November 19, 2014
What do the Unbraced Lengths represent?
Understanding unbraced lengths and how RISA software accounts for them is essential in the design of any project. In RISA there are three main types of unbraced lengths:
November 12, 2014
How do Unbraced Lengths affect Analysis?
The axial compression and flexure strength of beams and columns is dependent on the spacing of elements which provide bracing along the length of those members. You may specify unbraced lengths as a fixed distance or by using RISA’s Unbraced Length Commands. These unbraced lengths are used for...
October 29, 2014
Code Requirements for Panel Zone Shear Deformation
Code requirements for consideration of panel zone shear deformation can be confusing. This blog post discusses some of the basis for these code requirements and when one can consider them to be met and when one cannot.
October 21, 2014
How are Cantilevered Slabs designed?
Concrete buildings often have large cantilevers. In RISAFloor ES, the Support lines can be drawn to support points but also they can be drawn as cantilevers (shown below).
October 3, 2014
How to Model Support Lines with Parallel Walls
In RISAFloor ES, you draw a support line from support point to support point to define the Design Strips. The program will automatically create Design Strips based on the tributary width. When you have walls in the model, it is often a question of how you draw in the support lines.
September 11, 2014
How Do I Create Offset Connections in RISA-3D?
By default RISA-3D draws all members as line elements located at the centroid of the cross-section. However, connections between members are not always aligned with a member’s centroid. There may be horizontal or vertical offsets in the connection. To account for these you can add rigid links to...
August 27, 2014
What is a Rigid Link in RISA-3D?
A rigid link is a member element in RISA-3D that can be used for many advanced modeling procedures. It is so useful that it is included as one of the default member Section Sets, as you’ll see below.
July 1, 2014
Viewing the Deflected Shape in RISAFloor
The deflected shape is really helpful to understanding your model’s behavior.
June 19, 2014
How to Use Moving Loads
RISA-3D and RISA-2D will allow you to add a moving load pattern to your model and include it in your envelope solution.