Building Response Lab
A simplified first-mode dynamic model showing how a building's height, stiffness, mass, damping and ground-storey condition shape its response to earthquake shaking, with illustrative reference thresholds for interstorey drift.
Ground motion being applied
Drag anywhere on the chart to scrub to that moment — the building's full response is recalculated to match.
● Simulation running
Two columns, time_s,accel_g, one header row optional. Works with exports from SeismoStruct/SeismoSignal etc. once converted to time+acceleration pairs.
Live building response
Deformation visually amplified for clarity · storey height and count to scale · right panel shows real elevation, floor number, live drift and displacement together.
● Simulation running
Response history
Ground acceleration (g) and roof displacement (mm), latest window — each line scaled to its own peak, shown in the corners.
Drift by storey
Peak drift ratio per floor (%), colour-coded by illustrative damage state, relative to the selected reference threshold.
Engineering note — Simplified first-mode model only; period is an empirical estimate and drift thresholds are illustrative, not code-based. Displacement isn't artificially capped, so extreme resonance cases can look unrealistic. For education only — not for structural design or code compliance.
Not for design or code compliance