Thursday, December 1, 2011

Low seismic capacity starts to close buildings


The past few large earthquakes have taught the intelligent people of the world (not here!), that earthquakes happen everywhere at the 1 in 1000 level, and that there should be a minimum seismic capacity for all structures, no matter what the Jaws-like denying officials think.

I divide the world into 3 seismic capacity levels

Level 1 - Smooth Runnings - seismic capacity, expressed by PGV, where there should be no damage, and the place 'rides out' the storm.  Nuclear power plants, hospitals, etc should have a high value.

Level 2 - Incapacity - the building is 'taken out', non operational.  Very bad for Canada in the winter.  Power systems are very low for this.

Level 3 - Pancaking - This won't really happen for Canada, although I do see those cheap condos tipping over.

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