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Re: Structural Irregularity and ASCE 16.2.2

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Dan,

I don't read it as a requirement to use non-linear analysis in chapter 16.  If you look at table 12.6-1, the equivalent static method is permitted.  Non-linear is also, but not requited.  It does beg the question of why the multi-modal method in 12.9 isn't also referenced in Table 12.3-1, but we all know the code can be inconsistant.

HTH
MJ




--- On Fri, 4/9/10, D E <struktur.dle(--nospam--at)gmail.com> wrote:

From: D E <struktur.dle(--nospam--at)gmail.com>
Subject: Structural Irregularity and ASCE 16.2.2
To: seaint(--nospam--at)seaint.org
Date: Friday, April 9, 2010, 10:39 AM

I have a structure with horizontal structural irregularity type 4. Per Table 12.3-1 it references compliance with Section 16.2.2. Section 16.2 is Nonlinear Response History Procedure. It seems excessive to require nonlinear response history vs a response spectrum analysis. What am I missing?
 
Also why is Table 12.3-1 referencing 16.2.2? Shouldn't the reference be to 16.2?
 
Dan