April 20, 2011
Refining Area Load Distribution in RISA-3D
After solving a model with Member Area Loads, RISA-3D will automatically create Transient Basic Load Cases that allow the user to verify load distribution.
April 18, 2011
Using Sum of Reactions in RISA-3D
RISA-3D will now check your model for errors by summing the reactions in your model and comparing them to the applied loads. This occurs for the global X, Y, and Z directions. If RISA identifies that the reactions do not equal the applied loads then the software will show a warning message to the...
April 13, 2011
How Do I Change the Member Type in RISA-3D?
In RISA-3D, there are many different applications that require you to define Member Type in your model including AISC 15th Edition steel design, Seismic Design, Concrete design, and models that will be transferred to Autodesk Revit.
April 6, 2011
What are the Unbalanced Forces on Beams?
V-Brace frames in RISA-3D seismic design have unbalanced forces shown on both the beams and braces. As brace frames displace under lateral loads, one brace will buckle and its force decreases while the other brace in tension will have an increase of force until it reaches yield.
March 31, 2011
How RISA-3D Handles Single Angles
The bending and axial code checks for single angles differ somewhat from other shape types, because single angles behave quite differently in bending and compression depending on how they are braced along their length.
March 30, 2011
How to Apply the Seismic Provisions in RISA-3D
The Seismic Provisions in RISA-3D will check various design and code check requirements according to the AISC design provisions (AISC 360-2005, AISC 341-2005, AISC 358-2009). Seismic Design Rules can be applied to any member in the model, just follow the steps listed below.
March 30, 2011
What Are the Seismic Design Rules in RISA-3D
The Seismic Design rules can be found in RISA-3D on the Data Entry toolbar or in the Spreadsheets menu. Below is a quick-reference description of the entries required. For further information refer to the Online Help File > Seismic Detailing.
March 16, 2011
Using Transient Loads to Verify Applied Area Loads in RISA-3D
When a model is solved that contains Member Area Loads, the program automatically attributes them to the applicable members within the defined area of the applied load. The load is attributed to the members as distributed loads that RISA-3D defines as Transient Loads.
March 9, 2011
How Do I Investigate My RISA-3D Model Using the Deflected Shape?
When your RISA-3D model is not behaving as you anticipated, one of the best tools you have is viewing the deflected shape. Displaying the deflection graphically will help you visualize how the model is behaving and will often times bring to light modeling errors.