Role of Nonlinearity in the Soil in Earthquake-Resistant Design of Structures

The nonlinearity of the soil may considerably affect response structures subjected to seismic events. This paper aims show under which circumstances geometry, soil, and earthquake-type; is important. A simple model based on a 1D shear column was developed calculate maximum strain (γ) in earthquake excitation. It found that γ function peak ground acceleration PGA horizontal displacement (∆). EC8 provides an expression for calculating ∆ independent thickness. this conservative shallow layers underestimates thick ones, as result, improvements have been suggested. By performing several time history analyses, formulas are enable designer assess when must be taken into account. Four curves thickness introduced different types (A, B, C, D) using limit value = 10–4. These depending depth, threshold nonlinear behavior around 0.48, 0.36, 0.29, 0.10 m/s2 A, D, respectively. Obviously, analysis performed moderate seismicity.