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• Non-linear plastic collapse and large deflection analysis.
• Includes strain hardening and joint flexibility.
• Ultimate strength/risk evaluation.

The following plots show typical results from EDI's Collapse programs.
Please click on any picture to display a larger version.

Jacket Pushover Analysis	Pushover Analysis - Plot Indicating X-Brace and Leg Failure	Pushover Analysis - Plot Showing Elasto-Plastic Leg Buckling and Pile Plasticity
Pushover Analysis - Plot Showing Foundation Axial Capacity Utilization at Failure Load	Blast Wall Analysis - Using Large Deflection Elasto-Plastic Plate Elements	Boat Impact Analysis of Jacket Leg Using Elasto-Plastic Plate Elements

Local member buckling and joint failure events are now fully implemented within Collapse. Overall stability of members in compression is also monitored. Results can now be requested for specific joints or members. The interactive viewer Collapse View has been enhanced to display piles when viewing Collapse results. Pile plasticity or foundation axial capacity utilization may be displayed using color contours. Joint failure events are now included in the local history report. DNV ship impact curves have also been added to Collapse View to determine energy absorbed by the ship during an impact with an offshore installation. The user may now specify the total number of load steps to be read into Collapse View. Plate plasticity color contours have now also been fully implemented.

Future enhancements to Collapse will include a restart feature which will allow users to restart an old analysis at any load step. This will allow the user to adjust the load incrementation characteristics to match the nonlinear behaviour of the structure. The user will also be allowed to fracture a given member at a specific load step or load factor or a user defined critical strain. Future enhancements to Collapse View will allow the user to generate a SACS model of the structure at any given load step in its deformed configuration.

Click here for more information on non-linear capabilities.