Engineers inspecting Chile’s structures after the magnitude-8.8 earthquake that struck the nation’s midsection on Feb. 27 say Chile’s modern buildings are more robust than many equivalent buildings on the West Coast of the U.S. Even concrete frames under construction fared well in the second-strongest temblor on record, say seismic experts. Photo: Miyamoto International Inc. Tower in Concepción appears to lack vertical reinforcing and horizontal confinement. + Image “It’s amazing how little structural damage there is on new buildings,” says Scott Nyseth, a principal in the Vancouver, Wash., office of Miyamoto International Inc. The amount of shear wall per sq ft
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.