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Progressive Collapse Analysis

Extreme Loading® for Structures (ELS) software allows structural engineers to accurately analyze and visualize progressive (disproportionate) collapse resulting from extreme loading conditions including: earthquake loads, severe wind loads, blast loads, dynamic loads and impact loads. Engineers can also determine a structures vulnerability to progressive collapse by creating multiple event scenarios which will simulate the failure of different components so as to determine whether the resulting collapse will be partial or complete.

ELS is the only software available that can be used by structural engineers to fully analyze progressive collapse scenarios easily following progressive collapse procedures.  This is because ELS is built around the Applied Element Method (AEM) of analysis, the only method that automatically calculates crack initiation, propagation and separation of elements.


Advantages of using ELS for Progressive Collapse Analysis:

  • Provides enhanced accurate analysis because:
    • Plastic hinges are not assumed; rather, they are automatically calculated and generated without any user intervention.
    • Collapse areas are not assumed; rather, when a plastic hinge fails the solver automatically separates the section that fails allowing it to behave naturally within the collapse scenario.
  • Quick & Easy Modeling:
    • Automatic mesh adjustments.
    • Automatic spring generation.
    • Data exchange available with several FEM and BIM software applications.

Progressive Collapse Features:

  • Structural components can be removed either simultaneously or at custom intervals.
  • Analysis is performed automatically within the solver. Gravity analysis is provided by default with non-linear dynamic analysis to simulate the accumulated effects of progressive collapse without any user intervention.
  • Through the true modeling of structural components, "catenary action" and other structural responses are taken into account.
  • Users can truly understand the cause and how the structure collapses because ELS allows them to witness the entire duration of the collapse process, verify which part(s) of the structure will collapse, and predict the effects of falling debris on adjacent structures.

  Related Links for Progressive Collapse Analysis:
Progressive Collapse Analysis
Progressive Collapse Analysis using Extreme Loading for Structures Software

Extreme Loading® for Structures Version 3.1 Features

White Paper: UFC Progressive Collapse Material Cost Savings

Advantages of ELS for GSA Progressive Collapse Guidelines

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