Performance-based verification method for ground improved by sand compaction pile with spatial variability in soil strength

Key Points

• To examine the liquefaction characteristics and earthquake-induced settlement properties of ground improved by sand compaction piles considering spatial variability in soil strength.
• Conducted earthquake response analysis with simulated spatial variability in soil strength.
• Utilized 50 Monte Carlo simulations to gather sufficient statistical data on earthquake-induced settlement.
• Proposed a performance verification method assuming a normal distribution for settlement frequency of structures.
• SCP method reduces variability in earthquake-induced settlement despite spatial variability in soil strength.
• Achieved statistically significant data after 50 trials of Monte Carlo simulation.
• Proposed performance verification method shows reliability for SCP improved ground under seismic conditions.