it is a simple presentation for who want to learn an introduction of base isolation.

1. BASE
ISOLATIO
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2. EARTHQUAKE
 is the shaking of the surface of the Earth

3. BASE ISOLATION
 is one of the most popular means of protecting a
structure against earthquake forces

4. TYPES OF BASE ISOLATORS
 Elastomeric Rubber Bearing :Bearing formed by
horizontal layers of synthetic/natural rubber in thin
layers bound between steel plates.

5. TYPES OF BASE ISOLATORS
 High Density Rubber Bearing: This is another
type of elastomeric bearings

6. TYPES OF BASE ISOLATORS
 Friction Pendulum System: It is sliding type
system of isolation

7. LOCATION OF BASE
ISOLATORS
 The most common configuration is to install a diaphragm
immediately above the isolators.
 If the structure has basement is structure then the options are to
install the isolators at top, bottom & mid-hit of the basement
columns & walls.

8. ADVANTAGES OF BASE
ISOLATED
 The most important advantages lie in the fact that
it protects the structure from seismic activities
 The structures with base isolators are more
predictable & hence they have high reliability as
compared to conventional structures.
 In large seismic forces, the damage is
concentrated in isolation systems where the
elements can be substituted easily.

9. DISADVANTAGESOF BASE
ISOLATED
 It is less efficient for high rise buildings.
 It requires highly skilled labors & engineer for its
implementation.
 It can be applied partially to structures
 It can be done on the structures resting on soft
soils.

10. APPLICATIONS
 LA city hall in the tallest base isolated building in
the world

11. THANK YOU