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123456789_123456789_1123456789Concrete Bridge Software 

Analysis Model
ICDAS YouTube Channel   ICDAS COB 2018.00R

Road Bridge Model Examples
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Concrete Bridge

Model Examples

Model description


Geometry model

Analysis model

Landscape model

ICDAS Basis of Design

Workflow of Software

Additional features

Rendering & Animation 

Case study







How to create LUSAS model automatically?

It happens when you import Lusas*.cmd in Lusas

(File > Import). The *.cmd file is automatically  

created when you run ICDAS Add-Ins in Revit 2018. 

The input files are located in C:\ICDAS\ICDAS

BRIDGE when you installed ICDAS COB 2018.00R

There are two automations run in analysis model for

concrete bridges:


§      Automatic creation of bridge geometry and FEM

§      Automatic creation of loads and combinations of

      loads on bridge




Automatic creation of bridge geometry and FEM

§    Geometric points, lines, surfaces with dimensions

    of the bridge as designed in Revit model from


§    Solid slab deck or box deck girder in 3D shell QTS8/

    QTS4 elements and thicknesses

§    Piers in geometric lines for beam elements


§    Groups of bridge elements on the left and right

    side of STLo overpass.


Alternative Text

Figure: LUSAS FEM Deck Box


Automatic creation of loads and combinations of loads, SLS and ULS

§    Lusas interface giver you a user-friendly list of all single load cases where you directly can

    visualize a single load case and the behavior of the bridge subjected to that load case. 

    However, the user need to define and assign loads on bridge from the one to another project.

    Using ICDAS, these works will be done automatically 

§    Lusas interface giver you a user-friendly list of all smart combinations of loads in which you

    directly can modify load factor on a single load case in a combination. However, the user need

    to create these combinations from the one to another project. Using ICDAS, these works will

    be done automatically, in both of SLS and ULS combinations of loads.

§    Load combinations according to Danish Road Directorate April 2015 & Eurocodes, SLS & ULS.

§    Final envelope of SLS Quasi Permanent Load Combinations

§    Final envelope of SLS Frequent Load Combinations


§    Final envelope of SLS Characteristic Load Combinations

   §    Final envelope of ULS Load Combinations

See more about Loads on Bridge described in Arch Bridges.



 Figure: Example of bridge deck deformation due to tandem point load, single load case.


Number of spans?

ICDAS Bridges has no limited number of spans, for both of LUSAS FEM model and Revit geometry model.



Curved corridor of the bridge overpass?

Analysis model handles the curved overpass STLo by multi straight lines of 1m each. Coordinates for

Lusas points are obtained from AutoCAD Civil 3D Points Report (Alignment XY coordinates and elevation

Z-levels along the STLo).

Prestressing cables?

The cable curves (X,Y,Z) is designed in ICDAS Excel and paste in LUSAS manually.

See example of prestressing cables in 150m length Savstrup double curved bridge deck.


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Updated 28-09-2017

ICDAS  •  Hans Erik Nielsens Vej 3  •  DK-3650 Ølstykke  •   
E-mail: th@icdas.dk   •  Tel.: +45 20 20 33 78  •  CVR no.: 34436169