Photo by Eduardo Miranda/Stanford A wood-framed house sitting on a system of new, low-cost base isolators survived two series of shake-table tests with no structural damage. Photo by Eduardo Miranda/Stanford Dish-shaped isolator made from galvanized plates and high-density plastic allows the house to recenter itself after an earthquake. Related Links: New Concrete Bridge Bent System May Minimize Seismic Damage Shaking Things Up to Improve Seismic Design Recent shake-table tests on a wood-framed house—equipped with newly developed low-cost seismic base isolators—confirmed predictions that the two-story house would come through structurally unscathed. The goal of the research, considered an important step toward
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.