Quake-resistant

In the past, making structures quake-resistant meant firm yet 1 materials, such as steel and wood, that bend without breaking. Later, people tried to lift a building off its foundation, and insert rubber and steel between the building and its foundation to 2 the impact of ground vibrations. The most 3 designs give buildings brains as well as concrete and steel supports, called smart buildings, the structures respond like living organisms to an earthquake's vibrations. When ground shakes and the building tips forward, the computer would 4 the building to shift in the opposite direction. The new designs should offer even greater 5 to cities where earthquakes often take place.