Table 1.

The initial features and the features after the narrowing-down process

Initial featuresNo. of types
Damage occurrence locations (e.g. Cantilever)4
Repair (e.g. Temporary_Repair)2
Damage summary (e.g. Corrosion)4
Permanent_Repair1
Previous_Assessment1
water leakage1
Main_Girder_Max_Height1
Main_Girder_Min_Height1
Main_Girder_Count1
Main_Girder_Max_Spacing1
Main_Girder_Min_Spacing1
Main_Girder_Span_Count1
Main_Girder_Position_Relationship1
Main_Girder_Span_Length1
Starting_Pier_Width1
Ending_Pier_Width1
Deck_Thickness1
Main_Girder_Max_Spacing1
Deck_Strength1
Main_Rebar_Diameter1
Main_Rebar_Spacing1
Distribution_Rebar_Diameter1
Distribution_Rebar_Spacing1
Distribution_Rebar_Ratio_Percent1
RC Deck Reinforcement (e.g. Short_Plate)3
Waterproofing_Presence1
Distance of current starting expansion joint1
Distance of current ending expansion joint1
Type of bridge superstructure (e.g. Continuous RC T-girder)18
Type of starting bridge bearing (e.g. Move bering)5
Type of ending bridge bearing (e.g. Move bering)5
Design load (e.g. TL_20)3
Rib cross-section shape (e.g. U)6
Design code (e.g. Road_Instruction_Steel_H8)20
Expansion joint starting material (e.g. Rubber)5
Expansion joint ending material (e.g. Rubber)5
Traffic volume1
Heavy vehicle ratio1
Traffic volume heavy vehicle1
Deck type (e.g. Precast_PC)7
Longitudinal gradient1
Coating (e.g. NU-WF-1)36
Rainfall (mm/year)1
Lowest monthly average minimum temperature1
Expressway route no (e.g. No. 1 Haneda Line)28
Area under the elevated structure (e.g. River)9
Inspection interval from the installation date1
Inspection interval from the painting repair date1
Inspection interval from the pavement base layer installation date1
Inspection interval from the stating expansion joint repaired date1
Inspection interval from the ending expansion joint repaired date1
The features after narrowing down (predicting damage progression)No. of types
Damage occurrence locations (e.g. Cantilever)4
Main_Girder_Max_Height1
Main_Girder_Min_Height1
Main_Girder_Max_Spacing1
Main_Girder_Min_Spacing1
Main_Girder_Span_Length1
Deck_Thickness1
Main_Rebar_Spacing1
Distance of current starting expansion joint1
Distance of current ending expansion joint1
Previous_Assessment1
Water leakage1
Inspection interval from the installation date1
Inspection interval from the Painting Repair Date1
Inspection interval from the pavement base layer installation date1
Inspection interval from the stating expansion joint repaired date1
Inspection interval from the ending expansion joint repaired date1
The features after narrowing down (predicting the occurrence of new damage)No. of types
Damage occurrence locations (e.g. Cantilever)4
Main_Girder_Max_Height1
Main_Girder_Min_Height1
Main_Girder_Max_Spacing1
Main_Girder_Min_Spacing1
Main_Girder_Span_Length1
Starting_Pier_Width1
Ending_Pier_Width1
Deck_Thickness1
Main_Rebar_Spacing1
Distribution_Rebar_Ratio_Percent1
Waterproofing_Presence1
Water leakage1
Traffic volume1
Traffic volume heavy vehicle1
Inspection interval from the installation date1
Inspection interval from the painting repair date1
Inspection interval from the pavement base layer installation date1
Inspection interval from the stating expansion joint repaired date1
Inspection interval from the ending expansion joint repaired date1

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