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Category : Earthquake Engineering

Earthquake engineering deals with the study of earthquake forces and its effects on the buildings and structures.

EARTHQUAKE MAGNITUDE AND ENERGEY RELEASED

RELATION BETWEEN EARTHQUAKE MAGNITUDE AND ENERGY RELEASED An earthquake of magnitude 8.2 releases 1000 times more energy than the earthquake of magnitude of 6.2 and 32 times more than the magnitude of 7.2. A table below gives the relation between magnitude change ...

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Earthquake Resistant Design Techniques for Buildings and Structures

The conventional approach to earthquake resistant design of buildings depends upon providing the building with strength, stiffness and inelastic deformation capacity which are great enough to withstand a given level of earthquake-generated force. This is generally accomplished through the selection of ...

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SOURCES OF EARTHQUAKE DAMAGE

Vibration of the structure in response to ground shaking at its foundation is the concern of the structural engineer, and which is taken into account by codal provisions of the different seismic-resistant design codes. However, these codes do not include ...

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EARTHQUAKES EFFECTS ON REINFORCED CONCRETE BUILDINGS

Reinforced Concrete Buildings In recent times, reinforced concrete buildings have become common in India, particularly in towns and cities. Reinforced concrete (or simply RC) consists of two primary materials, namely concrete with reinforcing steel bars. Concrete is made of sand, crushed ...

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HOW BUILDINGS TWIST DURING EARTHQUAKES?

Why a Building Twists In your childhood, you must have sat on a rope swing – a wooden cradle tied with coir ropes to the sturdy branch of an old tree. The more modern versions of these swings can be seen ...

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SEISMIC DESIGN PHILOSOPHY FOR BUILDINGS

The Earthquake Problem Severity of ground shaking at a given location during an earthquake can be minor, moderate and strong. Relatively speaking, minor shaking occurs frequently, moderate shaking occasionally and strong shaking rarely. For instance, on average annually about 800 ...

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ARCHITECTURAL FEATURES & EARTHQUAKE

Importance of Architectural Features The behaviour of a building during earthquakes depends critically on its overall shape, size and geometry, in addition to how the earthquake forces are carried to the ground. Hence, at the planning stage itself, architects and structural ...

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SEISMIC EFFECTS ON STRUCTURES

What are the Seismic Effects on Structures? Inertia Forces in Structures Earthquake causes shaking of the ground. So a building resting on it will experience motion at its base. From Newton’s First Law of Motion, even though the base of the ...

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MAGNITUDE & INTENSITY OF EARTHQUAKE

The point on the fault where slip starts is the Focus or Hypocenter, and the point vertically above this on the surface of the Earth is the Epicenter (Figure 1). The depth of focus from the epicenter, called as Focal ...

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HOW THE GROUND SHAKES DURING EARTHQUAKE

Seismic Waves Large strain energy released during an earthquake travels as seismic waves in all directions through the Earth’s layers, reflecting and refracting at each interface. These waves are of two types – body waves and surface waves; the latter are ...

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