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BVRAO
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Joined: 21 Sep 2009
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 Posted: Tue Mar 03, 2020 6:35 amPost subject: |
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Chart for Fy 550 steel
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N. Prabhakar
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Joined: 25 Apr 2009
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| Posted: Tue Mar 03, 2020 1:30 pmPost subject: Proposed REVISION OF IS:456-2000- Inviting Comments |
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Regarding the use of high grade reinforcement bars of fy500 and fy550, which Mr. Rajan has raised in his posting, I have a strong reservation of it in using for earthquake-resistant structutes as ductility requirement is necessary for inelastic deformation of structural members. More than 70% of cities in India come under Seismic Zone III and above where ductile detailing is a must.�
I am attaching two technical papers on this subject which may be of interest to SEFI �readers.
With best wishes,
N. Prabhakar
Chartered Structural Engineer
Vasai (E)
On Tue, Mar 3, 2020, 3:52 PM Dr. N. Subramanian forum@www.buonovino.com)> wrote:
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With reference to Er Rajan's question, I also want the committee preparing the Draft to the next revision of IS 456 to include the properties of steel reinforcement in the form of a table in IS 456 itself, instead of referring to IS 1786, with a note on the ductility of steel to be used on earthquake resistant structures.
Warm regards
Subramanian
rajancivildesign@gmail.co (rajancivildesign@gmail.co) wrote:Dear sir
I have one doubt. The design aid to IS456-1978(SP16) was prepared in 1980. At that time steel grade fy415 is in use. So design aid was prepared for steel grade up to Fy500. Now steel grade fy550 is common in the market, there is no reference of constant parameters in the IS456-2000 and there is no chart or table to refer values for design columns or beams manually. To my knowledge most of the commercial pakages use only up to steel grade Fy500 only. Kindly suggest to incorporate some guide lines for design parameter in the proposed code of IS456.
V. M. Rajan.
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Problems_of_using_High_Grade_Steel_in_Constructions.pdf |
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Ductility_Paper.pdf |
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rajancivildesign@gmail.co
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Joined: 26 Jan 2011
Posts: 563
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| Posted: Tue Mar 03, 2020 2:12 pmPost subject: Chart for Fy550 steel |
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Dear BV Rao sir,
谢谢你介绍钢表550. It will be very useful. sorry sir, I have seen your chart after posting here. Anyhow I want to include some basic design parameters for higher strength of steel say 550 in the upcoming revision in the proposed code IS456 for designing beams and columns. Dear B.V.Rao sir can you send the attachement directly to my email sir. email idrajancivildesign@gmail.com.
V.M.RAJAN |
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rajancivildesign@gmail.co
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Joined: 26 Jan 2011
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| Posted: Tue Mar 03, 2020 3:49 pmPost subject: use of fe 550 steel for SMRF |
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Dear Prabhakar sir,
I fully agree with your view on use of fe 550 steel from earthquake
point of view.Is there any mention about use of steel fe 550 conforming to IS1786 about permissible elongation for steel to be adopted in zone 3 and above for seismic design in IS1893-2016. For zone 2 and gravity elements Fe550 can be used. if fe 550 steel is not to be used/ not suitable for SMRF
even though the elongation is within permissible limit, what is the purpose of manufacturing steel grade fe 550 in india. If steel of grade fe 415 and fe 500 are not available in the market, what is the alternate source to use for construction of multistoreyed rcc building design.
V.M.RAJAN. |
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rajancivildesign@gmail.co
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Joined: 26 Jan 2011
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| Posted: Tue Mar 03, 2020 4:01 pmPost subject: Use of fe550D steel bars |
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Sir
Whether we can use TMT bars of Fe500D, Fe550D bars having elongation as per IS13920 can be adopted for seismic zone 3,4 and 5. Kindly give your views.
