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Daily Digest Mon Mar 31 23:00:01 2003

 
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kalgal_mr
SEFI Member
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Joined: 26 Jan 2003
Posts: 9

PostPosted: Thu Apr 17, 2003 8:43 am    Post subject: Daily Digest Mon Mar 31 23:00:01 2003 Reply with quote

Hello Friends, I had posted a mail seeking clarifications/references for beams loaded axially in addition to transverse and lateral bending. Two friends replied that I could use the Curves for columns in SP:16. But I do not know if it is as straight forward as that. My doubts are as follows:1. In a column subjected to biaxial moments, the moments are at the ends only and the moment at the mid-height is almost zero. Whereas in a beam subjected to lateral and transverse loads in addition to axial loads, the moments at the midspan are significant. How do we design for these?
2. If column interaction curves are used, are the bars to be placed equal on top and bottom faces or equal on all faces? Even if we do, should we calculate separate steel for bending moments and add them in addition to the steel required for axial load?
3. What about shear reinforcement vs links of a column?
4. In columns, axial load is predominant and bending moments are generally not so(except at top stories). So how is the column curve to be used if it is a beam-column?
5. Is there a book/reference where this is dealt? I found something on the net but it was for steel sections.
Please do clarify
regards,

Dr. M. R. Kalgal







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rgassociates
SEFI Member
SEFI Member


Joined: 26 Jan 2003
Posts: 9

PostPosted: Thu Apr 17, 2003 2:10 pm    Post subject: Daily Digest Mon Mar 31 23:00:01 2003 Reply with quote

Dear Dr.
You can refer the text book  "biaxial bending of RC members by UH Varyani
published by South asia Publishers Pvt ltd ,Delhi in which the above design
with examples are given.
Regards,
Er.T.Rangarajan
----- Original Message -----
From: <kalgal_mr@yahoo.com>
To: <rgassociates@eth.net>
Sent: Thursday, April 17, 2003 2:13 PM
Subject: Daily Digest Mon Mar 31 23:00:01 2003


Quote:
Hello Friends, I had posted a mail seeking clarifications/references for
beams loaded axially in addition to transverse and lateral bending. Two
friends replied that I could use the Curves for columns in SP:16. But I do
not know if it is as straight forward as that. My doubts are as follows:1.
In a column subjected to biaxial moments, the moments are at the ends only
and the moment at the mid-height is almost zero. Whereas in a beam subjected
to lateral and transverse loads in addition to axial loads, the moments at
the midspan are significant. How do we design for these?
Quote:
2. If column interaction curves are used, are the bars to be placed equal
on top and bottom faces or equal on all faces? Even if we do, should we
calculate separate steel for bending moments and add them in addition to the
steel required for axial load?
Quote:
3. What about shear reinforcement vs links of a column?
4. In columns, axial load is predominant and bending moments are generally
not so(except at top stories). So how is the column curve to be used if it
is a beam-column?
Quote:
5. Is there a book/reference where this is dealt? I found something on the
net but it was for steel sections.
Quote:
Please do clarify
regards,

Dr. M. R. Kalgal







---------------------------------

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