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

Table 2

Damage cases considered in the numerical modeling and corresponding fundamental natural frequencies of the bridge.

Damage case	Location	Stiffness reduction	Bridge fundamental frequency (Hz)
DC1a	Mid-span	15%	2.06
DC1b	Mid-span	30%	2.03
DC2a	span	15%	2.04
DC2b	span	30%	1.98
DC3	Boundary condition change	—	4.72