G+3 RESIDENTAL BUILDING
An innovative approach for earthquake safe structures
Presented by group -O
Shubash Sah Godh
Sunil Kumar Das
Binod Kumar Tharu
Prakash Diwakar Karna
Nabin Kumar Gupta
What is base isolation ?
Base isolation is a state-of-the-art method in which the structure
(superstructure) the structure is separated from the base (foundation or
substructure) by introducing a suspension system between the base and the main
Base isolation, also known as seismic isolation system, is a collection of
structural elements which should substantially decouple a superstructure from
its substructure resting on a shaking ground thus protecting the building’s
It is the most powerful tool of the earthquake engineering pertaining to the
passive structural vibration control technologies.
An base isolation system must satisfy four basic criteria of effectiveness, in
particular, acceleration response, shear and overturning moments are reduced
by a factor of four to eight for buildings mounted on isolators.
(IJISET - International Journal of Innovative Science, Engineering & Technology, Vol. 1
Issue 8, October 2014.)
Base Isolation System using Elastomeric Bearings Base Isolation System using Elastomeric Bearings
Goals of base isolation
Protection of Life – Current Code
Additional Benefits of Isolation
Protection of Building Frame
Protection of Non-Structural Components and Contents
Provide for an operational facility after the earthquake
Protection of Processes and Function
San Francisco Airport International Terminal
World’s Largest Isolated Building
Applications of Base Isolation
1st application in New Zealand in 1974
1st US application in 1984
1st Japanese application in 1985
US - 80 buildings and 150 bridges
Japan - 1000 buildings and 500 bridges
India – Bujhi hospital Gujrat 2001, Few Buildings
Nepal – Not recorded yet
Movement of Building with Base
Isolation vs. No Base Isolation
advantages of base Isolation
# Base Isolation is meant to enable a building or non-building structure to
survive a potentially devastating seismic impact through a proper initial design
or subsequent modifications(retrofit).
# The application of this technique can raise a structure's seismic performance
and its seismic sustainability considerably.
# It provides the design profession the ability to design a building that is
“operational” after a major earthquake.
Can be easily applied in increasing skyscrapers with a little
development in technical skills.
Economically feasible if the cost after earthquake is accounted.
Nepal, being in highly earthquake susceptible region, may serve a
Costly, at the initial phase of construction.
Requires higher technology and design
Reinforced concrete frame structure
At least 4 bedroom, living room, utility rooms, staircase and lift
Parking lot , yard and garden
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