ABSTRACT
In seismically active regions, one way of protecting buildings from ground shaking damages is to adopt base isolation techniques. The conventional techniques of base isolation system such as elastomeric bearings require costly installation procedure. Therefore the present study aims to utilize a control proportion of sand and rubber tyre scrap mixture as a possible base isolation material. The static and seismic response of a typical low-rise framed structure supported on raft foundation placed on the Geo-Base Isolation (GBI) layer consisting of sand-rubber mixture reinforced with geogrid layers is carried out using finite element code ABAQUS for various earthquake input motions. It is found that the introduction of geogrid layers improve the bearing capacity and settlement performance of the GBI system. The proposed GBI layer with geosynthetic reinforcement significantly reduces the peak spectral acceleration.
