Abstract
As ultra high strength fiber reinforced concrete (Ductal) is new generation concrete material possessing high strength, high ductility, high fluidity and high durability, it is possible to drastically reduce the dead weight of the bridges made of Ductal compared with those made of ordinary concrete. The authors have been challenging the technical development and have accomplished a 40 m long mono-rail girder based on the accumulated design and construction know-how for recent five years. The developed long span girder is consisted of six pre-cast segments and its cross section is a box shape. The construction and structural safety performance have been verified before the construction of a 40 m long mono-rail girder, through a series of experiments and FEM analyses such as a fundamental joints tests, fabrication tests using a 10 m long mono-rail girder and loading tests.
