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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 4th of July is a time for celebration, fireworks, and, of course, a bit of fun. For those with a knack for engineering or simply looking to engage in some creative activities, why not take on some patriotic engineering challenges? These activities are perfect for kids and adults alike, providing an entertaining way to celebrate Independence Day while sharpening your problem-solving skills. Here are three exciting challenges to get you started: 1. Popsicle Stick Bridge Materials Needed: Popsicle sticks Glue (wood glue or a hot glue gun) Small weights (coins, toy cars, etc.) Challenge: Design and build a small bridge using only popsicle sticks and glue. The goal is to create a bridge that can support as much weight as possible. This activity not only tests your creativity but also your understanding of structural integrity and load distribution. Instructions: Plan Your Design: Before you start gluing, sketch out a design for your bridge. Consider different types of bridges, such as beam, truss, or arch bridges. Build the Foundation: Begin by constructing the main supports for your bridge. Glue several popsicle sticks together side by side for a strong base. Assemble the Bridge: Connect the supports with horizontal and diagonal…
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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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