🏢 Earthquake Building Simulator 3D: Shake Table, Resonance and Story Drift

Shake a 3 to 10 storey building on a 3D shake table: an N-degree-of-freedom shear-frame model (modal analysis, Rayleigh damping, Newmark integration) with response spectrum, resonance, inter-storey drift and illustrative damage bands, soft-storey weakness, base isolation and a tuned mass damper under synthetic sweep, Kanai-Tajimi and near-fault pulse inputs. Differs from the existing earthquake-building and building-stress pages by solving the full multi-storey modal model with a live response spectrum, drift per storey, isolator and damper, and checking frequencies against the closed-form uniform-building eigenvalues.

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install