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  Topic: Prof. Dr. Ing. Dr. Reidar Bjorhovde passed away
Dr. N. Subramanian

Replies: 0
Views: 67

PostForum: Engineering Marvels   Posted: Tue Dec 07, 2021 6:19 pm   Subject: Prof. Dr. Ing. Dr. Reidar Bjorhovde passed away
I am sorry and sad to inform you that Prof. Reidar Bjorhovde, whose research on steel columns formed the basis of AISC column design provisions passed away on Nov. 29th due to complications of Parkins ...
  Topic: DON'T INCLUDE A CLAUSE ON DESIGN LIFE OF STRUCTURE IN IS 456
Dr. N. Subramanian

Replies: 2
Views: 545

PostForum: SEFI General Discussion   Posted: Fri Dec 03, 2021 5:17 pm   Subject: DON'T INCLUDE A CLAUSE ON DESIGN LIFE OF STRUCTURE IN IS 456
DON'T INCLUDE A CLAUSE ON DESIGN LIFE OF STRUCTURES IN IS 456


I feel that we should not include a clause in IS 456 which says for the building to have a life of 50/75/100 years we need to do such ...
  Topic: Prof. N. S. Trahair of Australia Passed away
Dr. N. Subramanian

Replies: 1
Views: 210

PostForum: Engineering Marvels   Posted: Sun Nov 21, 2021 4:46 am   Subject: Prof. N. S. Trahair of Australia Passed away
Prof. N. S. Trahair of Australia Passed away

With heavy heart I wish to report the death of one of the pioneers in Steel Structures and Structural Stability Prof. N.S. Trahair of Australia (Previou ...
  Topic: In Doubly Reinforced beams using WSM, why we get Pc greater than Pt?
Dr. N. Subramanian

Replies: 4
Views: 473

PostForum: SEFI General Discussion   Posted: Fri Nov 19, 2021 4:44 pm   Subject: In Doubly Reinforced beams using WSM, why we get Pc greater than Pt?
Someone asked this question. In tables 72 to 75 of SP 16, Pt is greater than Pc, where sigmast is 140 (fy is 250 MPa) and sigma cbc is 5 to 10.0. Whereas, In tables 76 to 79, when sigmast is 230 (fy ...
  Topic: Gems of Structural Engg - Schlaich Family - (Post-21)
Dr. N. Subramanian

Replies: 3
Views: 9687

PostForum: Engineering Marvels   Posted: Wed Nov 10, 2021 4:54 pm   Subject: Gems of Structural Engg - Schlaich Family - (Post-21)
https://www.sbp.de/fileadmin/sbp.de/bauen/Ueberdachung-Wolfsburg.jpg
Most of his projects as well of that of his company with offices in Stuttgart, Berlin, New York, Sao Paulo and Shanghai is documen ...
  Topic: Curing of Concrete at site and Laboratory Controlled Condition
Dr. N. Subramanian

Replies: 14
Views: 3721

PostForum: Speak Out Box   Posted: Fri Oct 29, 2021 7:27 am   Subject: Re: Curing of Concrete at site and Laboratory Controlled Condition
Why Concrete cube is required to submerged in Water prior to Testing age. but in the field we only sprinkle water to structural member (i.e. Column/Beam/footing), we didn't submerged structural member ...
  Topic: Regular webinars on the portal
Dr. N. Subramanian

Replies: 5
Views: 1397

PostForum: Feature Requests   Posted: Thu Oct 07, 2021 7:03 pm   Subject: Re: Regular webinars on the portal
Dear Admin,

It is time for SEFI moves into the webinar culture to spread awareness and knowledge that the members of the group possess in abundance. I request you to hereby provide a feature wherei ...
  Topic: Testing for Compressive Strength of Concrete Cover Blocks
Dr. N. Subramanian

Replies: 3
Views: 1358

PostForum: SEFI General Discussion   Posted: Wed Sep 15, 2021 9:46 pm   Subject: Re: Testing for Compressive Strength of Concrete Cover Blocks
Dear Er Ajay

I do not think there is a prescribed test method for concrete covers in any code, leave alone IS 456.

The cube testing procedure will not be applicable to concrete cover blocks.

...
  Topic: In working stress method we consider modular ratio m = 280/(3 σcbc). Is it correct?
Dr. N. Subramanian

Replies: 2
Views: 1005

PostForum: SEFI General Discussion   Posted: Tue Sep 07, 2021 10:27 pm   Subject: In working stress method we consider modular ratio m = 280/(3 σcbc). Is it correct?
In working stress method we consider modular ratio m = 280/(3 σcbc). Is it correct?

The short-term modulus of concrete does not take into account the effects of creep, shrinkage, and other lon ...
  Topic: Wind Load calculation as per IS 875 Part-3
Dr. N. Subramanian

Replies: 5
Views: 878

PostForum: Speak Out Box   Posted: Thu Sep 02, 2021 8:16 pm   Subject: Re: Wind Load calculation as per IS 875 Part-3
Dear SEFIans,
For a foot over bridge I want to calculate the wind force over the purlin, but as per table-6 (External pressure coefficients for pitched roofs of rectangular clad buildings) for h/w ra ...
 
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