Traffic Capacity Assessment of the Urban Elevated Bridge after Near-Field Explosion Based on the Response Surface Method

Table 3

Damage states of several analytical cases.

Analytical case	R (m)	Damage states of the pier
1# car bomb	1.2	The concrete is almost completely destroyed within the height of 0 m–2 m above the ground on the near-explosion face side, and the failure rate of longitudinal reinforcement (percentage of the number of failure longitudinal reinforcements to the total number) is as high as 47.92%.
	3.5	Most of the concrete protective layer is peeled off at the height of 1 m on the near-explosion face side. A few reinforcements are exposed, but none of them reaches the failure strain.
	6.0	Part of the concrete is sheared and damaged at the pier’s bottom, and no reinforcement is exposed.
2# car bomb	1.2	The concrete protective layer is almost completely peeled off at the height of 1 m on the near-explosion face side, and the failure rate of longitudinal reinforcement is 7.69%.
	3.5	The concrete in edge areas is peeled off at the height of 1 m on the near-explosion face side, and no reinforcement is exposed.
	6.0	The concrete protective layer is almost intact, and no reinforcements are exposed.
3# car bomb	1.2	Part of the concrete is sheared and damaged at the bottom of the pier, and a few of the reinforcements are exposed.
	3.5	The concrete protective layer is almost intact, and no reinforcement is exposed.
	6.0	The concrete protective layer is almost intact, and no reinforcement is exposed.