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Notes on the Geography of New Zealand: Christchurch: Photo 40

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A fourth. Here's the clever bit: the buildings are designed to rest on "friction pendulum bearings" placed just above the foundation. This way, the building in an earthquake swings freely as a unit atop rollers and is isolated from the ground. Additionally, the bearings are nested in three stages. A mild earthquake may move the lowest bearing, but only stronger ones will activate the higher ones. The superstructure of "moment resisting frames" is rigid enough that bracing isn't needed on the facade.

For more detail, see http://151cambridgeterrace.co.nz/wp-content/uploads/2014/12/Building-today.pdf

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