Modified ultimate bearing capacity formula of strip footing on sandy soils considering strength non-linearity depending on stress level

• DOI: 10.1016/j.sandf.2023.101325
• Publication Date: 2023-06-13T09:19:15Z
• Authors: Tahir Iqbal; Satoru Ohtsuka; Koichi Isobe; Yutaka Fukumoto; Kazuhiro Kaneda
• Keywords: Centrifuge; Shear Strength; Linear elasticity; Stress space

Most of the contemporary ultimate bearing capacity (UBC) formulas assume a linear yield function in shear stress-normal stress space. However, experimental investigations have corroborated non-linearity failure envelopes sandy soils. This study focused on assessment level effect UBC surface strip footings ascribed to soil unit weight (γ), footing size (B), and uniform surcharge load (q). The rigid plastic finite element method (RPFEM) was employed for analysis. analysis validated against centrifuge test results from published references case various soils with different relative densities. RPFEM, using mean confining dependence property Toyoura sand, is utilized non-linear model soil. normalized ground domains strength are gleaned smaller than those one. numerical compared guidelines Architectural Institute Japan (AIJ) Road Association (JRA). modification coefficients ascertained frictional factor (Nγ) (Nq), modified formula proposed. performance proposed examined prevailing guidelines.