A shaking of the earth caused by a sudden movement of rock bneath the Earth's surface. An earthquake occurs on a fault, which is a thin layer of crushed rock between two blocks of rock. A fault can range in length from a few centimeters to thousands of miles. Stresses in the earth's outer layer push the sides of the fault together. Stress builds up and the rocks slip suddenly, releasing energy in waves that travel through the rock to cause the shaking that we feel during an earthquake.
Earthquake Resistant Provisions in Masonry Buildings with Strip Foundation
read full article....The Indian subcontinent has a history of devastating earthquakes. The major reason for the high frequency and intensity of the earthquakes is that India is driving into Asia at a rate of approximately 47 mm/year.Geographical statistics of India show that almost 54% of the land is vulnerable to earthquakes.
SEISMIC ACTIVE ZONE:
The design of a seismic resistant building involves the usage of seismic coefficients. For the purpose manipulating these coefficients the country is divided into FIVE zones ( as recommended in IS 1897 – 1984)
ZONE 1 Area without any dam ...read full article....
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