Gas facility damage

Gas facility damage#

Description

This analysis computes gas facility damage based on a particular hazard. Currently supported hazards are: earthquake.

The process for computing the structural damage is similar to other parts of the built environment. First, a fragility is obtained based on the hazard type and attributes of the building. Based on the fragility, the hazard intensity at the location of the building is computed. Using this information, the probability of exceeding each limit state is computed, along with the probability of damage. For the case of an earthquake hazard, soil information can be used to modify the damage probabilities to include damage due to liquefaction.

The outputs of this analysis are CSV file with probabilities of damage and JSON file with information about hazard and fragilities.

Input Parameters

key name	type	name	description
`result_name` ^*	`str`	Result name	Name of the result dataset.
`hazard_type`	`str`	Hazard type	Hazard type (earthquake).
`hazard_id`	`str`	Hazard id	ID of the hazard from the Hazard service.
`fragility_key`	`str`	Fragility key	Fragility key used in mapping dataset.
`use_liquefaction`	`bool`	Liquefaction	Use liquefaction, if applicable to the hazard. Default is False.
`use_hazard_uncertainty`	`bool`	Uncertainty	Use hazard uncertainty.
`liquefaction_geology_dataset_id`	`str`	Liquefaction id	Liquefaction susceptibility dataset.
`liquefaction_fragility_key`	`str`	Fragility key	Fragility key used in mapping dataset.
`num_cpu`	`int`	Number of CPUs	Number of CPUs used for parallel computations. Default 1.

Input Hazards

key name	type	name	description
`hazard`	`earthquake`	Hazard	Supported hazard object for using local and remote hazards.

Input Datasets

key name	type	name	description
`gas_facilities` ^*	`ergo:gasFacilityInventory`	Facility dataset	A gas facility dataset.
`dfr3_mapping_set` ^*	`incore:dfr3MappingSet`	DFR3 Mapping Set	DFR3 Mapping Set.

Output datasets

key name	type	parent key	name	description
`result` ^*	`ergo:gasFacilityInventoryDamage`	`gas_facilities`	Results	A dataset containing limit state and damage state probabilities (format: CSV).
`metadata` ^*	`incore:gasFacilityDamageSupplement`	`gas_facilities`	Results	Information about applied hazard value and fragility for each facility (format: JSON).

(* required)

Execution

code snippet:

    # Create gas facility damage analysis
    gf_dmg = GasFacilityDamage(client)

    # Load gas facility inventory dataset
    gf_dmg.load_remote_input_dataset("gas_facilities", facility_dataset_id)

    # Load fragility mapping
    fragility_service = FragilityService(client)
    mapping_set = MappingSet(fragility_service.get_mapping(mapping_id))
    gf_dmg.set_input_dataset('dfr3_mapping_set', mapping_set)

    # Specify result name
    result_name = "gf-dmg-results"

    # Set analysis parameters
    gf_dmg.set_parameter("result_name", result_name)
    gf_dmg.set_parameter("hazard_type", hazard_type)
    gf_dmg.set_parameter("hazard_id", hazard_id)
    gf_dmg.set_parameter("fragility_key", fragility_key)
    gf_dmg.set_parameter("use_liquefaction", liquefaction)
    gf_dmg.set_parameter("liquefaction_geology_dataset_id", liq_geology_dataset_id)
    gf_dmg.set_parameter("liquefaction_fragility_key", liq_fragility_key)
    gf_dmg.set_parameter("use_hazard_uncertainty", uncertainty)
    gf_dmg.set_parameter("num_cpu", 4)

    # Run gas facility damage analysis
    gf_dmg.run_analysis()

full analysis: gas_facility_dmg.ipynb