Long-Term Structural Health Monitoring System for a High-Speed Railway Bridge Structure

Table 1

Sensitivity analysis of bridge parameters for SHM design.

Structure	Key position	Critical member	Parameter	Importance	Variation under temperature action	Sensitivity	Decision
Pier	Side spans	4# and 10# piers	Longitudinal displacement	Critical	229 mm	Sensitive	Monitor
Main girder	In the middle of the main span	Steel deck	Vertical displacement	Less-important	35 mm	Less-sensitive	No
Truss arch	In the middle of the main span	Top chord member, diagonal web member, arch rib chord member, and bottom chord member	Static strain	Critical	280 με	Sensitive	Monitor
Truss arch	In the middle of the main span	Top chord member and bottom chord member	Temperature	Critical	60°C	Sensitive	Monitor
Main girder	In the middle of the main span	Steel deck	Temperature	Less-important	60°C	Less-sensitive	No
Whole bridge	/	/	Frequency	Important	/	Nonsensitive	Monitor one
Truss arch	In the middle of the main span	Top chord member	Wind	Less-important	/	Less-sensitive	No