# FEMA-NIBS Bridge Damage Model

## Class Name

- RFemaNibsBridgeDamageModel

## Location in Objects Pane

- Models > Model > Consequence > Economic > FEMA-NIBS Bridge Damage

## Model Description

### Model Form

- This model produces the damage ratio and the percent functional for a bridge subjected to the ground shaking and the permanent ground deformation based on the HAZUS (FEMA-NIBS 2003) approach.

### DDM sensitivities

## Properties

### Object Name

- Name of the object in Rt
- Allowable characters are upper-case and lower-case letters, numbers, and underscore (“_”).
- The name is unique and case-sensitive.

### Display Output

- Determines whether the model is allowed to print messages to the Output Pane.

### Analysis Type

- List of the types of analysis including ground shaking, ground failure, or both

### Bridge Type

- Type of the bridge according to FEMA-NIBS

### Sa 1

- \({S_{a_1}}\) = 5%-damped elastic spectral acceleration at the period of 1.0s at the bridge site

### Sa 2

- \({S_{a_2}}\) = 5%-damped elastic spectral acceleration at the period of 0.3s at the bridge site

### Time

- Number of days elapsed since the earthquake event

### Number of Spans

- Number of Spans (given as an integer)

### Angle of Skew

- Angle between the centerline of a pier and a line normal to the roadway centerline (given as a real number)

### PGD

- \({PGD}\) = Permanent ground deformation

### Bridge Length

- Bridge Length (given as a real number)

### Span Width

- Span Width (given as a real number)

### Model Uncertainty

- A standard-normal random variable

## Output

- Damage Ratio
- Percentage of Functionality
- The output is an automatically generated generic response object, which takes the object name of the model plus “Response”.

## Right-click Menu

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