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Re: ETABS/ Dual System

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Make the shearwalls inactive for the SMRF run and reduce the base shear down 75% from the first run.

-gm

On 9/8/06, Syed A Masroor < masroor(--nospam--at)eaworld.com> wrote:
Mondo
One way that works with all programs is to use different sets of materials for walls and columns and set the stiffness of walls equal to zero (by reducing E to 0.01 or something). Then all the loads are reduced to one fourth (includind self weight by reducing density).
 
If the system is working with these parameters, we have a dual system.
 
HTH

Masroor
----- Original Message -----
Sent: Saturday, September 09, 2006 10:12 AM
Subject: ETABS/ Dual System

All,
 
1. Is there any one here can explain to me how to check SMRF Elements in dual structural system that it can resist at least 25% of the design base shear (per UBC 1997) using ETABS?
 
2. How do you scale up dynamic base shear?... I just found out 2 methods in ETABS and both have different results. In your practice, how it is done?
 
Thanks,
 
-Mondo


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-gm