Design a tall building's structure and prove it against wind and earthquakes. Everything on screen is computed by a real 3D beam-element finite element solver running in your browser.
This simulation needs WebGL to draw the 3D tower. Please try a recent browser with hardware acceleration enabled. The structural analysis results are still shown in the panel.
Mass is tuned to the first translational modes (Den Hartog). Mistune it and watch the benefit vanish.
Utilisation = demand / capacity, combining axial force, bending and shear (envelope of gravity, wind and earthquake combinations).
Real-time nonlinear dynamic analysis: Newmark time integration of the full 3D frame, elastic-perfectly-plastic members with energy-based damage, member fracture and re-factorisation of the stiffness matrix. Plastic hinges glow orange to red; broken members vanish.
Evaluating the earthquake challenge runs the full time history at high speed and reports the outcome.