Seismic safety experts long have warned that brittle concrete frame buildings pose a particularly deadly risk during a major earthquake. Collapses of concrete buildings have been documented worldwide for decades. But there was no systematic effort by many governments around the world to address the defect in existing concrete buildings. It’s exactly the problem of nonductile [brittle] concrete.”And the video showing the concrete building collapsing, Miyamoto said, has “such a tremendous impact. Older concrete buildings in Los Angeles (Los Angeles Times)The grim toll of concrete buildingsThe brittle concrete defect gained considerable attention after the 1971 Sylmar earthquake caused the collapse of the newly constructed Olive View Medical Center.

Source: Los Angeles Times September 22, 2017 18:16 UTC