Evaluation of interaction effects on the system period and the system damping due to foundation embedment and layer depth

Dynamic structure–soil–structure interaction between nearby piled buildings under seismic excitation by BEM–FEM model

“…Other parameters are: foundation mass moment of inertia I o = 5%, 2.2% and 1.25% of mh 2 for h/b = 2, 3 and 4, respectively; structure-soil mass ratio m/4ρ s b 2 h = 0.20; and foundation-structure mass ratio m o /m = 0.25. The values chosen for these three last parameters are considered to be representative for typical constructions, and similar values have been used by other authors before [5,6,9]. In any case, SSI and SSSI results are not significantly sensitive to its variation.…”

“…Soil-structure interaction effects on a single building can be measured by parametersT /T and ζ, whereT is the fundamental period of the soil-structure system andζ its equivalent structural damping (see, e.g., [5,9]). The first parameter accounts for the shifting in the system fundamental frequency, while the effective damping is related to the absolute maximum value of the pseudoacceleration in the structure, i.e.…”

“…Subsequent works enhanced these approaches and considered the effects of foundation embedment and kinematic interaction effects (e.g. [8,9,10,11]). …”

Structure-soil-structure interaction effects on the dynamic response of piled structures under obliquely incident seismic shear waves

“…On the other hand, the constants defining the properties of the soil-structure system are listed in Table 2, where c s is the soil shear wave velocity. These values were chosen in order to be representative for typical constructions and have been used in previous studies [17][18][19][20]. In order to see the dynamic behaviour of the selected soil-structure system, Fig.…”

Revisions to Code Provisions for Site Effects and Soil-Structure Interaction in Mexico

“…Introducing some permissible simplifications, the following expressions can be obtained (Avilés & Pérez-Rocha, 1996): CT K are the damping ratios of the soil for the translational and rocking modes of the foundation. The terms K h ,K r and C h ,C r are the frequency-dependent springs and dampers by which the soil is replaced for the two vibration modes of the foundation.…”