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Moment resisting frames & Capacity design procedure

 
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adutt
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Joined: 26 Jan 2003
Posts: 43

PostPosted: Mon Dec 27, 2004 6:14 pm    Post subject: Moment resisting frames & Capacity design procedure Reply with quote

Subject- Moment resisting  frames &
Capacity design procedure

Dear Ali Shah,

This is reply to your two questions

1.     Moment resisting  frames have joints that can transfer moments
that is they are joined in such a way that these joints are restrained
against rotation by the interconnecting members.Hence there will be
transfer of moments from beams to columns and visa versa. These frames
can also resist lateral forces like wind & earthquake.
2.     The Capacity design procedure is quite developed in New Zealand
& mentioned in their codes & based on work of Paulay.The purpose of
capacity design is to limit inelastic action,as well as formation of
plastic hingesto selected elements of a moment resistant frame. Ideal
location of plastic hinges will be beams . Elements like columns ,are
intended to remain essentially elastic under the design earthquake by
designing them with sufficient overstrength relative to yielding
members.Hence in a way it is strong column & weak beam design
philosophy. For a brief & simple understanding of the above principle
please refer Proffessor C.V.R Murty 's (IIT Kanpur) IITK-BMPTPC-
Earthquake Tip 9 ,See

www.nicee.org <http://www.nicee.org/>  



I hope the two above will help.  



With Regards

Amit Dutt -Structural Engineer

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