fragility-curves

A fragility curve plugin for cloud wat.

The fragility curve plugin takes a set of input seeds representing natural variability and knowledge uncertainty for a given event, and will sample all fragility curves with a curve sample using the knowledge uncertainty seed, and a value sample (failure elevation) using the event seed.

Example Fragility Curve

The table below gives an example of a fragility curve, the x values are probability and the y values are elevation. The elevation is represented as a distribution for a given probability of failure of the infrastructure being modeled. The elevation is expressed as a distributed variable to represent the uncertainty in the predicted elevation of failure for any given probability.

Probability	Min Elevation	Most Likely Elevation	Max Elevation	Distribution Type
0.0	98	99	100	Triangular
0.1	99	100	101	Triangular
0.2	100	101	102	Triangular
0.3	101	102	103	Triangular
0.4	102	103	104	Triangular
0.5	103	104	105	Triangular
0.6	104	105	106	Triangular
0.7	105	106	107	Triangular
0.8	106	107	108	Triangular
0.9	107	108	109	Triangular
1.0	108	109	110	Triangular

That same table is represented in this example json data file

{
    "name":"testModel",
	"locations": [{
		"location": "levee1",
		"probability-stage": {
			"xvalues": [0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1],
			"ydistributions": [{
				"type": "TriangularDistribution",
				"parameters": {
					"min": 98,
					"mostlikely": 99,
					"max": 100
				}
			}, {
				"type": "TriangularDistribution",
				"parameters": {
					"min": 99,
					"mostlikely": 100,
					"max": 101
				}
			}, {
				"type": "TriangularDistribution",
				"parameters": {
					"min": 100,
					"mostlikely": 101,
					"max": 102
				}
			}, {
				"type": "TriangularDistribution",
				"parameters": {
					"min": 101,
					"mostlikely": 102,
					"max": 103
				}
			}, {
				"type": "TriangularDistribution",
				"parameters": {
					"min": 102,
					"mostlikely": 103,
					"max": 104
				}
			}, {
				"type": "TriangularDistribution",
				"parameters": {
					"min": 103,
					"mostlikely": 104,
					"max": 105
				}
			}, {
				"type": "TriangularDistribution",
				"parameters": {
					"min": 104,
					"mostlikely": 105,
					"max": 106
				}
			}, {
				"type": "TriangularDistribution",
				"parameters": {
					"min": 105,
					"mostlikely": 106,
					"max": 107
				}
			}, {
				"type": "TriangularDistribution",
				"parameters": {
					"min": 106,
					"mostlikely": 107,
					"max": 108
				}
			}, {
				"type": "TriangularDistribution",
				"parameters": {
					"min": 107,
					"mostlikely": 108,
					"max": 109
				}
			}, {
				"type": "TriangularDistribution",
				"parameters": {
					"min": 108,
					"mostlikely": 109,
					"max": 110
				}
			}]
		}
	}]
}