The purpose of this paper is to rate the old I-beam bridges designed by workirig stress design method(WSD) by new bridge rating method(ASD) and compare it with other rating methods(WSD and LFD). In rating, only the bending stresses were considered.
A...
The purpose of this paper is to rate the old I-beam bridges designed by workirig stress design method(WSD) by new bridge rating method(ASD) and compare it with other rating methods(WSD and LFD). In rating, only the bending stresses were considered.
At first, in order to use more reliable rating data an I-beam of a two span continuous composite bridge was selected by the WSD method and rated by three methods mentioned above respectively. It was found that the live load rating by the LFD method has 116% higher than the WSD rating and the live load rating by the ASD has 179% higher than by the WSD rating.