The document discusses the phenomenon of earthquakes and the importance of earthquake-resistant designs in structures. It covers various aspects such as the causes of earthquakes, the impact of ground acceleration on building damage, and techniques like base isolation and damping devices to protect buildings from seismic activities. Additionally, it highlights the role of technology and design advancements in creating safer constructions for the public.

1. Presented by
D.Uday Kumar and
J.Prasad

2.  Sudden movement of earth surface is called Earthquakes
 The structures able to resist earthquake induced vibration
is known as earthquake resistant structures
 Such design is called Earthquake resistant designs

3. NATURAL ACTIVITIES
 Due to movement of
tectonic plates
 Due to faults present
beneath the earth
HUMAN ACTIVITIES
 Construction of dams
 Ground water extraction
 Skyscrapers
 Fracking and Injection wells

4.  Shaking
Ground moves in the same place
 Land slides
Ground is moved to some another place
 Liquifaction
Strength of the ground is reduced
causing buildings to sink

5.  Ground acceleration and building
damage
The damage that a building suffers
primarily depend not on
displacement but on acceleration
 Building stiffness
Taller buildings are more flexible
than shorter buildings
 Ductility
Ductility is the ability to undergo
deformation
 Damping
Moves forward and backward

6. BASE ISOLATION
DEVICES
 Base isolated structure
is supported by a
series of bearing pads
which are placed
between building and
building foundation
 Lead rubber bearing is
sandwiched between
two steel plates

7. 7

8.  building is supported by
bearing pads that have a
curved surface and low
friction
 building is free to slide on
the bearings

9.  Reduce the building acceleration by ¼
the acceleration of fixed base building
 Acceleration decreased because the
base isolation system lengthens the
building's period of vibration.
 Rubber is highly elastic so reduce the
damage
 Converts the kinetic energy as heat

10.  Also called energy dissipation
devices
 Which absorb vibrations caused due
to earthquakes
TYPES
 Viscous dampers
Reduce the vibrations by fluid
action
 Tuned mass dampers
Reduce the vibrations by harmonic
action

11. COMPONENTS
 Piston Rod
 Cylinder
 Fluid
 Seal
 Piston Head
 Seal Retainer
 Accumulator

12.  Also known as a harmonic
absorber
 Mounted in structures to
reduce the amplitude of
mechanical vibrations by
harmonic motions
 Prevent discomfort and
damage
 It is a Lightweight
component
COMPONENTS
 Spring
 Oscillating Mass
 Viscodamper

14. We are only hope of tomorrow’s constructions.
‘’ WE ARE HERE ONLY TO PROVIDE SAFETY TO PUBLIC TO
LEAD THEIR LIFE ‘’
HAPPILY

15. www.multyscience.co.uk
www.institute of structuralengineer.com
www.faddoengineers.com
Technological advance in Japanese building design and
construction
http://www.taipei-101.com.tw/en/Tower/buildind_13-1.html
http://www.esm-gmbh.de/EN/Products/Tuned_mass_dampers