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RE: Semi rigid connection design

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-----Original Message-----
From: Harold Sprague [mailto:spraguehope(--nospam--at)hotmail.com]
Sent: Friday, October 29, 2004 10:25 AM
To: seaint(--nospam--at)seaint.org
Subject: RE: Semi rigid connection design


>In steel structures, are you considering Semi rigid Connections ?
Yes
>If, yes than kindly share your experience regarding following points -
>
>1) Use of knee bracing at each and every beam column junction, so that
>moment at the junction can be taken care off by the knee bracing and the
>junction may be designed as a shear connection only.
No.  It can put bending in the columns, and it is difficult to have a
predictable yield point of the connection.
>
>2) Experiment data available .
None of which I am aware.
>3) Other points, if any.
Design for the yield of the connection.  Look at Blodgett's, "Design of
Welded Connections".

Regards,
Harold Sprague
Bhavin,

You can find seismic design and testing of knee bracing in one of my
publications. I designed and tested them as a viable retrofit for a type of
existing riveted connections which would qualify as semi-rigid connections
while exhibiting unsymmetrical and highly pinched hysteretic response.

"Cyclic Testing of Existing and Retrofitted Riveted Stiffened Seat Angle
Connections"
ASCE Journal of Structural Engineering, Vol. 122, No.7, July 1996, pp.
762-775

Regards,

Dr. Majid Sarraf, P.E., P.Eng.
Bridge Project Engineer/Senior Seismic Specialist
Sacramento, CA



>From: Bhavin Shah <vmscons(--nospam--at)eth.net>
>Reply-To: <seaint(--nospam--at)seaint.org>
>To: seaint(--nospam--at)seaint.org
>Subject: Semi rigid connection design
>Date: Mon, 25 Oct 2004 18:35:16 +0530
>
>Dear all,
>
>Sub : Semi rigid connection design
>
>In steel structures, are you considering Semi rigid Connections ?
>
>If, yes than kindly share your experience regarding following points -
>
>1) Use of knee bracing at each and every beam column junction, so that
>moment at the junction can be taken care off by the knee bracing and the
>junction may be designed as a shear connection only.
>
>2) Experiment data available .
>
>3) Other points, if any.
>
>
>Regards,
>
>Bhavin Shah, M.E. Structures
>Design Engineer
>VMS EDS, India.
>bhavin(--nospam--at)vmsconsultants.com

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