03-11-2014, 09:19 AM
Abstracts: In this project we have study about the earthquake basis, causes of earthquake, seismic zone in India, seismic effect on the structure. In recent years base isolation has become an increasingly applied structural design technique for buildings and bridges in highly seismic areas. The study about the precaution which contain various methods to be applied in the construction of the earthquake resisting building. The study of base-isolation which mainly contain application of the base-isolation, importance of base isolation and provision of base-isolation to resist the earthquake prone area again the collapsing of the building. The flexibility of the isolation system increases the fundamental period of the structure, shifting it out of the region of dominant earthquake energy. The energy-dissipation capacity increases damping, which reduces excessive displacements due to the laterally flexible isolation system. Energy is released during an earthquake in several forms, including as movement along the fault, as heat, and as seismic waves that radiate out from the "source" and causes the ground to shake, sometimes hundreds of km's away. A seismic wave is simply a means of transferring energy from one spot to another within the earth. Although seismologists recognize different types of waves, we are interested in only two types: P (primary) waves, which are similar to sound waves, and S (secondary) waves, which are a kind of shear wave. Within the earth, P waves can travel through solids and liquids, whereas S waves can only travel through solids.