The behavior of engineered structures in the magnitude-8.8 Maule earthquake that struck Chile on Feb. 27 is unlikely to lead to big changes in U.S. practice or codes, agree engineers. Photo: Ramon Gilsanz In Chile, apartment-unit doors jammed, trapping occupants, thanks to lightly reinforced link beams over openings. “The performance of modern engineered construction in the quake was quite good, and most instances of poor performance are associated with differences in Chilean and U.S. design practice,” said Ronald O. Hamburger at the 2010 National Council of Structural Engineers Associations conference, held from Sept. 30 to Oct. 2 in Jersey City,
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.