Affiliations: Department of Civil Engineering, National Institute of
Technology Durgapur, Durgapur, India | Department of Earthquake Engineering, Indian Institute
of Technology Roorkee, Roorkee, India
Note: [] Corresponding author: Radhikesh P. Nanda, Department of Civil
Engineering, National Institute of Technology Durgapur, Durgapur-713209, India.
Tel.: +91 343 2546397; Fax: +91 343 2547375; E-mail:
rpnanda2002@yahoo.co.in
Abstract: A feasibility study of friction base isolation system for seismic
protection has been performed. Four different sliding interfaces, namely, green
marble/High Density Poly Ethylene (HDPE), green marble/green marble, green
marble/geosynthetic, and green marble/ rubber layers have been studied through
experimental and analytical investigations. The experimental investigations
show that the coefficient of friction values of these interfaces lies in the
desirable range for seismic protection, i.e., 0.05 to 0.15. The analytical
investigation reveals that most of these sliding interfaces are effective in
reducing spectral accelerations up to 50% and the sliding displacement is
restricted within plinth projection of 75 mm (3 in). Green marble and
geosynthetic are found to be better alternatives for use in friction isolation
system with equal effectiveness of energy dissipation and limiting the
earthquake energy transmission to super structure during strong earthquake
leading to a low cost, durable solution for earthquake protection of masonry
buildings.
Keywords: Base isolation, masonry buildings, pure friction, static and dynamic friction test
