Steel Structures: Analysis/Design Course using MIDAS GEN - SIMPLE STEEL TRUSS SHED (Part 1)

Summary

This video introduces a new series on modeling and designing steel structures using Midas Gen. The tutorial covers the step-by-step process of modeling a steel truss shed resting on steel frames, including defining materials, sections, and applying beam releases. The analysis phase examines load applications, including self-weight, roof load, and live load, followed by calculating member forces and deformation. The video concludes by showcasing the analysis results, including force distribution and deformation patterns. In the next video, the focus will shift to designing the structure based on AISC specifications.

Takeaways

• 😀 Introduction to a new video series focused on modeling and analyzing steel structures using Midas Gen software.
• 😀 The tutorial demonstrates how to model a simple steel truss shed on steel frames using Midas Gen.
• 😀 The modeling process includes using the 'structure wizard' to create a symmetric truss with five panels and defined dimensions.
• 😀 Top and bottom chords are modeled as beam elements, while vertical and diagonal braces are modeled as truss elements.
• 😀 Column elements are added to the model, and beam releases are applied to prevent moment transfer between trusses and columns.
• 😀 ASTM A36 steel is chosen as the material for all structural members, and section properties are assigned to different parts of the truss structure.
• 😀 The model is translated in the positive Y direction to create multiple identical trusses, replicating the geometry and properties.
• 😀 Girder and purlin elements are modeled and connected to ensure proper structural interaction, including intersections and support conditions.
• 😀 Loads are applied to the structure, including self-weight, roof loads (from a 20-gauge corrugated sheet), and live loads (2 kPa), using the floor load command.
• 😀 The analysis results show bending moments, truss forces (tension and compression), and deformations, with animated displacement visualizations to understand structural behavior.
• 😀 In the next video, the focus will shift to designing the structure according to AISC design specifications.

Q & A

What is the main focus of the video series?

The main focus of the video series is modeling, analysis, and design of steel structures using software like Midas Gen. The first video demonstrates modeling a simple steel truss shed resting on steel frames.

Which software is used for modeling and analysis in the video?

Midas Gen is the software used for modeling and analyzing steel structures in the video series.

What structure is being modeled in the first video?

The first video demonstrates modeling a steel truss shed resting on steel frames.

How many panels does the truss have in the modeled structure?

The truss in the modeled structure has five panels.

What is the height and length of the truss modeled in the video?

The truss has a height (H2) of 1.2 meters and a length (L) of 5 meters.

What material is used for the structural elements in the model?

ASTM A36 steel is used as the material for the structural elements in the model.

Why are beam releases used in the modeling process?

Beam releases are used to prevent bending moments from being transferred between the top and bottom chords of the truss and the columns, ensuring that the truss elements behave as intended.

What load types are applied to the structure in the analysis?

The loads applied include dead load (self-weight), roof load (due to corrugated sheet roofing), and live load.

What kind of error is encountered during the analysis, and how is it handled?

A singularity error is encountered due to the 3D nature of the structure and the truss elements. This error can be ignored to proceed with the analysis.

What are the two types of deformations analyzed in the video?

The two types of deformations analyzed are nodal deformation (displacement at nodes) and real deformation (displacement along the entire element).