Damage Detection in Bridge Structures through Compressed Sensing of Crowdsourced Smartphone Data

Table 3

Damage scenarios considered in the laboratory experiments and their corresponding fundamental natural frequencies of the bridge.

Damage case	Location	Stiffness reduction	Cut dimensions	Bridge fundamental frequency (Hz)
DC1a	Mid-span	15%	24.8 mm × 250 mm	3.62
DC1b	Mid-span	30%	49.5 mm × 250 mm	3.52
DC2a	span	15%	24.8 mm × 250 mm	3.66
DC2b	span	30%	49.5 mm × 250 mm	3.61
DC3	Boundary condition change	—	—	8.40