2019 Archive

August 21, 2019

The new release of RISA-3D is right around the corner! Check out our teaser videos to enjoy a sneak peek at some of the most exciting new features!

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Posted in Education, What's New | Comments Off on RISA-3D v18 Sneak Peek Videos

July 12, 2019

Tension or Compression (T/C) Only members are commonly used in steel buildings when modeling braced frames that resist lateral load.  Note: Tension or Compression Only Members can also be used in modeling cables or construction gaps. Detailed discussions on these applications can be found here: Cables | Gap  As a result, tension only members will […]

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Posted in What's New | Comments Off on Implementing Realistic Behavior for T/C Members in RISA-3D

June 20, 2019

When modeling building structures using steel or composite steel floors, engineers typically utilize rigid diaphragms to distribute lateral loads (wind and seismic) to lateral load resisting elements such as shear walls, moment frames and braced frames.  Rigid diaphragms represent a plane of very high rigidity and distribute load to elements which connect to them solely […]

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Posted in Education | Comments Off on Understanding Wall Panel Forces with Rigid Diaphragms

May 16, 2019

When using semi-rigid diaphragms in a RISAFloor/RISA-3D model, it is possible to see negative moments at the ends of pinned beams as a result of the link between the semi-rigid diaphragm and the beam-column connection. In RISAFloor, semi-rigid diaphragms utilize internal rigid links to create a 12in by 12in “rigid zone” around the column location […]

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Posted in Education | Comments Off on Pinned Beams in Semi-Rigid Diaphragms

March 28, 2019

RISA-3D has two ways of automatically generating seismic-related Basic Load Categories (BLCs) which can be later referenced in the Load Combinations (LCs):   Creating seismic BLCs (ELX, ELZ, etc) from the Seismic Load Generator Creating seismic BLCs (SX, SZ, etc) from Response Spectra Analysis In addition to the automatic generated seismic loads, users can always […]

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Posted in Education, Technical Solutions | Comments Off on General Steps of Assigning Seismic Loads in RISA-3D