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Unformatted text preview: Freeways o Are either non-ductile or ductile reinforced concrete 1971 San Fernando eq o Building code underwent major revision in 1992 that basically outlawed non-ductile concrete buildings shift to use ductile concrete o Learned that confinement is absolutely key o Column-to-beam connections are even more important in a steel-framed building than a concrete building Number of shear wave cycles that a building goes through and the duration of an earthquake are so important because it will determine the shaking and weakening of a building Perpendicular shear walls o Key element in concrete buildings Retrofitting o Build a new frame/foundation inside the building and bolt the new structure to the old one o...
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- Fall '07