# Regional Loss

## Class Name

## Location in Objects Pane

- Models > Model > Consequence > Economic > Regional Loss

## Model Description

### Model Form

$$l = \left( {\sum\limits_{k = 1}^K {{\eta _k} \cdot {A_k} \cdot {C_k}} } \right) \cdot \exp \left( { - r \cdot t} \right)$$
$$\ln \left( {{\eta _k}} \right) = \ln \left[ {{\vartheta _{1k}} \cdot \Phi \left( {{\vartheta _{2k}} \cdot Sa_2^{{\vartheta _{5k}}} + {\vartheta _{3k}} \cdot Sa_1^{{\vartheta _{5k}}} - {\vartheta _{4k}}} \right)} \right] + {\varepsilon _k}$$

### 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.

### Boundary Location List

- List of location objects of the corner points of the region

### Centroid Location

- A location object that will take the region’s centroid coordinates.

### Sa 1

- \({S_{a_1}}\) = 5%-damped elastic spectral acceleration at the period of 1.0s at the region’s centroid.

### Sa 2

- \({S_{a_2}}\) = 5%-damped elastic spectral acceleration at the period of 0.3s at the region’s centroid.

### Unit Area Cost List

- \({C_k}\) = Unit area cost list for different zones within the region.

### Area Ratio List

- \({A_k}\) = Area ratio list, that is the ratio of different zone areas to the total area of the region.

### Time

### Annual Interest Rate

- \({r}\) = Annual Interest Rate

### Theta 1 List

- \({\vartheta_{1k}}\) = List of \({\vartheta_{1}}\) model parameters for different zones within the region.

### Theta 2 List

- \({\vartheta_{2k}}\) = List of \({\vartheta_{2}}\) model parameters for different zones within the region.

### Theta 3 List

- \({\vartheta_{3k}}\) = List of \({\vartheta_{3}}\) model parameters for different zones within the region.

### Theta 4 List

- \({\vartheta_{4k}}\) = List of \({\vartheta_{4}}\) model parameters for different zones within the region.

### Theta 5 List

- \({\vartheta_{5k}}\) = List of \({\vartheta_{5}}\) model parameters for different zones within the region.

### Epsilon List

- \({\varepsilon_{k}}\) = List of \({\varepsilon}\) model error for different zones within the region.

### Color

- Color of the region on Google Maps

### Total Area

## Output

- \({I}\) = Total regional loss due to repair cost of buildings.
- The output is an automatically generated generic response object, which takes the object name of the model plus “Response”.

## Right-click Menu

### Remove

### Display On Map

- Displays the object on map.

### Remove From Map

- Removes the object from map.

### Display Locations Inside