Building damage

Building damage#

Description

This analysis computes building damage based on a particular hazard. Currently supported hazards are: earthquake, tsunami, tornado, hurricane and flood.

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, tsunami, tornado, hurricaneWindfields).
`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. Default is False.
`seed` ^*	`int`	Seed	Initial value to seed the random number generator.
`num_cpu`	`int`	Number of CPUs	Number of CPUs used for parallel computation. Default is 1.
`liquefaction_geology_dataset_id`	`str`	Liquefaction id	Liquefaction geology/susceptibility dataset id. If not provided, liquefaction will be ignored.

Input datasets

key name	type	name	description
`buildings` ^*	`ergo:buildingInventoryVer4` `ergo:buildingInventoryVer5` `ergo:buildingInventoryVer6` `ergo:buildingInventoryVer7`	Building dataset	A building dataset.
`dfr3_mapping_set` ^*	`incore:dfr3MappingSet`	DFR3 Mapping Set	DFR3 Mapping Set.
`retrofit_strategy`	`incore:retrofitStrategy`	Retrofit Strategy	Building retrofit strategy that contains guid and retrofit method.

Input Hazards

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

Output datasets

key name	type	parent key	name	description
`ds_result` ^*	`ergo:buildingDamageVer5`	`buildings`	Results	A dataset containing results (format: CSV).
`damage_result` ^*	`incore:buildingDamageSupplement`	`buildings`	Results	Information about applied hazard value and fragility (format: JSON).

(* required)

Execution

code snippet:

    # Create building damage
    bldg_dmg = BuildingDamage(client)

    # Load input dataset
    bldg_dmg.load_remote_input_dataset("buildings", bldg_dataset_id)

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

    # Specify the result name
    result_name = "memphis_bldg_dmg_result"

    # Set analysis parameters
    bldg_dmg.set_parameter("result_name", result_name)
    bldg_dmg.set_parameter("hazard_type", hazard_type)
    bldg_dmg.set_parameter("hazard_id", hazard_id)
    bldg_dmg.set_parameter("num_cpu", 10)

    # Run building damage analysis
    bldg_dmg.run_analysis()

full analysis: building_dmg.ipynb