September 16, 2015
How RISA-3D Calculates Member Deflection Ratios
After solving a model, you will see in the Member Deflections spreadsheet the following deflection ratios:
September 9, 2015
Why don’t the Beams in my Frame have axial force?
The beams in a lateral force resisting system, such as a braced frame or moment frame, typically carry a significant axial force. In the example below (with no diaphragms) the beam (M4) carries a significant axial tension.
August 25, 2015
What does the Include Structure Weight Checkbox Do for Seismic Loads?
In the Seismic Loads dialog there is a checkbox for “Include structure weight in base shear”.
August 20, 2015
Residual Rigid Response (Dynamics)
When running a Response Spectrum analysis for seismic design, the response for high frequency modes can be included without solving for their individual mode shapes. This is often done to save analysis time and memory. This topic discusses some of the technical background and gives references for...
August 11, 2015
What Loads Transfer from RISAFloor to RISA-3D?
RIAFloor designs the gravity system and then integrates with RISA-3D to design the lateral system. Only the lateral members are taken from RISAFloor over to RISA-3D. The loading is automated in this integration so one of the most common questions is: what loads are transferred when switching from...
August 7, 2015
How to Create a Custom Shape in RISA-3D
There are multiple options in RISA-3D and RISAFloor to create a custom shape not available in the program databases. The first, is to utilize RISASection in order to create cross-sections, calculate section properties and import the shape directly into RISA-3D. For more information on integrating...
July 14, 2015
How to Import a Seismic Moment Connection into RISAConnection
Design for seismic connection detailing is now available in RISAConnection and you can use the connection rules within RISAFloor and RISA-3D to export a RISAConnection model. The integration will import the connection forces (and seismic detailing results) into RISAConnection for seismic moment...
June 15, 2015
Improved Result Access in RISA
This video tutorial will demonstrate how to find quickly review the results in RISA-3D in order to optimize the design.
June 15, 2015
Capture Animation in RISA
This video will demonstrate how to capture the animation from RISA-3D into a movie format. The deflected shape, moving loads and mode shapes can all be shown as a animation. This feature will now allow you to export this animation to a AVI format.