Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

Re: Masonry Shear walls

[Subject Prev][Subject Next][Thread Prev][Thread Next]
Allen,

There was no intended criticism of the RAM software per se, and I am sorry
if I came across that way.  You just happened to be the software application
named in the initial posting.  The comments I made are equally applicable to
SAP / ETABS, Staad, Visual Analysis, or any other software analysis package.

Your last statement "Just make sure that the computer model represents the
physical reality" is exactly the point I was trying to make.  I think it
would be prudent to add to this " and the details on the drawings reflect
the model used in analysis".

Paul Feather PE, SE
pfeather(--nospam--at)SE-Solutions.net
www.SE-Solutions.net
----- Original Message -----
From: "Allen Adams" <aadams(--nospam--at)ramint.com>
To: <seaint(--nospam--at)seaint.org>
Sent: Tuesday, October 22, 2002 9:50 AM
Subject: Re: Masonry Shear walls


> Just a note of clarification: RAM Frame is certainly capable of performing
> a lateral analysis, as well as the gravity analysis, of a structure of any
> material, including CMU. And you can be confident in the validity of the
> analysis. If you model in your steel frames and your CMU walls, the
program
> will distribute the lateral forces to the various elements according to
> their relative stiffnesses - based on the geometry and material properties
> - and location and orientation in the diaphragm. Of course proper modeling
> is important, and of course there is no substitute for a proper
> understanding of structural behavior (RAM - and any other computer program
> - is just a tool, not a substitute for an engineer), but this type of
mixed
> system can be easily modeled and does not generally present any particular
> difficulties for the program. Just make sure that the computer model
> represents the physical reality (isolated vs connected to the diaphragm,
> load bearing vs nonload bearing, etc.).
> Allen Adams, S.E.
> RAM International
>
>
> ----- Original Message -----
> From: "Paul Feather" <pfeather(--nospam--at)SE-Solutions.net>
> To: <seaint(--nospam--at)seaint.org>
> Subject: Re: Masonry Shear walls
>
> Terry,
>
> .
> .
> .
>
> RAM is an analysis program, therefore you are most likely designing a =
> steel frame structure.  If you provide CMU walls the RAM analysis is =
> worthless without accounting for the interaction of the shearwall system =
> and the frame system based on geometry and relative stiffness of the =
> systems.  With no intention of sounding sharp, RAM is only a computer =
> program and is incapable of performing a valid lateral analysis.  The =
> validity of the analysis will depend on the correct modeling of the =
> structure for the actual anticipated behavior, and the addition of rigid =
> elements cannot be ignored or neglected, or arbitrarily assigned some =
> value of lateral resistance.
>
> .
> .
> .
>
> Paul Feather PE, SE
> pfeather(--nospam--at)SE-Solutions.net
> www.SE-Solutions.net
>
>   ----- Original Message -----=20
>   From: Terry Triest=20
>   To: Seaint=20
>   Sent: Monday, October 21, 2002 9:39 AM
>   Subject: Masonry Shear walls
>
>
>   This question pertains to CMU walls used for back-up to masonry brick. =
>    How much capacity does CMU back-up distribute to the structural =
> frame?  =20
>
>   Does anyone have information on the testing of this assembly?
>
>   I use RAM and was wondering if (how much) I can rely on the CMU for =
> lateral resistance.
>
>   Terry Triest, EIT
>   Structural Engineer
>   P: 814-940-4041
>   F: 814-949-2644=20
>
>
> 
>
> ******* ****** ******* ******** ******* ******* ******* ***
> *   Read list FAQ at: http://www.seaint.org/list_FAQ.asp
> *
> *   This email was sent to you via Structural Engineers
> *   Association of Southern California (SEAOSC) server. To
> *   subscribe (no fee) or UnSubscribe, please go to:
> *
> *   http://www.seaint.org/sealist1.asp
> *
> *   Questions to seaint-ad(--nospam--at)seaint.org. Remember, any email you
> *   send to the list is public domain and may be re-posted
> *   without your permission. Make sure you visit our web
> *   site at: http://www.seaint.org
> ******* ****** ****** ****** ******* ****** ****** ********
>


******* ****** ******* ******** ******* ******* ******* ***
*   Read list FAQ at: http://www.seaint.org/list_FAQ.asp
* 
*   This email was sent to you via Structural Engineers 
*   Association of Southern California (SEAOSC) server. To 
*   subscribe (no fee) or UnSubscribe, please go to:
*
*   http://www.seaint.org/sealist1.asp
*
*   Questions to seaint-ad(--nospam--at)seaint.org. Remember, any email you 
*   send to the list is public domain and may be re-posted 
*   without your permission. Make sure you visit our web 
*   site at: http://www.seaint.org 
******* ****** ****** ****** ******* ****** ****** ********