A shaking-table specimen exposes sand grains, water, a pore-pressure sensor and a surface structure. Cyclic excitation generates an illustrative excess-pressure ratio; after shaking stops, drainage reduces it and effective stress recovers.
• 3D scene parts: Shaking table and actuator; saturated sand skeleton; pore-water stress indicator; surface structure; pore-pressure and effective-stress sensor. • Controls: Peak acceleration / g (0.05–0.5); Illustrative cyclic resistance proxy (0.08–0.3); Representative layer depth (2–10 m); Saturated unit weight (18–21 kN/m³); Shaking frequency (0.5–3 Hz); Shaking duration (5–25 s); Pressure dissipation time (10–120 s). • Live readouts: Simplified cyclic stress ratio; CSR/resistance proxy; Excess pressure ratio; Excess pore pressure (kPa); Remaining effective stress (kPa); Applied cycles; Peak excess pressure ratio. • Guided experiments: Strong shaking; Low demand; Rapid dissipation. • Four tabs (visual laboratory, curves and measurements, experiments, learn and assess), a model-verification run, a timestamped event log and a trial report.
σv=γsat z; σ′v=(γsat−γw)z CSR=0.65(amax/g)(σv/σ′v)rd; rd=max(0.7,1−0.015z) Teaching generation A=0.15 max(CSR/proxy−0.3,0)f dru/dt=A(1−ru)−ru/Tdrain Δu=ru σ′v0; σ′v=(1−ru)σ′v0
Illustrative pressure-generation/dissipation model, not a validated liquefaction triggering procedure. The resistance control is a proxy, not a calibrated CRR at a reference magnitude/cycle count. Saturated water table at ground surface, γw=9.81 kN/m³. No SPT/CPT corrections, magnitude scaling, plasticity effects, residual-strength or settlement/runout prediction. High ru is a teaching indication of severe effective-stress loss. Structure tilt and grain motions are qualitative. Try the preset experiments, then compare the live readouts with the equations.
Yes. The increment shifts stress from the skeleton to pore water.
No. It is an explicitly illustrative dynamic teaching model.
Illustrative pressure-generation/dissipation model, not a validated liquefaction triggering procedure. The resistance control is a proxy, not a calibrated CRR at a reference magnitude/cycle count. Saturated water table at ground surface, γw=9.81 kN/m³. No SPT/CPT corrections, magnitude scaling, plasticity effects, residual-strength or settlement/runout prediction. High ru is a teaching indication of severe effective-stress loss. Structure tilt and grain motions are qualitative.