Table 2 Monitoring content and number of measuring points.

From: Research on safety condition assessment methodology for single tower steel box girder suspension bridges over the sea based on improved AHP-fuzzy comprehensive evaluation

Location

Monitoring project

Number of measuring points

Tower top, mid-span

Wind speed and direction

1

Cable saddle, tower top, mid-span

Temperature and humidity

2

Pier cap

Ship collision and seismicity

3

Below cable saddle

Concrete strain

20

Tower top

Tower deviation (GPS)

2

Critical section of the main beam

Main cable displacement (GPS)

1

Suspension cables

Cable forces

12

Steel box, main cable

Vibration

11

Expansion joint, anchor block

Displacement

6

Main girder section

Deflection

8

Main girder section of the bridge tower

Temperature

8