Structures Seminar: Steel Towers for Long Span Bridges
Dr. Charles King from COWI North America, Ltd. describes the design of the towers of the proposed suspension bridge across the Straits of Messina between Italy and Sicily. The mainspan will be 3300 metres long, about 60% longer than the longest existing span anywhere in the world. The towers will be 400 metres high, with a constant cross-section 20 metres by 12 metres, made of longitudinally stiffened steel plates. The structural behavior and the design philosophy will be explained for both design with equivalent imperfections and for verification by Finite Element Analysis using non-linear geometry and material properties with expected initial imperfections.
Dr. Charles M. King, Ph.D, C.Eng, F.I.Struct.E is a senior steel specialist at COWI North America, Ltd. (formerly Buckland & Taylor, Ltd.). Since graduating as a Civil Engineer in 1972 in Scotland, Charles has worked in the design and construction of buildings, bridges, satellites, and launchers. He now works for COWI North America as the senior steel specialist for the design of many cable-stayed and suspension bridges, for example, Tappen Zee, NY, USA, Ohio River Downtown at Louisville, KY, USA and the deck replacement of Macdonald Bridge in Halifax, NS. He has designed structures varying in weight from 15kg in the space industry to 50,000 tonnes for each tower of the Messina suspension bridge between Italy and Sicily, which will have a main span of 3300 metres. He has written design guides for steel structures in the UK, participated in the development of the Eurocodes and British Standards for steel structures, and is now on the committee for steel design for the Canadian bridge code.