ASHDOD HARBOR BRIDGES 3.1 & 3.2
Incremental Launching Bridges – Parametric Precision Meets Structural Performance
Designing bridges using the incremental launching method (ILM) demands an exceptional balance of geometric control, structural accuracy, and construction-stage simulation.
In our latest project, we implemented a fully integrated digital workflow combining parametric design, advanced structural analysis, and BIM detailing:
Parametric Modelling in Rhino + Grasshopper
A fully dynamic parametric model was developed in Grasshopper, allowing instant control over bridge geometry, including:
• Variable span lengths and pier positions
• Longitudinal slope and curvature
• Cross-section transitions
• Launching stage geometry (step-by-step updates)
This approach enabled rapid design iterations and seamless integration of geometry into both structural and BIM environments.
FEA and Prestressing Analysis with SOFiSTiK
Using SOFiSTiK, we conducted detailed finite element analysis, simulating each launching stage and calculating:
• Time-dependent effects (creep, shrinkage)
• Prestressing sequences using TEDDY
• Support reactions and internal forces during launching
• Final-stage stress envelopes
Prestressing tendons were optimized through scripting and linked directly to Grasshopper, creating an intelligent link between geometry and structural behaviour.
Full 3D BIM Model in Autodesk Revit
The final bridge model, including reinforcement and prestressing tendons, was built in Autodesk Revit:
• All geometry and rebar were generated based on the parametric definitions
• Tendons modelled accurately by stage and stress group
• Reinforcement detailing fully aligned with Eurocode and project standards
• Quantities and drawings extracted directly from the 3D model
This integrated workflow significantly enhanced design accuracy, shortened timelines, and enabled deep insight into construction behaviour—from concept to construction stage.