Damage Classification Information

NameSeligson et al. (1996) - Storage Tank
Hazard TypeEarthquake
Plant Unit TypeStorage Tank
Description

Damage states for horizontal storage vessels.

States
NoCodeNameDescription
1.DS1None

None or insignificant structural damage (damage ratio: 0 - 0.05%).

2.DS2Light

Slight movement of tank from support (damage ratio: 0.05 - 1.25%).

3.DS3Moderate

Failure of some connected piping; repairable damage to the tank support system; moderate likelihood of release of tank contents (damage ratio: 1.25 - 20%).

4.DS4Severe

Failure of most piping connections; tank support system completely failed; almost certain release of tank contents (damage ratio: 20 - 65%).

5.DS5Total

Failure of all piping connections; tank support system completely failed; tank itself damaged (possible buckling); contents of tank released (damage ratio: 65 - 100%).

ReferencesSeligson, H. A.; Eguchi, R. T.; Tierney, K. J.; Richmond, K., "Chemical hazards, mitigation and preparedness in areas of high seismic risk: a methodology for estimating the risk of post-earthquake hazardous materials release", 1996
AccessPublic
Created: System – Updated: Serkan GIRGIN, 2016/03/01 14:22:18

Risk States

NoDamage StateScenario ParametersValidity Conditions
1.DS1 (None)LOC State: None--
2.DS2 (Light)LOC State: Minor--
3.DS3 (Moderate)LOC State: Moderate--
4.DS4 (Severe)LOC State: Major--
5.DS5 (Total)LOC State: Catastrophic--

Fragility Curves

NoNameParameterUnitValidity Conditions
1.Seligson et al. (1996)MMI-Shape: Cylindrical Horizontal; Storage Condition: Atmospheric5-

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