a tour of INNOVATION

introducing

EARTHQUAKE

ENGINEERING

What are we talking about?

We have features for every step of the way

Earthquake Engineering

Our model and ideology

Earthquake Resistance

EARTHQUAKE ENGINEERING

Design, organize, and construct

Earthquake engineering is the scientific field

concerned with protecting society, the natural and

the man-made environment from earthquakes by

limiting the seismic risk to socio-economically

acceptable levels.

Getting Started

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gThe main objectives of Earthquake Engineering are:

I. To see, the potential consequences of strong Earthquakes on urban areas and civil infrastructure.

II. Design, construct and maintain structures to perform at Earthquake exposure up to the expectations and in compliance with building codes.

III. To create Earthquake-resistant buildings for almost all soil types present around us.

IV.To directly connect technology with the safety of construction.

History of Earthquake Resistance

Construction

Earthquake resistant construction has long been practiced in several countries around the globe, and they all follow various techniques to it.

We will be concentrating on the technique named, Active Mass Damping.

ACTIVE MASS DAMPING

Computations of mass required to sway a building with respect to the earth movement.

It’s not just about the CONSTRUCTION but strengthening

THE BASE.

Swaying Mechanism for areas where the base is weak: Active mass damping

Usually used in the marshy parts of the globe, where the base of the building cannot be trusted with the strength and protection of that construction.

How Active Mass Damping works?

• For buildings in the tropical region, where the ground sets down during the rainy seasons, the base cannot be trusted for a big building. In such cases, no mechanism can be fit to the base of the building. Rather a swaying ball, with the weight same as the building is attached to the top of the structure, as shown in the picture below. The metal ball sways opposite to the motion of the earth.

MASS DAMPER

Sill-anchoring Technique

• Sill anchoring is initiated by construction of a wooden base was a building which is provided the correct shock resistance by tightening the wooden sill with bolts. They are a part of active shock control devices which physically move the base to keep up with the sudden changes due to seismic forces.

• This method of anchoring sill plates does keep the boards attached to the foundation during an earthquake, but it fails to help the structure as a whole absorb and withstand the forces of seismic shock.

SIL-ANCHOR MECHANISM

What about the resistance systems we’re yet to mention?

They are same too.

Seismic Loading

• Seismic loading means application of an earthquake-generated excitation on a structure (or geo-structure). It happens at contact surfaces of a structure either with the ground, with adjacent structures, or with gravity waves from tsunami.

Vibration control and Classifications

• Seismic vibration control is a set of technical means aimed to mitigate seismic impacts in building and non-building structures. All seismic vibration control devices may be classified as passive, active or hybrid where:

• passive control devices have no feedback capability between them, structural elements and the ground;

• active control devices incorporate real-time recording instrumentation on the ground integrated with earthquake input processing equipment and actuators within the structure;

• hybrid control devices have combined features of active and passive control systems.

Prevention from severe Earthquakes

Building elevation control is a valuable source of vibration control of seismic loading. Pyramid-shaped skyscrapers continue to attract the attention of architects and engineers because such structures promise a better stability against earthquakes and winds. The elevation configuration can prevent buildings' resonant amplifications because a properly configured building disperses the sheer wave energy between a wide range of frequencies.

Bridge between concepts and the model

Broadcast and compress for seamless delivery

»The model talks about the designing and functioning of a real time environment of earthquake-resistant architecture.

»Both Sill anchoring technique and active mass damping are preventive methods to control the destruction of both heighted and grounded buildings.

The Real Connection:

?But wait…There’s More!

We will conclude with suggestions and techniques to estimate the earthquake loss!

Loss Estimation

• You can always develop to your best when you know what you have lost. People learn from their losses and plan a better future.

• Earthquake loss estimation is usually defined as a Damage Ratio (DR) which is a ratio of the earthquake damage repair cost to the total value of a building. Probable Maximum Loss (PML) is a common term used for earthquake loss estimation, but it lacks a precise definition.

THANK YOU!

WISHES AND REGARDS!