November 13, 2019

Designing a Simple Steel Beam in RISA-3D

Tags: RISA-3D, v18, New, Steel, Beam

October 22, 2024 | Featured, RISA-3D

How to View Step Results for Moving Loads in RISA-3D?

In RISA-3D, moving load results are generated by simulating a load that moves across a structure in defined increments. These loads are often used for designing bridges, cranes, or other structures where dynamic loads shift across the structure over time. Moving loads are complex because they involve numerous load steps, each with its own set of internal forces and deflections. Due to the large number of iterations, RISA-3D envelopes moving load results, meaning only the maximum and minimum values for each member or section are shown. This helps simplify the output and avoids an overwhelming volume of data. However, to view individual load steps for detailed analysis, a different approach must be used. Viewing and Creating Moving Load Steps in Load Combinations To review moving load results such as deflections and force diagrams step by step in RISA-3D, you need to generate load combinations that reflect individual moving load steps. Here’s how you can view and create these steps: Identify the Desired Moving Load Step: First, you must determine which moving load step you want to investigate in detail. This can be done by reviewing the envelope results and noting the governing load combination and step number in the "LC"…

February 18, 2014 | RISA-3D, Loads, RISA-2D, New

How to Add a New Pattern to the Moving Load Database

RISA-3D and RISA-2D come with a default list of existing moving load patterns. These are listed in the Moving Loads Library which can be viewed by clicking on the Moving Load Patterns button in the Advanced tab. The default options listed are common AASHTO loads, but you can also add a new pattern, edit a pattern, or delete a pattern. Any changes you make will be saved to the database on your local computer and so the same library of moving loads will be available for use in other models. You may combine lateral and vertical loads in the pattern, and you can define them in a number of ways. The loading direction options are as follows: To add a new pattern: Click on the Add Pattern button to add a new moving load pattern. Enter a Pattern Label and your loading: Click OK. The Distance value denotes the distance between the previous load and the next load. If you have two loads in different Directions but at the same location, you can enter a distance of 0, as is shown in the example above. This example will result in loading like this:…

January 9, 2024 | RISA-3D, Telecom, Broadband

How To: Define an Eccentric Antenna Load on a Pole in RISA-3D?

Using RISA-3D's various modeling and loading tools, makes modeling telecom structures easy and efficient. RISA-3D allows engineers to quickly explore numerous design variations before physical implementation. When modeling the equipment dead load as a point load, have the point load applied at the center of mass of the equipment. However when the center of mass is not aligned with the pipe's, you can use one of two methods below: Use rigid links to transfer the eccentric load Apply a point moment load at the equipment support point due to eccentricity METHOD 1: Using Rigid Links If the pole centerline is different from the mount centerline and you want to capture this in the model, you will want to use rigid links. Follow the steps below: Model in your structural pipe member Then draw small rigid links that extend perpendicular from the pipe Then place your loading at these rigid link locations so that the offset is captured. See an example of this below. By default the program already has a rigid member set up for you within the section sets > general material. To use this member you can use the following settings when drawing your rigid links. Link: Rigid…