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2018 Archive

October 19, 2018

Eurocode lateral torsional buckling capacity is calculated per equations in Annex F in the ENV 1993-1-1:1992. This calculation uses variables C1, C2 and C3. Since there is no generic formula in the Eurocode to calculate the moment gradient factor, C1, RISA will use the widely accepted López, Yong and Serna method by default. The method […]

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Posted in Technical Solutions | Comments Off on Eurocode C1 Factor for Lateral Torsional Buckling

October 18, 2018

With the initial implementation of wood wall design in RISA-3D, the wall aspect ratio was calculated as the full height of the wall divided by the width of the region.This was intended to accommodate balloon framed multi-story walls that were drawn as one continuous wall stack.  With recent publications of the ANSI/AWC SDPWS, it has […]

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Posted in Technical Solutions, What's New | Comments Off on Update to Wood Wall Aspect Ratio Limits in RISA-3D

October 11, 2018

With the recent release of RISA-3D v17.0.0 the program now offer the user the option to use Chord Straps between floors of a wood shear wall building in lieu of using hold downs. Chord Straps are a great option for transferring tension load between floors of a multi-floor building and can be installed without accessing […]

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Posted in Technical Solutions, What's New | Comments Off on Hold Downs or Straps? You choose.

October 4, 2018

RISA-3D v17.0 now has the ability to model partial fixity member end releases. Partial fixity end releases can be utilized in RISA to model the behavior of a partially restrained or semi-rigid connection that cannot be idealized as fully fixed or pinned. Partially restrained connections are common in seismic moment frame systems and their semi-rigid […]

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Posted in Technical Solutions, What's New | Comments Off on Partial Fixity End Releases in RISA-3D

October 2, 2018

The new AWC NDS 2018 code has been implemented into RISA-3D v17.0 and RISAFloor v13.0. To select this code for your design, simply choose this code from the Codes tab within Global Model Settings.   After solution, the results are available in the Design Results spreadsheet. You can also verify the code selection used in […]

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Posted in Technical Solutions, What's New | Comments Off on Wood Design per AWC NDS 2018 Wood Code