Abstract
AbstractDuring an earthquake event, structures on soft and loose soil pose more complicated seismic behaviour compared to similar structures on the rock or stiff soil. This is due to various reasons including ground motion amplification in soft soil, kinematic interaction, large deformations at foundation level influencing the eigenvalue and damping properties of the structure, material and geometric damping of the soil and so on. Several past studies have indicated that the deformations at the foundation base, particularly the rocking of shallow foundation and subsequent energy dissipation may pose a beneficial effect on the structure through reducing floor acceleration, column moment, and ductility demands of the structural members. However, adverse consequences, such as excessive permanent and transient settlement and tilting of the foundations are also associated with rocking shallow foundations. In this background, the present study aims to investigate the utility of geosynthetics as a potential improvement of the subsoil to reduce the earthquake-induced settlement of low-rise steel-moment-resisting frame (SMRF) structures.
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