
September 7, 2021
Defining Connections: Beam to Girder Connections
Member Configuration The connection rule must be applied at the end of the beam (not the continuous girder).
When designing shear walls in RISA-3D, it’s common to add surface loads—whether to simulate lateral wind or seismic pressures, or even out-of-plane loads. But what happens when those loads intersect with openings in your wall panels? Let’s walk through exactly how RISA-3D handles this scenario behind the scenes, including how the program preserves total force and moment equilibrium—even when wall geometry gets complex. ⚙️ How It Works: Surface Load Redistribution at Openings When a surface load is applied to a wall panel that contains openings, RISA-3D uses a special algorithm to redistribute the portion of the load that would otherwise fall inside the opening. Rather than ignore that load entirely, the program converts the "lost" surface area into equivalent nodal forces along the edges of the opening. These loads are known as transient nodal loads. Here’s the step-by-step breakdown: Determine Centroid of the Loaded Region RISA calculates the centroid of the area made up of both the surface load region and the opening. Split the Load Across the Opening The surface load over the opening is divided into two halves, based on the centroid location. Distribute Equivalent Forces Along Opening Edges These two portions of the load are then “smeared”…
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Member Configuration The connection rule must be applied at the end of the beam (not the continuous girder).
The latest release of the RISA-Revit Link now includes support for Autodesk Revit 2022 as well as the ability in import/export cold-formed steel wall panels. To learn more, watch the video below or check out the release notes.
In this video, learn about the various unbraced length parameters that exist in RISA-3D and how the different values can impact the design of beam and column members in RISA-3D. Click the button below, for more detailed information about unbraced length in RISA-3D.
RISA software is staying current with all the Windows updates in order to bring you the best quality that Windows recommends. Unfortunately, that means it will require a little extra time during installation and your computer could require a reboot more than once. The current versions of RISA...
The ability to design buckling restrained braced frames has been added to RISA-3D when you integrate your model from RISAFloor. In collaboration with CoreBrace, this new feature came as part of the release of RISA-3D v19.0.0 and RISAFloor v15.0.0.
The ability to design buckling restrained braced frames has been added to RISA-3D when you integrate your model from RISAFloor. In collaboration with CoreBrace, this new feature came as part of the release of RISA-3D v19.0.0 and RISAFloor v15.0.0.
With the release of RISA-3D v19.0.2, you can now design special concentrically braced frames (SCBF) as well as buckling restrained braced frames (BRBF) according to the capacity-limited design. The objective of capacity-limited design is to ensure columns and beams in braced frames are designed to...
The latest releases of RISAFloor (Version 15.0.1) and RISA-3D (Version 19.0.1) include consideration for accidental torsion and eccentric loading for semi-rigid diaphragms according to requirements outlined in ASCE 7, Section 12.8.4.2.
The release of RISA-3D Version 19 includes the introduction of Yield-Link® Moment Connections, developed in conjunction with Simpson Strong-Tie®.
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