original and it is highly appreciated.I wish to give here the work already done by other engineers in the field of RCC column design.Most of the work available refers to rectangular and circular sections.For other sections like L-shaped,T-shaped or triangular shaped columns,we need more work.I hope Er,R.G.Gupta's method can be applied to these shapes too.
Ghanekar and Chandra's Handbook is being used extensively in design offices.
Professor S.N.SINHA and his students of IIT,Delhi have extensive work in this field.
Professor Sinha's HANDBOOK is very useful in design offices.Varyani's book on
Biaxial Bending of Reinforced Concrete Members is also a useful reference on this subject.
Engineers who have time and inclination should solve a few examples by different methods and get these compared with Er.R.G.Gupta's method for verification.
The work of Er.R.G.Gupta is highly commended and it can be used in design offices.
with best wishes and regards,
uhvaruani
9560435030
Virus-free. www.avg.com
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sushil_singh SEFI Member
Joined: 17 Dec 2012 Posts: 13
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Posted: Fri Sep 06, 2019 1:05 pm Post subject: Re: A New idea for RCC COLUMN design |
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Is the original post deleted? Can 't see it.
sukanta.adhikari wrote: | DEL |
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rg.gupta ...
Joined: 26 Jan 2003 Posts: 95
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Posted: Fri Sep 06, 2019 3:30 pm Post subject: COL DESIGN |
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dear sefians
jai hind
as some query was raised by a member ,this was duly clarified by re- sending the excel file over
the inputs of example no 8 of SP-16 on page 105 for information to all.
R G GUPTA
- Forwarded message
From: Rg Gupta <rg.gupta41@gmail.com (rg.gupta41@gmail.com)>
Date: Fri, Sep 6, 2019 at 7:03 PM
Subject: Re: COL DESIGN
To: Gunaseelan M <guna132001@gmail.com (guna132001@gmail.com)>
Jjai Hind
Thanks for your sincere comments .
Pl see the attached file for details as per inputs given on page 105 of example 8 of SP-16 .
It is further clarified that the moments i.e. Mx is parallel to Bx and My is parallel to Dy and re-execute and discuss.
R G GUPTA
On Fri, Sep 6, 2019 at 5:41 AM Gunaseelan M <guna132001@gmail.com (guna132001@gmail.com)> wrote:
[quote]Dear R.G. Gupta Ji Namaskar. CONGRATULATIONS for good initiative.
I have gone through your Excell col design programme, compared with the worked out example of col biaxial design given in SP-16. The following notations are not clear in your programme,so i have assumed as follows
1. P AXIAL UN-FACTORED LOAD
2. MX UN-FACTORED MOMENT ABOUT X AXIS
3. MY UN- FACTORED MOMENT ABOUT Y AXIS
Accordingly the result steel area given your programme is As= 3428 sq.mm against 3053 sq.mm
a difference of 12.28% on higher side.
M.Gunaseelan
EXE.ENGINEER(RETD) CPWD. CHARTERED ENGINEER
Structural Consultant
BENGALURU-560076
mobile: 9445562080
On Wed, Sep 4, 2019 at 8:01 PM Gunaseelan M <guna132001@gmail.com (guna132001@gmail.com)> wrote:
[quote]Ok, I will do it.
gunaseelan
On Wed, 4 Sep 2019, 6:29 pm Rg Gupta, <rg.gupta41@gmail.com (rg.gupta41@gmail.com)> wrote:
[quote]DEAR GNASEELAN M
JAI HIND
pl find attached herewith the excel file as requested .it will be appreciated if you pl compare this program with your past work of at least for 10 nos of design of columns and send a report of these results.
thanks
R G GUPTA
On Wed, Sep 4, 2019 at 4:30 AM Gunaseelan M <guna132001@gmail.com (guna132001@gmail.com)> wrote:
[quote]PL SEND THE EXCEL SHEET FOR STUDYING.
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sukanta.adhikari General Sponsor
Joined: 26 Jan 2003 Posts: 726
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Posted: Sat Sep 07, 2019 12:41 pm Post subject: Re: A New idea for RCC COLUMN design |
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Dear sushil sir
Actually the original post was deleted .So I also deleted my post.
Regards
S adhikari
sushil_singh wrote: | Is the original post deleted? Can 't see it.
sukanta.adhikari wrote: | DEL |
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N. Prabhakar General Sponsor
Joined: 25 Apr 2009 Posts: 474
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Posted: Sun Sep 08, 2019 6:34 am Post subject: |
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Dear Sefians,
I have developed Excel spreadsheets for the design of several RC members which includes rectangular and circular columns subjected to axial compression/tensile load, uniaxial/biaxial moments, short/long columns by limit-state method as per IS: 456 - 2000. It also includes calculation of effective length of column as per Clause 25.2 (Annex E) of IS:456-2000.
For details, please visit my website www.rcdesignspreadsheets.com.
A sample of Excel sheets for design of rectangular columns is attached herewith.
With best wishes,
N. Prabhakar
Chartered Structural Engineer
Vasai (E), Pin 401 208
Mobile: 9322199254
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Rectangular Column - Biaxial Bending.docx |
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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 Sep 09, 2019 8:37 pm Post subject: Re: A New idea for RCC Column design |
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Dear All,
I second the views expressed by our respected Er Varyani Sir and wish to appreciate Er R.G. Gupta for his original work-the earlier version of his equations was published in the Indian Concrete Journal.
Regards
NS
uhvaryani wrote: | Dear Sefians, The work of Er.R.G.Gupta on column design is original and it is highly appreciated.I wish to give here the work already done by other engineers in the field of RCC column design.Most of the work available refers to rectangular and circular sections.For other sections like L-shaped,T-shaped or triangular shaped columns,we need more work.I hope Er,R.G.Gupta's method can be applied to these shapes too.
Ghanekar and Chandra's Handbook is being used extensively in design offices.
Professor S.N.SINHA and his students of IIT,Delhi have extensive work in this field.
Professor Sinha's HANDBOOK is very useful in design offices.Varyani's book on
Biaxial Bending of Reinforced Concrete Members is also a useful reference on this subject.
Engineers who have time and inclination should solve a few examples by different methods and get these compared with Er.R.G.Gupta's method for verification.
The work of Er.R.G.Gupta is highly commended and it can be used in design offices.
with best wishes and regards,
uhvaruani
9560435030
Virus-free. www.avg.com
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