It is quite common to come across cases of bridges which are required to be upgraded & strengthened due to ageing & premature deterioration of concrete & steel etc. However it is too often that we hear of bridges damaged due to accidents and natural calamity. The damage due to abnormal floods is also well known problem. However, accidental damage due to landslide is rather uncommon and such cases are rarely encountered.
Any abnormal behavior of the nature & other factors as mentioned above are responsible for increase in vertical loads, longitudinal loads & movement requirements of the bridge to which it is designed for. These abnormal behavior causes dislocation of Bridge Superstructure, Damaged Bridge Bearings or Damaged Expansion joints system.