Way to go man!
> From: ASQUILALA(--nospam--at)aol.com[SMTP:ASQUILALA(--nospam--at)aol.com]
> Reply To: seaint(--nospam--at)seaint.org
> Sent: Tuesday, June 22, 1999 2:21 PM
> To: seaint(--nospam--at)seaint.org
> Subject: Re: Seismic - Isolating CMU infill wall
> To Rodrigo Lema:
> Answer the following questions:
> 1. If you provide a gap which is a little bit more than the
> anticipated deflection of the frame do you think the frame will still lean
> the wall?
> 2. Assuming that the frame will lean on the wall but the wall
> was not designed to resist the shear or lateral load, what will happen to
> My guess is, it will fail ( or crack).
> 3. If the wall will fail, will the frame be able to resist the
> lateral load that has designed for in the first place?
> 4. Since you can't rely on the strength of the infilled wall
> can you use it for design?
> Manufacturers of CMUs have controlled environment to make sure that
> their products are manufactured as per the specified strength. They do
> their products using standard practice of testing. This way they are sure
> that the strength of CMU in each specified design mix is attainable. CHBs
> are not. They are mixed at the site with some kind of proportion and
> the benefit of testing. For all I know, CHB's strength is only about 200
> (I'm not sure on this). If your clay brick is the same as CHB in
> then it is hard to use the infilled walls to resist lateral loads without
> support of standard testing. I know where you were coming from when
> how these infilled walls can resist the lateral loads. But until somebody
> come up with a more established and controlled environment in producing
> CHBs or brick walls for that matter then using them for resisting the
> loads is not advisable. Use CMUs or Jack-Built instead. (Jack Built is a
> brand name of CMU).
> Alfonso S. Quilala Jr., P.E.