ASSESSMENT OF THE PC BRIDGE ESTIMATED BY THE PROPERTY OF AFTER 40 YEARS PASSED PC BEAM

Abstract

 On the post-tensioning PC bridges, fracture of PC cable by not filling PC grout has been reported in the world. However, there is no report which clarified the quality about safety when PC cable fracture.
 In this study, we investigated the characteristics of concrete, rebar, PC cable, PC grout and filling situation of PC grout. Moreover, we carried out the loading test and nonlinear analysis using PC bridge, which constructed after more than 40 years.
 According to the experiment results, it is clear that materials did not deteriorate and the ultimate load was higher than the design ultimate load by approximately 20 percent. Even though 1/5 of the PC cable was fractured, ultimate load of the PC bridge was almost same as the design load. But, when 3/5 PC cable was fractured, the ultimate load was comparatively greater than the design load.