Progressive Collapse Analysis
Extreme Loading® for Structures (ELS) software allows structural engineers to accurately model, 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 can be used to satisfy requirements for UFC 4-023-03 Design of Buildings to Resist Progressive Collapse. 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 Accuracy in 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 ELS solver automatically separates the section that fails allowing it to behave naturally within the collapse scenario.
- Reinforcement details, slabs, and masonry walls, commonly neglected in Progressive Collapse Analysis can be easily included in the model, providing a more accurate results and savings in hardening costs.
Quick & Easy Modeling:
- Automatic mesh adjustments.
- Automatic spring generation.
- No transition elements required.
- 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:
- Reducing Cost on Progressive Collapse
- Watch: Model Progressive Collapse in 10 Minutes or Less
- Engineering Structures Journal Article: Toward an Economic Design of Reinforced Concrete Structures Against Progressive Collapse
- Progressive Collapse Analysis Services
- Applied Element Method (AEM) – Progressive Collapse
- DHS – Interagency Security Committee
- GSA Progressive Collapse Guidelines
- UFC 4-023-03 Design of Buildings to Resist Progressive Collapse
- UFC 4-010-01 DOD Minimum Antiterrorism Standards for Buildings
- Physical Security Design Manual for VA Facilities: Life-Safety Protected
ASI's paper on the progressive collapse of the Polcevera Viaduct Bridge in Genoa, Italy will be available free for the next 50 days from Engineering Structures. ASI Engineers modeled up the bridge and simulated the collapse using its Extreme Loading for Structures...
Structures Congress 2018: Nonlinear Dynamic Impact Analysis of Collapsed Debris Using Applied Element Method
Ahmed Khalil, Ph.D., P.E., M. ASCE will be presenting a paper entitled, "Nonlinear Dynamic Impact Analysis of Collapsed Debris Using Applied Element Method" at Structures Congress 2018 on Friday, April 20 from 9:30 AM - 10:30 AM in room 202B Abstract:...
The 3rd Newsletter for INACHUS has just been released. It details ASI's role in performing onsite structural collapse analysis of a reinforced concrete building for use by Urban Search & Rescue (USAR) during emergency response to collapsed or damaged...
Deliverable 3.2 Summary Report Report on Model Enhancement and Validation Cases was just released. The report identifies the promising of the capabilities of Extreme Loading for Structures (ELS) to be used in disaster response situations to accurately...
Visit ASI Engineers as they present on the proposal of a new methodology to design against disproportionate collapse for critical buildings that must be operational after a terrorist attack. The disproportionate collapse analysis uses the alternate path method where...
Visit ASI Engineers as they present on Alternative Load Path Analysis (ALPA), which is becoming the most common technique for performance based design of structures to resist disproportionate collapse. This has coincided with an increased ability of high fidelity...
Structures Congress 2017: Ship Impact & Nonlinear Dynamic Collapse Analysis of a Single Well Observation Platform
Visit ASI Engineers as they present on the three-dimensional nonlinear dynamic analysis they performed on a single well observation platform. The structure consists of a single level service deck supported by three driven piles and a bracing frame. Extreme Loading®...