EXPERIMENTAL INVESTIGATIONS TO ASSESS THE PERFORMANCE OF INDIGENOUSLY DESIGNED BASE ISOLATORS USING SHAKE TABLE

Pavithra.R, Vijayalakshmi Akella, Puneeth.T

Abstract: Earthquakes are by far the most unpredictable and highly destructive as compared to other natural disasters, releasing large amount of energy in the form of vibrations that damage structures. Base isolation provides earthquake resistance to the structure. Mechanism of base isolators increases the natural period of the overall structure and decreases its acceleration response to seismic motion. The existing research and knowledge based on the physical characteristics of different types of seismic base isolators and the validity of assumptions involved in the design can be strengthened with shake table tests. In this paper, experimentation is carried out using Lead sandwiched with Rubber layer as Base Isolators for a 4-storeyed prefabricated single bay steel frame model. The performance of the base isolators are evaluated using Shake Table Tests and the efficiency of the base isolators is demonstrated. Comparative study is done on the test analysis results of with base isolation and without base isolation. Lead Rubber Isolators are found to reduce the vibrations transmitted to the upper storeys

Keywords: Earthquake, Base Isolation, Shake Table Tests, Lead Rubber Bearings etc.

DOI: https://doi.org/10.15623/ijret.2017.0617002