## Function

- Automatically calculates effective width of Composite section (Steel-Box, Steel-I, Composite-I, Composite-T, Composite-PSC type). If the effective width of a single element varies between the I and J ends, the effective width at each location is calculated separately.
- From the section of the girder defined in Span Information, Effective Width automatically calculates the moment of inertia (Iyy) about the y-axis and checks the sectional stresses reflecting the effective width. A scale factor of the new moment of inertia and neutral axis to the original moment of inertia and neutral axis is created. This generates the data for Boundary>Effective Width Scale Factor.
- The calculated Effective Width Scale Factor is included in a new Boundary Group (WZ-EW-#).

## Call

From **main menu**, select **[Structure] tab > [Wizard] group > [Composite Bridge] > [Effective Width]**

## Input

Effective Width Scale Factor dialog box

### Design Code

Following design code can be used:

EN 1994-2:2005 (Steel-I Type1, Steel-Box Type 1, Composite-I, Composite-T, Composite-PSC type)

SNiP 2.05.03-84* (Steel-I Type 2 section, Box/Tub)

SP 35.13330.2011 (Steel-I Type 2 section, Box/Tub)

JTG D64-01-2015 (Steel-I Type 2 section, Box/Tub)

IRC:22-2015 (teel-I Type1, Steel-Box Type 1, Composite-I, Composite-T, Composite-PSC type)

### Shear Connector Distance

**b _{0}** : The distance between the centers of outstanding shear connectors.

### Half Haunch Distance

**a** : Required for SNiP 2.05.03-84* and SP 35.13330.2011

### Scale Factor

Apply the scale factor to the effective width calculated. If the effective width multiplied by the scale factor is larger than the total width, then the total width is used.

### Consider the Variation of Centroid

Apply the scale factor to the effective width calculated. If the effective width multiplied by the scale factor is larger than the total width, then the total width is used.

### Show Calculation Result...

Save and display the calculation results of the stiffness considering the effective width.

Stiffness ratio and neutral axis considering the effective width

Stiffness ratio considering the effective width