Damage Classification

NameFlood Damage states for storage tanks
Hazard TypeFlood
Plant Unit TypeStorage Tank
Description

Damage states due to the hydrodynamic effects of the flood waters.

States
NoCodeNameDescription
1.DS0None

No damage.

2.DS1Floatation

Uplift and displacement of storage tanks due to buoyancy.

3.DS2Shell Buckling

Buckling leading to shell collapse due to an external pressure above the critical pressure.

4.DS3Sliding

Rigid sliding of unanchored tanks due to the hydrodynamic pressure of the flood surge.

5.DS4Debris Impact

Impact with waterborne debris and other floating objects (e.g. storage tanks).

ReferencesKhakzad, N.; Van Gelder, P., "Fragility assessment of chemical storage tanks subject to floods", 2017
AccessPublic
Created: Serkan GIRGIN, 2017/10/19 01:59:55 – Updated: Kyriaki GKOKTSI, 2023/05/03 09:29:09

Risk States

NoDamage StateScenario ParametersValidity Conditions
1.DS1 (Floatation)DSFlood: Floatation--
2.DS1 (Floatation)LOC State: Minor--
3.DS1 (Floatation)LOC State: Moderate-10
4.DS2 (Shell Buckling)DSFlood: Shell Buckling--
5.DS2 (Shell Buckling)LOC State: Moderate--
6.DS2 (Shell Buckling)LOC State: Moderate-10
7.DS3 (Sliding)DSFlood: Sliding--
8.DS3 (Sliding)LOC State: Moderate-10
9.DS4 (Debris Impact)DSFlood: Debris Impact--

Fragility Curves

NoNameParameterUnitValidity Conditions
1.fr_crv_fnƒ(x)--vwater: 2 m/s; ρ: 647–648 kg/m3; Shape: Cylindrical Vertical; h: 39 m; d: > 16 m4-
2.ST1 Flood Fragility Curveƒ(x)--vwater: 1 m/s; ρ: 870–950 kg/m3; Shape: Cylindrical Vertical; h: 10 m; d: 20.6 m; Base Support Type: Unanchored; Fill Percent: 35 %v4-
3.ST4 Flood Fragility Curveƒ(x)--vwater: 1 m/s; ρ: 870–950 kg/m3; Shape: Cylindrical Vertical; h: 10 m; d: 16 m; Base Support Type: Unanchored; Fill Percent: 35 %v4-
4.ST2,ST3 Flood Fragility Curveƒ(x)--vwater: 1 m/s; ρ: 710–770 kg/m3; Shape: Cylindrical Vertical; h: 10 m; d: 20.6 m; Base Support Type: Unanchored; Fill Percent: 35 %v4-

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