Photo courtesy of UCSD's Jacobs School of Engineering Researcher preps specimen's base-isolation system for the shake test. Photo courtesy of UCSD's Jacobs School of Engineering The five-story building featured a fully equipped intensive-care unit and surgery suite. In the first of a series of seismic shake-table tests to gauge the effects of major earthquakes and fire on a hospital’s non-structural components and systems, a five-story specimen and its contents came through with flying colors. The excellent performance on April 17, attributed to the specimen's base-isolation system, came as no surprise to researchers at the University of California, San Diego, who
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.