Bridge Spanning Up to 2800m

This paper presents preliminary results for developing a feasible design of suspension bridge of which main span length reaches up to 2800m. The design works have been performed in collaboration between Yooshin Engineering Corporation and KOCED Wind Tunnel at Chonbuk National University. From the preliminary wind tunnel test for feasible girder sections, twin box girder was finally adopted. After wind tunnel tests of various variation of twin box girders, final candidate was selected considering aerodynamic performance as well as construction cost. The aerodynamic stability of the girder section was confirmed from the full aeroelastic model tests. The present design of suspension bridge is optimized structurally and aerodynamically to ensure a safety and serviceability of bridge under wind action during the design life.