PWRI and some private companies had begun six joint researches in 2005 as shown
in Figure 2. Researches and targeting methods are categorized in two, the one is
reinforcement mainly by steel members as (a) ~ (c) in Figure 3, and the other is
improvement of pavement as (d) in Figure 3. For the latter, SFRC pavement is expected to
be one of appropriate methods because it reduces local bending of the deck plate at the
weld root of trough rib without major increase of dead load. Several OSD bridges in Japan
have already applied SFRC pavement. For crack 3 and 4, we have conducted studies by
FEM2)3), and are now doing wheel running test for crack 4.