Stonecutters and Sutong Bridges in China have pushed the world record for main span length of cable-stayed bridges to over 1000 m. In his Overseas Prize winning paper presented at the ICE on 14 June 2012, Professor Morgenthal, Chair Professor of Modelling and Simulation of Structures at the Institute of Structural Engineering, the Bauhaus University Weimar, Germany, discussed some revealing differences in their dynamic response to wind action.
The design of these bridges, both located in typhoon-prone regions, was strongly influenced by wind effects during erection. Rigorous wind tunnel test programmes were devised and executed to determine the aerodynamic behaviour of the structures in the most critical erection conditions. Testing was augmented by analytical and numerical analyses to verify the safety of the structures throughout construction and to ensure that no serviceability problems would affect the erection process.
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Behaviour of very long cable-stayed bridges during erection
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