Damage states and threshold rotational ductility demands for the bridge piers.
| Damage States||Description of damage states ||Threshold rotational ductility demand |
|None||No damage to a bridge||—|
|Slight||Minor cracking and spalling to abutments, hinges, piers or minor cracking to the deck||3.39|
|Moderate||Any pier experiencing moderate cracking and spalling (pier structurally still sound), any connection having cracked shear keys or bent bolts, or moderate settlement of the approach||4.75|
|Extensive||Any pier degrading without collapse (pier structurally unsafe), any connection losing some bearing support, or major settlement of the approach||8.43|
|Complete||Any pier collapsing and connection losing all bearing support, which may lead to imminent deck collapse||—|