V. M. Rajan. |
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BVRAO
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Joined: 21 Sep 2009
Posts: 47
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| Posted: Tue Mar 03, 2020 5:39 pmPost subject: Re: Chart for Fy550 steel |
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| rajancivildesign@gmail.co wrote: |
Dear BV Rao sir,
谢谢你介绍钢表550. It will be very useful. sorry sir, I have seen your chart after posting here. Anyhow I want to include some basic design parameters for higher strength of steel say 550 in the upcoming revision in the proposed code IS456 for designing beams and columns. Dear B.V.Rao sir can you send the attachement directly to my email sir. email idrajancivildesign@gmail.com.
V.M.RAJAN |
Sir,
The charts can be generated in the " Column Design Software" available in this same post page No. 13 . For any d'/D, ( b'/B) ratio and for any grade ( 415, 500 ,550) and 2 sides (or) 4 sides equal steel which are not available in SP-16.
Especially for 2 sides equal steel ,No charts for b'/B ratio of the section is provided in SP-16 . With out these charts Column Design with Two sides Steel is not possible.( Biaxial) .
The above software is posted about 3 years back . No body is responding.
You can design for any Grade , any steel for selected dia , combination , maintaining minimum spacing , economy as per the procedure given in the SP-16. You can check already provided steel section also. you can print the design . calculations also can see at glance including sp -16 chart curves along with other possible options.
Last edited by BVRAO on Wed Mar 04, 2020 8:04 am; edited 1 time in total |
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Dr. N. Subramanian
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Joined: 21 Feb 2008
Posts: 5537
Location: Gaithersburg, MD, U.S.A.
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| Posted: Tue Mar 03, 2020 6:01 pmPost subject: Re: Chart for Fy550 steel |
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Excellent Er B.V. Rao. I appreciate your efforts
Warm regards
Subramanian
| BVRAO wrote: |
| rajancivildesign@gmail.co wrote: |
Dear BV Rao sir,
谢谢你介绍钢表550. It will be very useful. sorry sir, I have seen your chart after posting here. Anyhow I want to include some basic design parameters for higher strength of steel say 550 in the upcoming revision in the proposed code IS456 for designing beams and columns. Dear B.V.Rao sir can you send the attachement directly to my email sir. email idrajancivildesign@gmail.com.
V.M.RAJAN |
Sir,
The charts can be generated in the " Column Design Software" available in this same post page No. 13 . For any d'/D, ( b'/B) ratio and for any grade ( 415, 500 ,550) and 2 sides (or) 4 sides equal steel which are not available in SP-16.
Especially for 2 sides equal steel ,No charts for b'/B ratio of the section is provided in SP-16 . With out these charts Column Design with Two sides Steel is not possible.( Biaxial) .
The above software is posted about 3 years back . No body is responding , especially you.
You can design for any Grade , any steel for selected dia , combination , maintaining minimum spacing , economy as per the procedure given in the SP-16. You can check already provided steel section also. you can print the design . calculations also can see at glance including sp -16 chart curves along with other possible options. |
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BVRAO
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Joined: 21 Sep 2009
Posts: 47
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| Posted: Tue Mar 03, 2020 6:15 pmPost subject: Re: Chart for Fy550 steel |
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[quote="Dr. N. Subramanian"]Excellent Er B.V. Rao. I appreciate your efforts
Warm regards
Subramanian
Thank You Very much Sir, You appreciation unforgettable Sir, No words to me to express my feelings
B. Venkateswra Rao |
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rajancivildesign@gmail.co
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Joined: 26 Jan 2011
Posts: 563
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| Posted: Wed Mar 04, 2020 2:35 pmPost subject: RCC design ready reckoner |
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Dear SAFIANS,
I herewith attached some useful information tables for ready reckoner
for RCC members for members use.
V.M.RAJAN
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Ready reconer.pdf |
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rajancivildesign@gmail.co
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Joined: 26 Jan 2011
Posts: 563
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| Posted: Wed Mar 04, 2020 2:57 pmPost 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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Partition wall on slab.pdf |
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