Earthquake Resistent Structures

This document discusses earthquake resistant structures and techniques. It begins by defining earthquakes as sudden movements of the earth's surface that can range from tiny to several feet and release enormous amounts of energy, greater than a nuclear bomb. It then explains that earthquake resistant designs analyze the forces that would act on buildings during earthquakes to ensure the structure can withstand them. Key earthquake resistant techniques discussed are base isolation devices that separate the building from the ground using rubber devices, and seismic dampers that absorb seismic wave energy. Specific seismic damper types including viscous, friction, and yielding dampers are also mentioned.