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Civil Engineering Association eBooks Journals, Papers and Presentations Review of the Soft First Story Irregularity Condition of Buildings for Seismic Design

Review of the Soft First Story Irregularity Condition of Buildings for Seismic Design
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10-04-2013, 12:07 PM
Review of the Soft First Story Irregularity Condition of Buildings for Seismic Design

Author: Arturo Tena-Colunga | Size: 1.6 MB | Format: PDF | Quality: Unspecified | Publisher: The Open Civil Engineering Journal, 2010, 4, 1-15 | Year: 2010 | pages: 15

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The present study evaluates how the soft first story irregularity condition should be defined: (a) as a significant
reduction of the lateral shear stiffness of all resisting frames within a given story, as established in the seismic provisions
of Mexican building codes or, (b) as a substantial reduction of the lateral shear stiffness of one or more resisting frames
within a given story, as proposed by the author. Both definitions are evaluated through nonlinear dynamic analyses of
buildings systems with a suspected soft first story condition in order to discern which option is closer to define the soft fist
story condition.


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