Yusuf Zahit Gündogdu, M.S.SE
Chodai Turkey Representative
STATE-OF-THE-ART OF NEW MATERIALS AND FUTURE PERSPECTIVES ON SUPER LONG SPAN BRIDGES
Tetsuo Yamane, Chodai, Japan
Akira Takaue, Chodai, Japan
Torahiko Ikeda, Chodai, Japan
Yusuf Zahit Gündoğdu, Chodai, Turkey
In this study, feasibility of using new materials for super long bridges to extend the length of center span will be discussed. First, Carbon-Fiber Reinforced Plastic (CFRP) material will be introduced. When examined in contrast, superiority of CFRP material’s structural properties, such as unit weight, tensile strength etc., over conventional steel wire will be emphasized. Then a trial concept design, 5,000m center span length, will be exhibited, followed by addressing the technical issues of CFRP material to be solved. Furthermore, practical state-of-the-art and recent advances in high-strength steel wire will be presented. Thermo-Mechanical Controlled Process (TMCP) and conventional steel wire production technologies will be compared. Two types of high performance steel produced by using TMCP which show improved yield strength, welding workability, formability and fatigue life when compared to conventional steel will be investigated. Finally, future super long bridge project plans in Japan will be introduced.