September 27, 2018
Using Analysis Offsets in RISA-3D
Have you ever wondered what the Analysis Offset feature does? Let’s take a look at how this feature can be used to model members at top of steel.
The winter months bring a unique set of challenges to structural engineering: projects slow down, site conditions become less predictable, and downtime can be harder to avoid. However, this season also brings opportunities to work smarter, streamline workflows, and plan ahead for a productive year. Here’s how you can help keep projects on track even in the frostiest months. 1. Winter Prep: Tackle Delayed Analysis Cold weather is often the perfect time to tackle those time-intensive analyses that may have been put on the back burner. With RISA-3D’s robust modeling environment, winter downtime becomes the ideal chance to dive into in-depth analysis and design. RISA-3D lets you quickly model complex geometries and visualize load paths in ways that manual calculations simply can’t replicate. And for foundation design, RISAFoundation can handle everything from frost heave assessments to wind uplift forces, enabling you to get the clearest picture of how your structures will withstand winter’s impact. Take advantage of the winter slowdown to refine and validate your foundation designs, ensuring every project element is prepared to endure the season. 2. Expand Your Toolset with RISA’s Comprehensive Training Programs Winter is an ideal time for skill building. RISA offers a range of training…
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Have you ever wondered what the Analysis Offset feature does? Let’s take a look at how this feature can be used to model members at top of steel.
For concrete column members, the load combination producing the maximum shear code check is reported in the Detail Report and corresponding Results spreadsheet. Since concrete is evaluated based on a batch solution, this can be useful when shear governs the design.
There are many different types deflection values calculated by RISA-3D. Let’s take a deeper dive into each.
RISA-3D v16.0.4 introduces an enhancement that will allow for more control over the beam deflection ratio through Deflection Ratio Options. As part of the member properties, you can now designate the ends of single and multi-span beams as a cantilever or supported. This will determine whether the...
RISA-3D v15 now includes automatic drift definitions for diaphragms as well as simplified story drift application. The reported drift results have been updated as well, and are now much more relevant for today’s codes. Drift results will report results in red text when seismic drift exceeds the...
RISAFloor has the ability to assign camber design rules which allow the user more control over which members are cambered. A camber is the slight upward curvature of a steel beam which is used to compensate for deflection. A user can assign a camber directly to a member or set up design rules to...
RISA-3D v14 introduced envelope detail reports for all material members. This means that you can see the enveloped solution (force diagrams and governing code check values) in the detail report for each member when you solve either an Envelope or Batch + Envelope solution type.
After solving a model, you will see in the Member Deflections spreadsheet the following deflection ratios:
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.
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