June 3, 2022

Integration between RISA-3D and SDS2

Version 20.0.2 allows users to integrate models between RISA-3D and SDS2, including model geometry, members sizes and end reactions.

Tags: RISA-3D, New, Steel, SDS2, Integration

June 13, 2011 | RISA-3D, New, Instability

How Do I Avoid Instability Warnings in a RISA-3D Model?

Have you ever received an instability warning when running a three dimensional RISA-3D model? This is because RISA-3D cannot build the stiffness matrix with the configuration you have modeled. In some cases, your model is truly unstable and in others it’s a matter of correctly modeling your structure for a 3D finite element analysis program. Below are a couple of tips to avoid instabilities in your RISA-3D models. Every joint in your model should have at least one fixed Member End Release framing into it. A good example of this is a truss. For more information on modeling boundary conditions for a 2D truss within RISA-3D see the Support article listed below. Link: Tips & Tricks: Truss Boundary Conditions When only one connecting member end releases is modeled as fixed (all others are modeled as pinned), no moment can be transferred at this joint. However, it allows the program to assign rotational stiffness to this joint which decreases your chances of getting an instability warning. Ensure that members framing into Boundary Conditions also follow Rule 1. This means that a column with a pinned Boundary Condition should have a fixed end release. Again, this ensures the program can assign rotational…

February 20, 2024 | RISA-3D, RISAFloor, New

Columns within Walls in RISAFloor v18.0 and RISA-3D v22.0

We're excited to unveil the latest advancements in structural design with the release of RISAFloor and RISA-3D v22.0! This update introduces a groundbreaking feature that allows you to seamlessly incorporate columns into walls, revolutionizing the way you model and analyze structural elements. With the ability to model column forces within walls and vertically release columns modeled in walls, you'll enjoy unparalleled flexibility and precision in your designs. Experience the seamless integration between RISAFloor and RISA-3D and unlock new possibilities in structural engineering. Click the RISA Customer Portal link and upgrade to v22.0 today and elevate your designs to the next level! RISA Customer Portal…

February 5, 2014 | RISA-3D, New, Geodesic Dome

How to model a Geodesic Dome in RISA-3D?

In modeling what would be a rather difficult geometric structure, by using the Templates database in RISA-3D, a geodesic dome can be constructed rather quickly and easily. Select the "Geodesic Dome" from the "Templates" drop-down found on the Home tab. The following dialog box will be displayed and you can enter in the necessary information for the geodesic dome generation: Platonic Solid Shape: Designates the overall shape, number and orientation of the geodesic dome Triangle Subdivision: Designates the number of triangle submesh per side of the triangular plate Polar Origin: Sets the origin (insertion) point of the dome Members: Allows for the creation of strut members using a material and pre-defined section set Plates: Allows for the generation of plates using a material and thickness Dome Height/Radius: Sets the geometry of the dome Once the properties of the dome have been defined, click OK to generate the dome…