Function
- Automatically calculates effective width of PSC Box section (1Cell, 2Cell, nCell, nCell2) and PSC-Tee type section. When the effective width of sections I and J differs within a single element, 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 the new Boundary Group (WZ-EW-#).
Call
From the main menu, select [Structure] tab > [PSC Bridge] group > [PSC Bridge Option] > [Effective Width]
Input
Effective Width Scale Factor dialog box
Design Code
Following design code can be used:
EN 1992-2:2005
AASHTO LRFD Bridge Design Specifications 2012
2005 Korean Standard Specifications for Highway Bridges (KR-KSCE05)
Japanese Standard Specifications for Highway Bridges (JIS-Civil)
Chinese Standard Specifications for Highway Bridges (JTG D62-2004)
Calculation of bs and bf
Exact : Considers the linear deformation of bm/b in "a, c" interval. (Refer to 2005 Road & Bridge Design Standard).
Approximation : Does not consider the linear deformation of bm/b in "a, c" interval. Calculates the effective width only using bs, bf value. (Refer to 2005 Road & Bridge Design Standard).
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
Check on whether to reflect the translation of neutral axis due to considering the effective width. Calculated result is produced as z_top & z_bot Scale Factor in the Effective Width Scale Factor Table.
Show Calculation Result...
Save and display the calculation results of the stiffness considering the effective width.
Fig. The stiffness ratio of each element considering the effective width and the shifted position of the centroid.
Fig. The stiffness ratio of each element considering the effective width.