Liquefaction-induced settlement of shallow foundations on two-layered subsoil strata

• Published in: Soil dynamics and earthquake engineering (1984) Vol. 94; pp. 35 - 46
• Main Authors: Ayoubi, Peyman, Pak, Ali
• Format: Journal Article
• Language: English
• Published: Barking Elsevier Ltd 01.03.2017; Elsevier BV
• Subjects: Building codes; Dynamic analysis; Earthquakes; Equilibrium analysis; Foundation settlement; Geotechnical engineering; Liquefaction; Numerical analysis; Seismic activity; Seismic design; Seismic engineering; Seismic response; Settlement; Shallow foundation; Shallow foundations; Soil layers; Soil settlement; Strata; Studies; Subsoils; Two-layered soil; Shallow foundation; Settlement; Liquefaction; Two-layered soil; Dynamic analysis
• ISSN: 0267-7261; 1879-341X
• DOI: 10.1016/j.soildyn.2017.01.004

Geotechnical design codes have been shifted from classical limit equilibrium analysis toward the performance-based procedures. In foundation design, settlement is the most representative parameter for its performance. Settlement of shallow foundations subjected to earthquake loading and its consequences is one of the most outstanding issues which should be considered in designing different structures. In this study, settlement of shallow footing on two-layered subsoil strata under earthquake loading is of concern. The numerical study presented in this research by means of a 3D dynamic fully coupled u-p analysis, addresses the effect of different parameters on shallow foundation settlement rested on two-layered soil. Results show that the presence of dense layer can mitigate the settlement up to 50% in comparison to uniform liquefiable layer. Putting the results of all the analyzes together, an equation was proposed in order to estimate shallow foundation settlement on two-layered subsoil. •Shallow foundation settlement is affected by all the parameters.•Some parameters have more significant effect.•A relationship to compute foundation settlement on two-layered soil is proposed.