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- To: seaint(--nospam--at)seaint.org
- Subject: Steel Plate Shear Walls
- From: Abolhassan Astaneh-Asl <astaneh(--nospam--at)ce.berkeley.edu>
- Date: Wed, 24 Oct 2007 22:01:28 -0700
Dear Mr. Merrick: I really enjoyed your refreshing and intuitive explanation of how steel shear walls behave as you have given below! I have been doing research on steel shear walls since 1998 and have never had felt the behavior the way you describe it , but, you are right on the point based on what I have observed on their behavior. As for the information, and as Mr. Madden has indicated below, the Structural Steel Educational Council (SSEC) , www.steeltips.org, has published the following Steel TIPS (Steel Technical Information and Product Services) report that I wrote: "Seismic Behavior and Design of Steel Shear Walls", by Abolhassan Astaneh-Asl, January 2001. A copy of this and other Steel TIP reports can be obtained from www.steeltips.org, free of charge for downloads from California and Nevada and for those outside Cal/Nev for a nominal charge ($20?). If you review it and have any questions, please let me know and I will be happy to help.Since 2001, we have completed two more new research/development projects on steel shear walls, the results of which are just being published. As soon as anything is published (next week a conference paper will be on the Internet) I will let you know.
Best wishes and hope this is somewhat helpful.Abolhassan Astaneh-Asl, Ph.D., P.E., Professor of Structural Engineering, Earthquake Engineering and Blast and Impact Protection of Buildings and Bridges.
Web Home Page: http://www.ce.berkeley.edu/~astaneh ============================ From: "Gerard Madden, SE" <gmse4603(--nospam--at)gmail.com> To: seaint(--nospam--at)seaint.org Subject: Re: Steel Plate Shear Walls There is a steel tips back in 2000 or so by Astaneh you can download. -gm On 10/23/07, David Merrick <MRKGP(--nospam--at)winfirst.com> wrote:
> > Could someone enlighten me about the AISC design guide 20, "Steel Plate > Shear Walls"? > > The article in "Structural Engineering" October 2007, p32 has an example > steel plate shear wall design. > > I did not see any mention additional welding near the steel plate corner > zones. I expected more welding for the increase stress when the plate > yields by buckling. I did not see any mention that the plate is designed > to not yield. There was no mentioning that the corner zone additional > welding was used for the full length of the plate to increase but > simplify the welder's task. > > As I recall (Design of Welded Structures, Omer W. Blodgett) for plate > ratios of less than 2:1, an equivalent tension strip is created as the > steel plate wrinkles. Similar to the wrinkles when pulling on opposite > corners of a bed sheet. This tension strip concentrates the plate shear > to the corners and increases the shear per length. For a near square > plate that increase is about 3 times the stress (shear/length) of a > similar but thicker and not buckling plate. > > This tension strip is small and more like diagonal tension straps, > usually leading to the conclusion that the system must assume a > non-ductile shear wall with increased base shears or that diagonal > braces are more effective. > > Could someone enlighten me about the AISC design guide 20, "Steel Plate > Shear Walls"? > > Long time ago, in a nuclear power generator building, there were steel > plate floor diaphragms, with evenly spaced lengths of edge welding. It > was concluded that the existing plates needed full penetration welds at > the plate corner zones. Shit hit the fan, but then the work was done. > > David Merrick > >
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