This study developed an optimal structural system for the hybrid cable-stayed bridge expected to have a durable lifetime of 200 years and of which major structural members are made of ultra high performance concrete (UHPC) with 200 MPa-class compressive strength. This innovative cable-stayed bridge system makes it possible to reduce each of the construction and maintenance costs by 20% compared to the conventional concrete cable-stayed bridge by improving significantly the weight and durability of the bridge. Therefore, detail design is carried out considering a real 800 m cable-stayed bridge and the optimal structure of the hybrid cable-stayed bridge is proposed and verified.
 C. H. Lee, W. J. Chin, E. S. Choi and Y. J. Kim, “An Ex perimental Study on the Joints in Ultra High Performance Precast Concrete Segmental Bridges,” Journal of the Ko rea Concrete Institute, Vol. 23, No. 2, 2011, pp. 235-244. doi:10.4334/JKCI.2011.23.2.235